INSECUTOR INSCITLTJ MKNSTRUUS 185 



veins very dark. Front slightly broader than long, appearing 

 broader as the margin on the sides is more deeply excavated on 

 account of the large antennae. Lower pair of proclinate bristles 

 greatly reduced in size, upper ones moderately large, separated 

 by nearly one-third the width of the front; lower reclinate 

 bristles set close together near the eye, at almost the same 

 level ; upper row nearly straight ; ocellar tubercle and median 

 frontal groove well developed. Antennas considerably enlarged, 

 half as long as the eye, with a slightly pubescent arista one-half 

 longer than the height of the front ; cheeks each with a row of 

 six strong bristles extending from the lower angle toward 

 the antenna, the upper ones smaller, but still large. Mesonotum 

 with a pair of sharply dififerentiated dorsocentral macrochastae ; 

 scutellum broad and short, with four very long slender bristles, 

 placed as a pair close together at each posterior angle. Pro- 

 pleura with several strong bristles near the anterior coxa and 

 several very small ones just below the spiracle; mesopleura 

 with a patch of small bristles of equal size above. Abdomen 

 with a few scattered hairs and some more conspicuous ones on 

 the sides below. Hypopygium of moderate size, shining 

 toward the base ; anteriorly below with a dense transverse tuft 

 of very strong, straight, stiff bristles ; behind this on the 

 ventral surface with two longitudinal rows of delicate hooked 

 hairs extending to the apex ; above and on the sides, except at 

 base, minutely rugulose and finely hairy ; anal organ short and 

 stout, with a few very fine hairs. Legs slender ; front tarsi 

 strongly enlarged, the metatarsus slightly broader than the 

 widest part of the front tibia ; hind femora with a series of 

 delicate, but quite noticeable curved hairs along the lower 

 edge; setulse of hind tibiae fine and closely placed, more distinct 

 near the middle. Costa about two-fifths the wing length, its 

 cilia moderately long and rather closely placed on apical half, 

 shorter basally ; first section about one-third longer than the 

 second and third combined ; second nearly twice as long as 

 third; light veins but little curved, the fourth not recurved at 

 apex, the seventh long ; light veins all distinct, but not strong. 



