NO. 1938. THE DIPTEROUS FAMILY PHORIDM—MALLOGH. 481 



There are four specimens from Williams, Arizona, that appear to 

 be identical with the two from Plummers Island, and though they 

 may not belong to this species I can not find any reliable character 

 for separating them. 



APmOCH^TA ATOMELLA, new spedos. 



Plate 37, fig. 6. 



Very similar to divergens, but the frons is shorter, being only about 

 as long as broad, and is gray dusted in front, the arista is shorter and 

 more distinctly pubescent; the costa extends nearer to wing middle, 

 is much longer fringed, and has the first division less than twice as 

 long as other two together; the fourth and fifth veins are nearly 

 parallel for about the basal half of their course, and the fourth is 

 slightly recurved at margin. Otherwise as divergens. 



Three males, Popoff Islands, Alaska, Harriman Expedition (T. 

 Kincaid); one male, Oxbow, Saskatchewan, Canada (F. Knab). 



Type.—Csit. No. 14875, U.S.N.M. 



This is the species included in Papers from the Harriman Alaska 

 Expedition,^ as PTiora fungicola Coquillett, by D. W. CoquiUett. It 

 is very different from that species. 



APmOCHiETA SUBATOMELLA. new species. 

 Plate 41, fig. 5. 



Male. — Similar in most respects to atomella, but the frons is broader, 

 the abdomen is deep black, opaque, with narrow pale hind marginal 

 bands to segments; the hypopygium is large, subshining, brownish 

 black, the ventral surface of last segment has some distinct bristles 

 at apex. The costa extends to two-fifths the length of wing; the 

 first division is two and one-half times as long as the other two to- 

 gether; the third is two-thirds as long as second, and the size of 

 the insect is larger, being 1^ mm. 



One male, Ithaca, New York (O. A. Johannsen) . 



Type.—Csit No. 14876, U.S.N.M. 



Three specimens from Kaslo, British Columbia (R. P. Currie), 

 seem to belong to this species, but are not in good condition for 

 examination. 



APHIOCH.ffi;TA CILIATA Zetterstedt. 



Black; frons distinctly shining, longer than broad, lower pair of 

 post-antennal bristles reduced, about one-fourth less than size of 

 upper pair, antennas brown, arista rather short and thin, but little 

 longer than frons, nearly bare, palpi yellow, normal; thorax slightly 

 shining, mesopleurse with several short bristles and one very long 

 and strong backwardly-directed one, abdomen rather broad and 



1 Proc. Wash. Acad. Sci. (Dlptera), 1900, p. 437. 

 48702°— Proc.N.M. vol.43— 12 31 



