34 H. C. HUCKBTT 



entire inner border of each process; the outer surface of each process with numerous bristles. 

 Fore tibia with two median setulae and a sharp apical posteroventral setula. Mid femur with 

 a series of bristles along entire length of posteroventral suiface, which are considerably longer 

 and stronger proximad; the anteroventral surface with a few proximal setulae; mid tibia 

 with one anterodorsal, one posterodorsal, and two or three posteroventral bristles, all of which 

 are short. Hind femur with a series of bristles the entire length of the antero- and postero- 

 ventral surfaces, those of the posteroventral surface much weaker and shorter; hind tibia 

 with one anteroventral, eight or nine anterodorsal, and three posterodorsal bristles; the posterior 

 surface with a median series of setulae. Tarsi somewhat compressed; pulvilli elongate. Wings 

 with small costal thorns; m-ea cross-vein erect, sHghtly sinuous. Lower calyptra covered by 

 upper. Length, 4 mm. 



Female. — Lighter in color than male, subshining. Frontal vitta reddish cephalad. Thorax 

 nonvittate. Abdomen with indistinct dorsocentral fascia and transverse incisures. Legs 

 blackish. Wings hyaline. Halteres yellow. Eyes separated by a distance nearly equal to 

 length of second and third antenna! segments. Cruciate bristles present. Antennae larger 

 than in male, reaching oral margin; third antennal segment one and one-half times as long as 

 broad; arista minutely pubescent. Palpi slender. Thorax with a series of weak cruciate biistles, 

 irregularly paired; posthumeral bristles weakly dupHcated; pra shorter than posterior noto- 

 pleural bristle; sternopleural bristles, 2:2, the ventral bristle of each pair considerably weaker 

 than the upper. Fifth abdominal tergum with semi-erect discal setae; abdominal sterna with 

 no noticeable bristles as in male. Fore tibia with one anterodorsal and two posteroventral 

 bristles. Mid femur with an entire series of posteroventral bristles; mid tibia with one antero- 

 dorsal, one posterodorsal, and two posteroventral bristles. Hind femiu: with the anteroventral 

 bristles confined to the distal two-thirds, and with no seiies of posteroventral bristles; hind tibia 

 with one anteroventral, five anterodorsal, and three posterodorsal bristles, the posterior sur- 

 face without setulae. Tarsi missing in the specimen. Wings with ?w-cm cross-vein erect. Lower 

 calyptra entirely covered by upper. Length, 4 mm. 



Records. — 2 6 , C. U. exp. no. 1033, sub. 218; reared from chipping sparrow's nest; emerged 

 March 17, 1924. 3 9 , C U. exp. no. 1033, sub. 243; reared from robin's nest; emerged March 

 13, 1924. (CoUected by I. Dobroscky.) 



Type, allotype, and paratype. — In the Cornell University collection, Ithaca, New York. 



Hylemyia spizellae most closely resembles H. florilega and H. linearis 

 Stein in the markings of the abdomen and the bristling of the abdominal 

 sterna. The males of spizellae can be most readily distinguished from those 

 of florilega in having the posthumeral bristles strongly duphcated, the hind 

 femur armed with a series of posteroventral bristles, and the processes 

 of the j5.fth sternum with a noticeable series of longish, weak bristles on 

 their inner borders; and from the males of linearis in having the prealar 

 bristle short, in lacking the tuft of bristles on the third abdominal sternum, 

 and in the armature of the processes of the iSfth sternum. 



Hylemyia testacea Stein 



1849 AnthomyiaaemeneWaik. List Dipt. Brit. Mus., part 4, p. 937, 9. ? 

 1898 Hylemyia testacea Stein. Berl. Ent. Ztschr., (1897) vol. 42, p. 208,. no. 1. 



Localities.— 1 6 , Kinderhook, June 1, 1915; 1 6 , Ithaca, June 5, 1897; 16,19, June 22, 

 1920; 19, DurlandviUe, June 29, 1917; 19, Oswego, July 16, 1921. 6 specimens: 3 

 males, 3 females. Figures 20, 65, 100, on plates in this memoir. 



Hylemyia testacea Stein very closely resembles H. depressa Stein in 

 structure and in chaetotaxy, but not in color. The male genitalia and 

 the female ovipositor are exactly alike in the two species. 



