Antennal setae short and thick, extending less than two-thirds of distance to occipital corners; cableway joints, except for end, transverse, end joints as long as the previous four joints together. Head and body thickly punctate and rounded, head webbing thicker and denser than thorax and abdomen. 4 PROCEEDINGS OF THE NATIONAL MUSEUM. common as long as these and the third together; 2-7 transverse nodes; .. club very weakly defined, with the terminal node nearly as long as the three preceding together.
Antennae basally narrowed and strongly depressed on parietal half, extending about two-thirds of distance to occipital corners, first ascending limb broader than long and a little longer than second, remaining joints, except terminal, strongly transverse, terminal joint, as long as four joints before resigning. Antennae leaves almost reaching the occipital corners; first funicular joint aslongas joints2-3 together; second joint longer than wide, remaining joints gradually increasing in width; terminal as long as the two preceding joints together. Epinotum as long as pro and mesonotum combined, base slightly convex in profile, inclination straight, laterally bluntly bordered on upper half, margin terminating in stout, blunt spines.
16 PROCEEDINGS OF THE NATIONAL MUSEUM
Size smaller, integument almost dark, with striation of head and thorax proportionately thicker; Gastric segments 1-3 are densely punctate striate and subopaque; the petiole, seen from the front, is distinctly broad and more narrowly rounded laterally; the color is dark brown, with yellow petiole and legs and reddish mandibles and antennal appearance. Antennal setae extending approximately four-fifths of distance to occipital corners, moderately stout; second cableway node as long as third and longer than first, all nodes longer than wide, thicker apically, terminal node shorter than the two preceding ones together. Petiole wider in front than behind, twice as long as wide, slightly longer in profile. se broad, slightly convex above, armed anteroventrally with an acute spine, which curves backward.
Bust robust, although narrower than the head. from above slightly longer than wide with moderately convex sides and rounded humerus. Head a little longer than wide and as wide in front as behind, sides slightly convex, occipital corners rounded, edges straight. Antennae short and strong, projections reaching occipital corners; first funicular joint almost as long as the next three joints; articles 2-6 transverse, article seven about as long as broad, articles 8-11 longer than wide, together forming a club much longer than the rest of the funicular; with the terminal joint a little shorter than the two preceding joints combined.
Postpetiole elongated, shorter and slightly wider than the petiole, longer than wide, widest behind the center; in profile, rather strongly convex above. This species, which is dedicated to Don Felix Vacarro, of Ceiba and NeAV Orleans, and the previous species are the same in the structure of the antennae, but otherwise have the characteristics of the ovinis Stenamma. There is to me in the series some variation in the sculpture and in the degree of the angle between the base and the slope of the epinotum, which in some workers is very finely serrated on the sides and in others rounded angulated.
Head, excluding mandibles, one and one-third times as long as wide, letl}' broadest in front: sides nearly straight, corners of neck broadly rounded, margin of neck rather strongly concave; .. vertex with a narrow and dee]) median sinus. Antennae short and rather slender; The shaft is somewhat flattened at the base, extending a little less than half the distance to the occipital; the first cable joint is distinctly longer than the second and third joints combined, and the third joint lies as broad, long joints 4-8 gradually increasing in length, distinctly distinct clubs, approx. Petiole wider than long and nearly twice as wide as petiole; sides sub-angled in front of the middle, (grid length.
Head a little longer than broad and about as broad in front as behind, sides and posterior border almost straight, occipital angles broadly rounded.
ANTS FROM HONDUBAS AND GUATEMALA MAXN
Rugulose front and top and with fine striae, which are reticulated on the cheeks, longitudinal to the middle of the front and curved on top and nape and more approximated. Head slightly longer than wide, slightly narrowed anteriorly, sides slightly convex, occipital corners very broadly rounded, posterior margin straight. Antennae surmount occipital corners by about one-fifth of their length; carpels 2-8 slightly longer than wide; clubs slender, the first two segments equal in length and together about as long as the terminal.
Differing from the typical Megalomyrmex in the shape of the pro- and mesonotum, which are not separated by a suture and together form a semicircular mass, and in the structure of the mandibles, which are fiat and have only two teeth. A good run of Avorkers were caught in Ceiba and San Juan Pueblo, nesting in the ground or in rotten logs. The workers name this species in the key of Emery and closely agree with the description of Trout, which was based on specimens from St. Vincent.
30 PROCEEDINGS OF THE NATIONAL MUSEUM
31and becomes diagonal posteriori}^ on the sides, the surface between and becomes diagonal posteriori}^ on the sides, the surface between and antennal fossae densel}^ spicate. Described by six workers who were found in a tree trunk at the edge of the forest. When disturbed, they raised the bodj' and pushed the gaster forward and below it in the usual manner of Macromischa.
In its large size, coarse sculpture, the short antennae and in the structure of the nodal scan, it is completely different from the other Central American species. Antennal scapes stout, not attaining occipital corners, funicular joints, except the first and the three forming the club, strongly transverse, terminal joints distinctly longer than tAvo preceding joints. Epinotal base rather flat and sloping, c. along the slope; spines straight, pointed at tips, as long as their distance apart at base, directed backward and upward, and moderately divergent; inferior spines broad and rounded.
