J. R. MALLOCH 317 



postcro-dor.siil, and two to four postero-ventral bristles, the dorsal surface on 

 apical half and dorsal surface of basal joint of mid tarsus each with long setu- 

 lose hairs; anterior surface of hind femur with short, erect, setulose hairs, which 

 become longer on apical half of antero-ventral surface; hind tibia with a series 

 of erect setulose hairs on each of the following surfaces, antero-ventral, anter- 

 ior, antero-dorsal, posterior, and postero-ventral, postero-dorsal surface with 

 four widely placed slender l)ristles. Veins 3 and 4 convergent apicalh-; outer 

 cross-vein nearly straight. Length, 4 to 4.5 mm. 



Type.— 6" ; Grand Tower, Illinois, April 21 to 23, 1914, [Illi- 

 nois]. Paratypes. — 1 cf , topotypical; 2 cf, Lafayette, Indiana, 

 :\Iay 1, 1918, [Illinois]. 



This species bears a resemblance to trichodadyla Zetterstedt, 

 l)ut the hind femora are very much curved, and the armature of 

 the hind tibiae is quite different. 



Hylemyia fusciceps Zetterstedt 



1845. Aricia fusciceps Zetterstedt, Dipt. Scand., iv, 1552. 



The commonest and most widely distributed ant homy iid fly 

 in North America. Represented by sixty-seven specimens from 

 the following localities: Milbrae, Redwood Canon, Lagunitas 

 Canon, ]Mesa Grande, Sonoma Count}', Yosemite Valley, and 

 Berkeley Hills, all in California; Beulah, top of Las Vegas Range, 

 Alamogordo, Highrolls, East Las Vegas, and Cloudcroft, all in 

 Xew Mexico. 



Hylemyia sp.? 



One female resembling in most respects that of fusciceps Zetter- 

 stedt, but with fewer antero-dorsal bristles on hind tibiae. 



Locality; Huachuca Mountains, Arizona, August, 1905, (H. 

 Skinner). 



Subfamily Fucellinae 

 FUCELLIA H.-D. 



There are two species of this genus in the collection. One of 

 these is undescribed. 



Fucellia assimilis sp. n. 



Mdle and female. — Black, densely gray pruinescent. Head grayish testa- 

 ceous, becoming ochreous anteriorly, the entire face, anterior half of frons 

 and the cheeks reddish testaceous; third antennal joint and proboscis black. 

 Dorsum of thorax with three narrow brown vittae. Abdomen with a 

 blackish brown dorso-central vitta; bases of setulae and bristles each sur- 

 roimded In^ a black dot; fifth sternite testaceous in male. Legs black, 



TK.\XS. .\M. EXT. SOC, XLIV. 



