131 



Genus BEACHYCOMA Rond. 



Brachycoma Rondaiii, Dipterologin' Italicjp Piodrojuus, Yo\. I, p. 69; 1856. 

 LaccoproNopa Towuseud, Trans. Amer. Ent. Soc, Vol. X VIII, \k o(i5; Deceiul>er, 1891. 

 /Sflr('o/at7(ine//(f Townseud, loc. cit., Vol. XIX, p. 110; 1892. 



A comparison of a cotype speciraeu of Laceoprosopa sarcophagina 

 (the type species of this gemis) kindly submitted by Mr. Charles Rob- 

 ertsou, of Garlinville, 111., with a specimen of Brachj/vonKi devia (the 

 type sjjccies of the latter genus) received from and identified by Brauer 

 and Bergenstamm, fails to disclose any difference of geueric impor- 

 tance; and the same is true in regard to si)ecimeiis that I identify as 

 Sarcotachinella intermedia Town. All of our species have only three 

 postsutural macrocha^ttie : 



1. Fourth segment of abdomen wholly black 3. 



Fourth segment largely yellow, abdomen destitute of discal macro- 



chtTeta', scutellum bearing three marginal pairs, bend of fourth 

 vein appendiculate 2. 



2. Sides of face each bearing a row of macrochictic, palpi black; 



length, 8 to 10 mm. Southern California. (Entomological 



Xews, Vol. Y, p. 172 ; June, 1894.) . . davidsoni Coq. 



Sides of face bearing short bristly hairs not disposed in rows, palpi 

 yellow; black, the palpi and fourth abdominal segment yellow, 

 antenme more or less reddish; front in the male one-half, in 

 the female almost, as wide as either eye, three pairs of orbital 

 bristles in the female, wanting in the male; cheeks two- thirds 

 as wide as the eye height; aiiteim;e five-sixths as long as the 

 face, the third joint one and two-thirds times as long as the 

 second, arista thickened on the basal fourth; abdomen gray 

 pollinose, the first three segments marked with a black dorsal 

 vitta and two subdorsal rows of black si)ots situated on the 

 hind margins of the segments; second segment bearing a small 

 marginal pair of macrocha'tie, the third and fourth each with a 

 marginal row ; front pnlvilli of male slightly longer than, of 

 the female two-thirds as long as, the last tarsal joint; wings 

 hyaline, third vein bristly almost halfway to the small cross- 

 vein, calypteres white; length, 7 to 8 mm. Connecticut and 

 Virginia. A single specimen of each sex, that from Virginia 

 collected by Theodore Pergande May 23, 1884. Type i^o. 3G38, 

 U. S. National Museum a^ncalis n. sp. 



3. Second and third segments of abdomen destitute of discal macro- 



ch.eta', thorax marked with three or five black vitta^ 4. 



Second and third segments bearing discal macroch;vta\ thorax 

 marked with four black vittte; black, the palpi and base of 

 third antennal joint yellow; front in female three-fonrtlis as 

 wide as either eye, two i^airs of orbital bristles, antenna' four- 

 fifths as long as the face, the third joint scarcely longer tJian 