Postpetiole in profile slightly shorter than petiole node and less convex above; from above almost circular in shape and small widethantenode. Uogeria tonduzi Forel, the only other known Central American species, has the clypeal margins raised, the thorax is strongly convex and without traces of the mesoepinotal impression, the caudal node gradually rising from the head impure and impure than in height. Antennal views extending four-fifths of distance to occipital corners; first cable carpel longer than second and third combined, nodes 2-8 strongly transverse;.
Petiole with a slender petiole shorter than the node and rounded above; nodein profile as long as wide, evenly convex above; from above one and a third times abroad. Thorax rugosely striated, two striae at base transversely, the rest irregularly longitudinal on pro and mesonotum and reticulateonepinotum.
34 PBOCEEDINGS OF THE NATIONAL MUSKUM
Base of epinotum about as long as declivity, its surface weakly convex above; spines slender, slightly curved upwards, longer than their distance from each other at the base. The head approx. one-fourth longer than wide, deeply and roundly excavated behind, occipital corners narrowl}^ rounded; sides in front of eyes biconvex, behind eyes slightly convex. Supraorbital carinae straight, divergent, two-thirds as long as antennal scapes; scrobes broad and moderately concave.
Pronotumflatinprofile, distinctly emarginate anteriorly, less distinct laterally; widest a little before the middle, where the sides are obtusely angular. Base of epinotum narrow, nearly twice as long as protuberance; spines slender, longer than their distance at the base, moderately divergent, directed ba^lvAvard and upwards, and slightly curved downwards. The head is about one-fourth longer than wide, the posterior border concavely cut, the occipital corners evenly rounded: the sides of the ])oculars are nearly flat, slightly convex in front of the eyes.
Antennal views extending about three-quarters of distance to occipital angles; funiculus not very slender, first node longer than second and third together, second and third nodes nearly as broad. Epinotal base fiat, longer than the declivity, spines shorter than their distance at the base,. Mandibles less than half as long as head, rather thin and pale, outer margin shallowly concave before middle, inner margin basally.
Antennal scapes less than distal half, upper margin very shallowly concave, inner margin rounded at middle; first cableway node as long as second and third together, third node slightly shorter than first; terminal node slightly longer than remainder of funiculus. Petiolar node above wider than long, very slightly wider behind than in front, with weakly convex sides and anterior margin almost straight; in profile slightly shorter than pedicel, rounded above and sloping anteriorly.
40 PROCEEDINGS OF THE NATIONAL MUSEUM
Pedicel of petiole n slightly longer than the node; node in profile a little higher than long, abrupt before and behind and nearly iiat above; from above, as long as wide, slightly convex at the sides and straight in front and. Head, excluding mandibles, longer than wide, shallowly and broadly carved posteriorly, posterior part of sides truncate. Scutellum about as long as wide, slightly convex, impressed in the middle of the posterior margin.
Antennal leaves but moderately expanded at the base, with a broadly rounded angle; funicular joints 2-5 less th:m twice as wide as long, joint six longer than wide, terminal joint about as long as remnant of funicle. Epinotal base inclined, on a plane different from the mesonotum and separated from it by a rounded angle, flat, longer than wide and scarcely longer than the slope; two surfaces separated by a transverse ridge. Petiolar thick about one and a half times as wide as long, subovate; in profile higher than the long and elongate pedicel, anteriorly acute, the dorsum slightly convex and sloping from front to back, the postpetiole about twice as wide as long and one and a half times as wide as the petiole.
Head longer than wide, narrowest in front, broadly concave behind, occipital angles subangular; occipital center with a pair of low-rounded, longitudinal ridges, parallel to each other; and becomes obsolete on the vertex. Postpetiole twice as wide, twice as thick and two and a half times as long as the petiole; in profile longer than wide, highest anteriorly, with a weakly convex anterior surface that broadly rounds to a long, flat posterior surface; from above, a little longer than wide, widest in the middle, anterior margin narrowly rounded, sides weakly convex. Head a quarter longer than broad, slightly narrowed in front, sides a little convex, occipital angles subangular, margin almost straight; vertex rather strongly depressed in the middle between the frontal c-arinae, occiput with three smaller impressions, the outer two of which are bordered by fine carinae.
Base of epinotum flat, quadrate, much longer than wide, shorter than recurved, both surfaces with thin lateral margins bearing triangular spines at angle. Petiolar peduncle longer than node, anteroventral spine very small, node in pro-. folder rounded in front, flat and sloping above; above, longer than broad margin, rounded anteriorly and concave posteriorly. Petiole in profile longer than high, convex above, laterally with short longitudinal ridge; above longer than wide, very slightly wider in front than behind, with a narrow pair, laterally in posterior half.
Base of epinotum more than twice as wide as long in middle, in profile about one-fourth as long as the sloping declination to where it gradually rounds.
