124 C. H. TYLER TOWNSKND. 



fully one-half width of head before ( 9 ), much narrower at vertex, 

 face nearly twice as wide as vertical width of front; frontal bristles 

 in a single row, descending nearly to base of third antennal joint, 

 short and weak, vertical bristles longer and directed backward, others 

 inward ; no orbital bristles in 9 . Face receding, epistonia not 

 prominent; facial depression about one-half width of face, much 

 widened below, somewhat triangular in outline, rather deep ; facial 

 ridges with a few bristles above vibrissse extending less than half 

 way up, considerably constricted below; sides of face wide, bare; 

 cheeks more than two-thirds of eye-hight, hairy posteriorly, bristly 

 on lower border ; vibrissie weak, not decussate, inserted nearly on 

 oral margin, hardly distinguishable amongst the other bristles. Eyes 

 bare, descending about three-fifths as low as oral margin. Antennse 

 nearly as long as face, inserted nearly on line drawn through middle 

 of eyes, second joint a little elongate, third joint about three and 

 one-half times as long as second, not wide, straight, posterior apical 

 corner well rounded ; arista rather short, bare, thickened basally, 

 tapering to point, jointed at base, basal joint short. Proboscis short, 

 fleshy, about one-half hight of head, labella large ; palpi slender, 

 thickened at tip.- Thorax as wide as head ; scutelluni with an apical 

 and two lateral pairs of macrochsetse, the apical pair scarcely reach- 

 ing base of second abdominal segment. Abdomen broader than 

 thorax, rounded oblong, first segment not shortened ; macrochaetse (?) 

 weak, only marginal. Legs moderately stout, including tarsi, not 

 very bristly; claws and pulvilli a little elongate ( 9 ). Wings hardly 

 as long as abdomen, rather narrow, without costal spine, third vein 

 spined more than half way to small cross-vein ; apical cell closed 

 and long petiolate, the third vein terminating considerably before 

 wing tip ; fourth vein bent at a right angle, with a stump of a vein 

 at the angle, apical cross-vein straight ; hind cross-vein straight, 

 nearly in middle between small cross-vein and angle of fourth, or 

 slightly nearer the sn)all cross-vein. Type, E. dakotensis n. sp. 



Euscopolia dakotensis u. sp. 9 —Eyes dark browu, frontal vitta 

 browu ; sides of front, sides of face and clieeks shining black, facial depression 

 brown ; anterior pair of ocellar bristles strongest, directed forward and strongly 

 outward: antennfe yellowish brown, the third joint blackish distally, arista 

 brownish yellow; proboscis blackish, palpi yellowish brown; occiput shining 

 black, with some very short black hairs. Thorax, scutellnin and abdomen shin- 

 ing black, macrochsetfe weak. Legs black, very little bristly, pulvilli fuscous. 

 Wings grayish hyaline, the costal border and portions along wing veins smoky ; 

 tegulse whitish, borders pale yellowish, halteres blackish. Length of body 6 

 mm. ; of wing 4 mm. 



