NO. 1938. THE DIPTEROUS FAMILY PHORID^—MALLOCH. 447 



as thick as the tibia; the legs all yellow, hind femora fringed at base 

 with rather long soft hairs, hind tibiae distinctly, but finely setulose 

 on postero-dorsal surface. 



Length, 2^ mm. 



One male taken in U. S. National Museum, Sept. 3, 1912, evi- 

 dently belongs to this species, though the fore tarsi are both broken 

 off. (H. L. Viereck.) 



APmOCH.«;TA CALIFORNIENSIS, new species. 



Male and female. — Brownish black; frontal bristles strong, post- 

 antennal bristles of almost equal size; antennse brown, rather large, 

 aresta slightly pubescent, palpi yellow, normal size, strongly bristled, 

 mesopleura bristly, scutellum with four equally strong bristles, hal- 

 teres brown, second abdominal segment but little longer than third, 

 not noticeably bristled laterally, anal protuberance of male brown, 

 small, o\dpositor of female not exserted, inconspicuous, wings 

 fuscous, veins brown, costa fully to middle of wing, first division at 

 least three times as long as second, fringe of moderate length, fine, 

 and rather loose, legs brownish yellow, fore legs paler, fore tarsi 

 thickened, metatarsi rather wider than tibiae, hind tibiae cihated on 

 postero-dorsal surface with very weak setulse. 



Length, 2 mm. 



This species is very distinct from the other two in this group in 

 color, neuration, and in having the metatarsi more dilated than in 

 either. The only other species that it can be confounded with is 

 palmeni Becker, but that species has the antennae very much enlarged, 

 conical, and almost as large as the eye in the male. 



One male, one female, Fieldbrook, Humboldt County, Cahfornia, 

 May 30, 1903 (H. S. Barber). Mounted on same card. Standing 

 among the duplicates of A. rufipes Meigen. 



Type.— C&t. No. 14840, U.S.N.M. 



Genus APHIOCH^ETA, Group C. 



TABLE OF SPECIES. 



1. Frona very narrow, twice as long as broad, highly polished, and punctured 2. 



Frons about one-half longer than its breadth, the post antennal bristles very 



small 3. 



Frons but little if any longer than broad, the post-antennal bristles large 5. 



2. Scutellar bristles of equal size, hind margin of throax and base of scutellum black. 



longifrons, p. 449. 

 Anterior pair of scutellar bristles much reduced in size, throax and scutellum yellow. 



epeiras, p. 450. 

 :3. First section of costa about equal to the other two together; entirely black except legs. 



halictorum, p. 450. 



First section of costa much longer than the other two together; or species mostly 



yellow 4. 



