White Mountains, New Hampshire; but in this species the apex of the first vein is far in advance of the apex of the anterior branch of the heel, the accessory cross-vein is wanting, &c. In this and other structural features it agrees very well with the members of the present family. Black, second antennal joint and base of third, palpi, halteres, coxae, femora and male hypopygium yellow, tibiae brownish yellow; body hair yellow; the thorax is subtransparent, thin gray, dry;.
It spans the northern part of the United States and extends as far south as New Jersey, Kansas, and southern California. Originally described from Pennsylvania; to the east it does not appear to occur south of the said state, but extends north-. Schiner's description and figures except in the structure of the legs, but these are not sufficiently different to warrant the establishment of a separate genus for the present form.
Black, the buds of the halteres and the hairs on the apical part of the male antennae, and the whole antennae of the female, whitish; thorax polished, abdomen opaque; thigh bones slender, without thorny bristles, first tarsal joint at least twice as long as the second, the last joint below not spiny, claws small and of equal size; wings hyaline, glabrous, the third vein on its basal fourth united with the first. Vein, tip of the latter almost opposite to the apex of the first third of the third vein, apex of the third vein about three-quarters of the wing length, petiole of the second posterior cell slightly shorter than the small transverse vein.
DIPTERA 399
Originally described from Washington
400 COQUILLETT Ornithodes gen. nov
DIPTERA 401
402 COQUILLETT
DIPTERA 403
404 COQUILLETT
DIPTERA 405
406 COQUILLETT Family XYLOPHAGID^
DIPTERA 407 This species was originally described from Labrador, and Osten Sacken
408 COQUILLETT
DIPTERA 409
4IO COQUILLETT
Legs and venter of abdomen dark brown, proboscis shorter than height of head, hipipegium of malev^holly and sparsely covered with bristle hairs, bare of a tuft of these hairs, the dorsal piece bearing a pair of long, subcylindrical, fleshy processes, which is covered with short hairs, filament free. Classified by its short proboscis, this species would be placed in the genus Hilara; but its elongated third antennal connection with the minute. Black, the first two antennal joints and the legs dark brown, the knees and haltei-es yellow; upper part of the occiput and sides of the front velvety black, middle of the front below the laestocellus, face, cheeks, and lower part of the occiput gray pruinose; eyes of the male almost as widely separated as the posteriorocelli, third joint of antennae conical, slightly longer than wide, less long than the style, proboscis as long as the height of head, hairs of palpi and underside of head whitish, those of back of head yellowish brown; thorax slightly polished, marked with three indistinct black vittae, almost glabrous, in the middle, behind the suture, with a golden yellow pubescence, no hairs before the halters, scutellum with four bristles and few short hairs; abdomen slightly polished, his hair yellow, hippiegium of male small, almost bare.
412 COQUILLETT
DIPTERA 413
414 COQUILLETT Rhamphomyia flavirostris Walker
DIPTERA •M5
Female: Differs from the male as follows: anterior half of the mesonotum opaque, gray frosted, marked with four polished black vittae, the remainder of the thorax, the carapace and the first five segments of the abdomen, densely silvery white frosted, hairs on the belly quite short, at the back. Closely related to Ibnbata and Irregularis, but in these species the lower outer corner of the male prehensiles is rounded and the fourth vein extends to the wing margin in both sexes. Black, the barbells light yellow, hair and bristles black; eyes of male contiguous, third joint of antenna a little more than twice as long as wide, about four times as long as the style, proboscis about as long as the height of the head; body opaque, blue-gray frosted, hairs sparse and rather short, shield with four bristles, hypopygium rather small, ascending obliquely, with several long bristly hairs, brackets elongated conical, filiform, the exposed part about five times as long as the first joint of hind tarsi, the latter much thicker than that of the other tarsi, much narrower than the tibiae, the posterior tibiae of the male bears on the outside a number of rather long bristly hairs, in the female ciliates with almost erect scales, wings hyaline, stigma light yellowish, veins yellowish brown, normal, last part of the fifth vein, more than twice as long as the previous part, the sixth vein reaches the wing edge.
Diffei's from the above description oiglauca only as follows: Mesonotum slightly polished, thin dark gray pruinose, hairs of male hippiegium sparse and rather short, the claspers suboval, near the tip of. DirTERA 417 underside bearing a dense tuft of rather short hairs, filament rather slender, the exposed portion only slightly longer than the first joint of the hind tarsi, hind tibiae of male externally bearing some short hairs, in the female not ciliate with scales, last section of fifth vein sometimes less than twice as long as preceding section. Differs from glauca as follows: Mesonotum marked with four polished vittae that sometimes almost meet; segments three to five of abdomen, and sides of the second, polished, then narrow backs of these segments whitish, hairs on sides of abdomen.
Differs from glauca as follows: Mesonotum slightly polished, thinly olive-gray pruinose and marked with three indistinct black ones. Almost j^cATz^o^a, but in that species the mesonotum is almost opaque, not black vittated; the legs and abdomen are dark brown, and the female's legs are unciliated with scales. Black, the buds of the barbells yellow, the hairs white, many of them on the themasonotum, the ten marginal ones on the scutellum, those on the antennae, palpi, upper part of the occiput, vertex, tibia and tarsi.
Black, halteres and bases of femora yellow, bristles and hairs black; third antennal node four times as long as wide, about five times as long as style, proboscis slightly longer than head height; thorax dark, pruinose gray, mesonotum marked with three black vittii!, scutellum bearing six hairs, abdomen slightly smooth, almost glabrous, legs slender, nearly glabrous, first joint of hind tarsi numerous.
DIPTERA 419
420 COQUILLETT
DIPTERA 421
422 COQUILLETT
DIPTERA 423
424 COQUILLETT
DIPTERA 425
426 COQUILLETT
DIPTERA 427
428 COQUILLETT
DIPTERA 429
430 COQUILLETT
DIPTERA 431
432 COQUILLETT
DIPTERA 433
434 COQUILLETT
DIPTKRA 435
Brodie under the name Helophilus canadensis Brodie; this name appears in the published list of Insect Control of Canada, but no description accompanies the name, nor has it ever been published so far as I know. Male eyes widely separated as posteriorocelli, upper anterior half brownish black, lower half yellow brown, sides broadly yellow pruinose, face yellow, dark, yellow pruinose, deeply concave below antennae, lower part strongly convex, cheeks black brown smooth, antenna yellow to brown, upper side e.
DIPTERA 437
438 COQUILLETT
DIPTERA 439 from New Hampshire, southward to the District of Columbia, west-
440 COQUILLETT Family SARCOPHAGID^
DIPTERA 441
442 COQUILLETT
DIPTERA 443
444 COQUILLETT
DIPTERA 445
44^ COQUILLETT
DIPTERA 447
448 COQUILLETT
DIPTERA 449
450 COQUILLETT
DIPTERA 451 Hylemyia fabricii (Holmgren)
452 COQUILLETT
DIPTERA •153
454 COQUILLETT
DIPTERA 455
456 COQUILLETT
DIPTERA 457
458 COQUILLETT
DIPTERA 459 Family PSILID^
460 COQUILLETT
DIPTERA 461
462 COQUILLETT Parydra pauUula Loew
DIPTERA 463 tomyza have been rather vague and obscure, and in consequence the
464 COQUILLETT
