AUT. 9 TWO-WINGED FLIES OF TRIBE MILTOGEAMMINI ALLEN 69 



sexes; one pair of proclinate ocellars; vil)rissae located near front 

 edge of oral margin, not noticeably approximated; facial ridges 

 with a few scattered hairs on the lowest fourth or less; lunule con- 

 spicuous, shield shaped, situated in a deep indentation of the frontal 

 vitta; antennae extending nearly to level of vibrissae; plumosity of 

 arista not longer than its greatest diameter, penultimate joint 

 scarcely longer than wide; in profile, head length at oral margin is 

 much less than at base of antennae, epistoma not prominent; para- 

 facials bare or beset with black bristly hairs; bucca and back of 

 head with black bristly hairs except for sparse white hairs at sides 

 and back of oral cavity; proboscis stout, much shorter than head 

 height, labella fleshy; palpi normal; eyes with the facets at extreme 

 front but slightly larger than those at the sides. Thorax with three 

 strong postsutural dorsocentr<il bristles and two strong sternopleurals; 

 scutellum with three marginal pairs. Abdomen elongate conical; 

 intermediate segments each with a row of three large spots which 

 are sometimes confluent posteriorly; the basal pollinose band, 

 when present, is always scalloped on the posterior margin as if 

 formed by the coalescing of large spots. Genitalia of m.ale (pi. 1, 

 fig. 6) in repose, scarcely protruding; of female, nonpicrcing and 

 retracted. Wings with apical cell open; fourth vein at bend with a 

 distinct fold; last section of fifth vein varies from nearly half to 

 slightly more than half the length of preceding section; tliird vein 

 with row of small bristles extending more than half the distance 

 from base to small cross vein; a strong costal spine usually present. 

 Pulvilli of both sexes rather short; front tarsus of male (pi. 3, figs. 15, 

 16) usually ornamented with a peculiar brush of long hairs; of female 

 (pi. 3, fig. 17) strongly flattened; middle tibia with one bristle on 

 outer front side near the middle; hind tibia, on outside with a com- 

 plete uneven row of bristles. 



After study of the North American material and comparison with 

 European specimens of the genotype nasuta, it becomes evident that 

 the common species long recognized as Hilarella fulvicornis Coquil- 

 lett and three closely related species described in this paper are much 

 more closely allied morphologically to nasuta, than to hilarella, the 

 genotype of Hilarella. The genotype of Phrosina not seen and its 

 present location not known to me. The genotype fulvicornis of 

 Euhilarella has been compared with specimens of nasuta loaned by 

 Professor Bezzi. From the genus Eumacr onychia, with which it has 

 been confused, Phrosinella may be distinguished by the possession of 

 spots instead of even bands on the abdomen, and in having the elon- 

 gate lunule conspicuously imbedded in a sinus of the frontal vitta, 

 the fore tarsus of the male usually bearing a coiis])icuous tuft of long 

 bristly hairs, and that of the female without tufts of bristly hairs but 

 usually strongly flattened. 



