170 THOMAS SAY FOUNDATION 



No. 78. Sarcophaga houghi n. sp. 



Male. Front .181 of head (average of five,— 

 .174, .177, .178, .188, .188); parafrontals and para- 

 facials silvery, the latter with the usual row of bris- 

 tles, coarser below; frontal bristles about 12, rapidly 

 diverging below, reaching about to the middle of the 

 second antennal joint; antennae black or dark brown; 

 third joint twice the second, reaching fully three- 

 fourths of the way to the vibrissse, which are at the 

 oral margin ; arista with the usual plumosity for three- 

 fifths of its length; palpi and proboscis black; bucca 

 one-fourth the eyeheight; back of head with three 

 rows of black hairs and considerable pale beard ; outer 

 bristles not differentiated; ocellars slender, but near- 

 ly as long as the frontal bristles. 



Thorax whitish pollinose, with the usual 3 to 5 

 black stripes ; ps dc four, of which the foremost two are 

 slightly smaller; ant acr not distinctly differentiated 

 fvom the erect hairs of the surface, the last pair be- 

 fore the suture slightly noticeable ; prsc one pair slen- 

 der but of moderate length ; stpl three ; scutellum with 

 two marginals, a slender pair of preapicals and a pair 

 of rather large apicals. 



Abdomen whitish pollinose, almost silvery, with 

 three changeable stripes, of which the middle one is 

 fairly permanent and somewhat shining; the surface 

 has the usual tessellation; first and second segment 

 with only lateral bristles ; the third with a broadly in- 

 terrupted row of about 10 and the fourth with a row 

 of about 16. 



Hypopygium black; first segment of moderate 

 size, gray pollinose, with erect hairs, a few along the 

 hind border rather larger, almost bristle-like; second 

 segment subshining, perceptibly pollinose, with erect 

 hairs, some of which are almost bristle-like. Forceps 

 small, brownish black, in profile slightly curved, but 

 little tapering, the apex very blunt, bearing a minute 

 tooth in the middle; viewed from behind they taper 

 quite rapidly and are not divergent; accessory plate 

 rather triangular with rounded corners, the hind side 



