The antennal leaf is short, slightly inflated across the middle, about three and a half times its length. Nap completely bordered; chain joints entirely wider than long; parapsidal grooves very weakly impressed on anterior corners of mesoscutum; scutellum without transverse furrow; propodeum less than half as long as scutellum, without neck, with distinct transverse and median longitudinal carinae, lateral folds distinct; head, mesoscutum and scutellum with fine deep. Head as wide as thorax, viewed from above about two and a half times wider than long.
A woman. Head seen from above transversely, as wide as thorax, or nearly so; occiput moderately concave and bordered; posterior orbits rather narrow; eyes not far from eye margin, arranged in a slightly obtuse triangle; viewed from the front, the head is as long as wide or longer than wide; antennae inserted distinctly below ventral margins of eyes, widely separated at base; scrobes consisting of a rounded shallow depression that is poorly defined;.
ART. 4 NEW PARASITIC HYMENOPTERA GAHAN 11 thin, temples narrow with the posterior orbit depressed and forming
The four known species belonging to the genus can be separated by the following key, which in the case of the Girault and Dodd. Lower half of the erf, not transversely isolated, but finely reticulate-pointed or greenish; lateral lobes of mesoscutum not transverse, but very finely torn; legs mostly very dark brown or black, the anterior and median coxae mostly rufo-testaceous, their femora and tibiae varied with testaceous and the hind femora marked outwards towards apex with.
16 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 71
ART. 4 NEW PARASITIC HYMENOPTEEA — GAHAN 17 coarser cilia extending obliquely inward and backward from the
Types of all the above species of ApJddencyrtus are in the National Museum of the United States, and a careful comparison of these types together with a study of additional material has convinced the writer that they are all one species. The small differences that Girault points out for the separation of the species are variable and not of specific value.
ART. 4 NEW PARASITIC HYMENOPTERA GAHAN 19
The axils appear to be somewhat more distinctly granular than in the female, and the mesoseutum and scutellum appear to have somewhat larger reticulations. Belongs to the group having all tarsi distinctly 5-jointed and similar to pergandiella Howard, but distinguishable from this species by the shorter first funicular joint as well as by much. Antennae not quite as long as the body, piano very feebly; pedicel ovate, about one and a half times as long as thick; the first funicular joint shorter and narrower than the pedicel, about one and a half times as long as thick; second distinctly longer than the first, about equal in length to the pedicel; third to sixth odd in length and each about one and a half times the other; the last two joints are somewhat more closely connected than the preceding, but are not thicker than the fourth joint and only a little thicker than the first; flagellated with sparse inconspicuous hairs; mandibles tridentate; vertex granulose rugulose; mesoscutum and scutellum also granulated, the paired setae.
4 NEW PARASITIC ni'MENOPTERA GAHAN 21 . in length by 0.14 in width) the marginal fringe very nearly e([ual to the width of the wing; discal cilia absent from that part of the wing behind the submarginal vein and also from a rounded area embracing the stigmal vein; the rest of wing surface mostly ciliated, but with a narrow border around the outer part of the wing almost or quite bare except for a single row along the margin; submarginal vein with two bristles; hind wing with marginal cilia about twice as long as the width of the wing, the disc ciliation consists of a row along the anterior margin from the apex of the venation to the apex of the wing, a more or less imperfect row along the posterior margin from near the base to the apex, and a short row between these two which does not reach the apex of the wing; all tarsi distinctly o-jointed; abdo-. Differs from the description of conjugata also in having the antennae 8-jointed in the male instead of 7-jointed Antennae nearly as long as body, 8-jointed, scape slender, pedicel one and a half times as long as broadapex; the first flagellated nearly twice as long as the pedicel; second, third, fourth, and fifth joints equal in size, about three times as long as broad, and each very little longer than the first; apical joint conical and slightly shorter than the preceding.
Pettit, of the Michigan College of Agriculture, and is said to have been raised on June 28, 1924, from the above-mentioned pine leaf-scale on Pinusstrohus. It is similar to (Mimatomus) Prospaltelh, peltatus Cockerell, in that the marginal margin of the forewings is short, and the longest marginal cilia is about one-sixth the length of the greatest width of the wing, but.
ART. 4 NEW PARASITIC HYMENOPTERA — GAHAN 23
Easily distinguished from the other species known to the author by the color of the legs. In the three specimens from Massachusetts the entire front and face are dark reddish-brown instead of black as in the type. Harold Compere, of the California CitrusExperiment Station, recently sent the writer several specimens raised on December 1, 1925.
The writer, after examining the type, is of opinion that it belongs in the genus Physcus where it differs. Muesebcck, of the Gypsy Moth Laboratory at Melrose Highlands, Massachusetts, recently sent the writer a series of 13 males and 12 females of Pleurotropis, all reared from cocoons of Ayanteles melanoscelus collected in Frankhn, New Hampshire, and listed under Gypsy Moth Laboratory No. Among these males are specimens which duplicate both in antennal characters and in all other respects the type of males of both tarsalis and ashmeadi. In all of them the flagellum beyond the ring joints consists of five joints, but in some specimens all five joints are clearly separated and short pedunculated, while in others the last joint is closely associated with the penultimate one, apparently lacking the peduncle altogether. The former condition is precisely the one found in the type. tarsalis, while the latter is similar to that of the ashmeadi type.
