NO. 1938. THE DIPTEROUS FAMILY PHORID^—MALLOCH. 471 



dilated, hind tibiae strong, setulse indistinct at base and apex, those 

 (8-9) on central portion more distinct ; costa to middle of wing, first 

 division about one and one-fourth as long as second, third nearly one- 

 fourth as long as second, so that the first division is barely longer than 

 2 and 3 together, fringe of moderate length, very delicate and widely 

 placed, fourth vein curved at base, running nearly parallel with fifth 

 for two-thirds of its length, ending much in front of wing tip with an 

 upward curve; halteres brown. 



Length, 1| mm. 



One female, Mmatitlan, Mexico, February 1, 1892 (H. Osborn). 



Type.-O&t. No. 14858, U.S.N.M. 



APHIOCH^TA LUTEA Melgen. 



Yellow; frons sometimes darkened above, the antennae always 

 yellow, palpi normal; thorax pale yellow, scutellum with two bris- 

 tles; abdomen more or less brown or black on dorsal segments, the 

 anal protuberance rather short and broad, legs yellow, the apices of 

 hind femora darkened, hind tibial setulse delicate and regular; costa 

 to middle of wing, second division less than half the length of first, 

 fringe long and strong, fourth vein leaving at fork of third; halteres 

 yellow. 



Length, lJ-2 mm. 



There are several specimens in the collection that belong to this 

 species. One from Wisconsin is labeled as such by Brues, and there 

 are thfee from Delaware Water Gap, New Jersey, July 12 (no col- 

 lector's name or year), while a specimen from Eureka, California 

 (H. S. Barber), is, though larger and slightly different in some 

 minor characters, I believe, the same species. I have also seen it 

 from Ithaca, New York (O. A. Johannsen). 



APmOCH.«;TA OBSCURA Brues. 



Yellow; frons brown, the lower post-antennal bristles about one- 

 half the size of the upper pair; antennae brown, arista long, pubes- 

 cent, brown; thorax yellow, with a brownish tinge, pleurae yellow, 

 scutellum with two bristles; abdomen brownish black; legs yellow, 

 hind tibial setulae very small and indistinct; wings grayish, costa 

 to middle, first division about one and one-half times as long as 

 second, fringe of only moderate length and not strong, rather widely 

 placed, fifth and sixth veins very distinctly convergent at middle, 

 halteres brown. 



Length, 1 mm. 



I have only seen the type specimen in the museum. 



Locality, St. Vincent, West Indies. 



