188 NEW NORTH AMERICAN ANTHOMYIIDAE (dIPTERa) 



Hylemyia attenuata sp. ii. 



Ija'p.—Bhick, slightly shining, covered with dense grayish pruincscence. 

 Head black, orbits, face and cheeks with whitish pruinescence.. Dorsum 

 of thorax faintly trivittate. Abdomen with a black streak in middle and 

 lateral checkerings of same color on dorsum of each segment, one si>ot on 

 each side at base of each segment appearing brown in certain lights. Legs 

 black. Wings grayish, the veins black. Calyptrae white, fringes black. 

 Halteres yellow. 



Eyes separated by less than width across posterior ocelli; parafacial widei- 

 than third antennal joint and over half as wide as height of cheek, the latter 

 with a few long marginal bristles, three of which are directed upwards; arista 

 apparently bare except under a high magnification. One long bristle on the 

 presuturai acrostichal area; prealar bristle minute. Abdomen very slender, 

 the segments, except the aiiical one, longer than broad; hypopygium small; 

 fifth sternite sparsely bristled. Fore tibia with one median posterior bristle, 

 the apical blunt bristle short; fore tarsus compressed, subequal in length 

 to tibia; mid femur with two or three bristles at base on antero-ventral sur- 

 face and six or seven on basal half of postero-ventral surface; mid tibia with 

 two or three posterior bristles; mid tarsus shorter than tibia, with long setu- 

 lose hairs on dorsal surface of basal joint, the next three joints dilated, each 

 with a stout, curved, sharp-pointed bristle at apex on posterior side, which 

 is longer than the joint upon which it is situated; hind femur with a series of 

 moderately long bristles from near base to apex on antero-ventral surface, 

 the postero-ventral surface with a series of short hairs; hind tibia with three 

 or four antero-ventral, three or four antero-dorsal and three long postero- 

 dorsal bristles, the posterior surface with six or seven short setulose hairs 

 above middle; hind tarsus subequal in length to tibia. Costal thorns minute; 

 outer cross-vein nearly straight; veins three and four slightly convergent. 

 Ijcngth, /i.Tii mm. 



Type. — cf ; Claremont, California, (Baker), [Illinois]. 



Hylemyia megacephala sp. n. 



Male. — Black, slightly shining, densely gray pruinescent. Head black, 

 orbits, parafacial and cheeks with white, almost silvery pruinescence, face 

 less conspicuously pruin(>scent ; interfrontalia when seen from above oj)aquc 

 black; antennae and palpi black. Thoracic dorsum with a narrow brown 

 stripe along bases of a(!rosti(!hals on anterior half, on each side of which, in 

 front of suture, is a narrow fuscous vitta, and between the dorso-centrals 

 and the intra-alars there is a broad, rather indistinct, interrupted fuscous 

 vitta. Abdomen with a narrow uniform black dorso-central vitta, th(> an- 

 terior margins of segments vciy narrowly blackened; hypopygium i)ruines- 

 cent. Legs black. Wings very slightly brownish, tlu^ outer cross-vein 

 slightly clouded. Calyptrae and halteres whitish yellow. 



Eyes at narrowest part of frons separated by over twice tlic width across 

 postei'ior f)celli; orbits almost lineai' abov(\ broadeneng below, I lie inter- 

 frontalia tlierelon' alnidst nnifoiin in uidlli, cacli ()rl)il with five incurved 