The types of females as given by Crawford are indistinguishable and agree in all respects with the females of the Muesebeck series. Ins.Mens., Vol. 8, 1920, p. 97) corresponds most closely with this insect, but the = author of this genus places it in the family Mymaridae, a group to which the present form is not related, and as the description is insufficient for positive i'leitification, one. MIT.4 NEW PAEASITIC HYMENOPTERA GAHAN 27 Omphalini and in the key to the genera of this tribe runs out at Clos-.
MIT. 4 NEW PAEASITIC HYMENOPTERA GAHAN 27 Omphalini and in the key to genera of that tribe runs out at Clos-
Described by 6 females and about 150 males mounted inbalm on 12 slides, and 1 female and 34 males mounted on card points. Van Heurn published a figure and description of this insect together with some descriptions of its habits* but did not mention it. It is at his suggestion conveyed through Dr.L.O.Howard that the writer has undertaken to name him here.
AKT. 4 NEW PARASITIC HYMENOPTERA GAHAN 29
30 PROCEEDINGS OF THE NATIONAL MUSEUM vou71 veins and end distally in a broad curve; all coxae and femora black tinged with purple; hind tibiae black; anterior and median. Similar to the female, except that the second and third funicular joints are distinctly pedunculated at the tip, the fourth funicular joint is congruent with the rest of the antennae, the stalks of the second and third funicular joints are pale, metallic. These adults as well as larvae and pupae of the parasite were found in the burrows of the beetles by Mr.
Hairdresser in a sporophore of Polyporia gilvus infested by Brachycis and Ceracis, received from a New York City correspondent. Can be distinguished from platyhypenae Howard and marginatus Ashmead by the white marked face, and from comstochi Howard, leucotropJiU Howard, semi- marginatus Girault and pachyscaphaGirault by the more distinctly sculptured scutellum in which it resembles hicolor Walker, but is.
ABT. 4 NEW PARASITIC HYMENOFIERA GAHAN 31 praesciitum with a very fine but distinct median longitudinal
32 PROCEEDINGS OF THE NATIONAL MUSEUM vol.71 a large pair of elongated plates (fig. 2; ST), which are apparently ventrally produced lobes of the eighth tergite, and partially another pair of plates (fig. 2; 9T), which are apparently formed from the ninth tergite. tergite. The length of the egg and the degree to which it protrudes forward below the breast varies in different species, this is new. In Anapliespollipes Ashmead, however, the ovi-positor and venter are, in spite of the fact, exactly the same as in Anaphoidea.
PODEALspiracle;ST,secondary gyrate; ST, THIRD tergite; JtT, fourth tergite; 5T, fifth tergite- 6T, sixth tergite; 7T, seventh tergite; 8T, eighth tergite; 9T, ninth tergite;O,ovipositor;.»,. Very similar to pullicrura Girault, but can be distinguished from that species as well as from other closely related species by the fact that the basal joint of each tarsus is distinctly longer than the second. The abdomen of the female is also somewhat longer and more acute at the apex, the ovipositor longer and further projected for-.
ABT.4 NEW PARASITIC HYMENOPTERA GAHAN 33 region below the thorax, and the wings are narrower than in most.
ABT. 4 NEW PARASITIC HYMENOPTERA GAHAN 33 ward under the thorax, and wings narrower than in most of the
Described from one hundred and twenty-three specimens comprising several series and representing several generations reared through various hosts, received from A. Satterthwaite, of the United States Bureau of Entomology, Field Laboratory at Webster Groves, Missouri. The second series consists of five females reared from the egg of C. parvula collected in the field at the modothy in Kirkwood, Missouri (Webster Groves No. 24086); seven copies, offspring of the previous ones, produced through eggs of C.
The remaining 72 specimens from the type series were obtained in the same manner as those already listed and involve the same host species, but some were obtained from different localities. One hundred and eleven specimens of the type series, including the holotype and allotype, were mounted in balsam on 41 slides; 12 para-types are mounted on card points. There is a large variation in size of individuals in this series, the length of females varying from 0.40 mm.
The size of individuals is directly correlated with the size of the host egg and the number of individual parasites it harbors. There is some variation in the relative lengths of the funicular joints and to a very slight extent in the proportions of the wings; the median row of disc cilia in the apex of the hind wing may contain as many as six cilia or may be absent altogether; the femora in some individuals almost entirely lack the dark brownish infuscation; in other respects the series appears to be uniform. Idiocentrus by the fact that the antennal club is 2-jointed instead of 3-jointed, the antenna 10-jointed instead of 11-jointed, the abdo-.
36 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 71
ART. 4 NEW PARASITIC HYMENOPTERA GAHAN 37
Black; extreme base of scape, trochanters, all tibiae and all tarsi rufo-piceustorufo-testaceous; antennae, except base of sheep, black, and all coxae and femorblack; wing hyaline. Hamlin; and three females and one male from eggs from NarniaJemorata Stable, Brownsville Texas, August 1922, by T.
ART. 4 NEW PAKASITIC HYMENOPTERA GAHAN 39 Family PLATYGASTERIDAE
EXPLANATION OF PLATE
