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PROCEEDINGS OF THE NATIONAL. MUSEUM 



vor. 84 



bristles three; propleura, mesopleiira, and pteropleura bare; sterno- 

 pleural bristles three, the median bristle just below and slightly an- 

 terior to the hindmost bristle; scutellum with two long marginal 

 bristles, the apical bristles longer. 



Abdomen gray pollinose, with a narrow mid-dorsal black stripe 

 and with abundant erect hairs; sternites laterally with longer hairs 

 in series; hypopygium (fig. 19) of moderate size, black, internal 

 morphological features as illustrated. 



Wing hyaline; costal spine present; upper squama longer than 

 lower, rounded, whitish, yellow on rim ; veins 3 and 4 slightly diver- 

 gent at apex ; out^r cross vein almost straight. 



Figure 19. — Hylemya ahdena, new species: a. Left lateral view of male terminalia; 

 b, rear view of male forceps ; c, sternites of male. 



Legs black; anterior femur with complete i)osterior and anterior 

 dorsal rows of bristles, a scattered series of setalike hairs posteriorly 

 which are not in rows, and a series of bristles basally on the posterior 

 ventral surface; anterior tibia with one long subapical dorsal bristle 

 and a shorter bristle near apical third, two posterior ventral bristles, 

 the first near the middle, the second curved and sharp, situated almost 

 apically; anterior basal tarsal segment with a short basal ventral 

 fringe, the first bristle the longest ; middle femur with a short basal 

 row of four long ventral bristles, one anterior ventral bristle near the 

 basal third, an apical posterior dorsal series of three bristles, a 

 complete row of shorter anterior bristles; middle tibia with one 

 posterior dorsal bristle, one anterior dorsal and two posterior ven- 

 tral bristles; hind coxa without hair posteriorly; hind femur with 

 two apical dorsal bristles, a complete row of bristles posteriorly 

 which are scattered basally, one long and strong subapical posterior 

 bristle, a short apical anterior dorsal row of bristles, a short apical 

 row of about three bristles posterodorsally, a complete row anteri- 

 orly, a short apical row anteroventrally. and one fairly long ventral 

 bristle near the base; hind tibia with three posterior dorsal bristles, 



