SARCOPHAGA AND ALLIES 215 



the membrane connecting the first and second seg- 

 ments above also darkened; a row of bristles near 

 hind edge; second segment red, shining^ globose, 

 without bristles; forceps black, brownish on the long 

 and wide attached part; free part long, tapering, di- 

 vergent, gently curved forward to a sharp point; 

 accessory plate brown, large, rounded at tip; pos- 

 terior clasper blackish, slender, strongly curved for- 

 ward to a sharp tip, with a distinct hair on front edge ; 

 anterior clasper red, long and low, nearly straight 

 near tip; penis blackish; basal joint large and flat, 

 darker than usual; distal segment wide, shining, at 

 its tip with two shining black transverse arms which 

 curve around forward and make an almost perfect 

 ring, very characteristic; they overlap a little at the 

 tips which are divided into two points; before these 

 arms on the front side are two diagonal transparent 

 plates, and between these a transverse blackish plate 

 bearing a black claw on each outer angle. Fifth 

 sternite widely excised, brown, with a long tuft of 

 bristles on each arm where it turns laterally. 



Legs black; middle femora with dense row of 

 bristles below both anteriorly and posteriorly, but 

 hardly stubby enough to be called combs ; middle tibia 

 distinctly beyond middle, and with two bristles on the 

 outer front side; hind tibiee with dense and long vil- 

 losity. 



Wings subhyaline; no costal spine; third costal 

 segment longer than fifth and sixth together; first 

 vein bare, third hairy halfway to the crossvein, which 

 is slightly infuscated. 



Length 11% to 15 mm. 



Eleven males: five from East Eddington, 

 Maine (Hough) ; two from New Bedford, Mass. 

 (Hough) ; one from North Saugus, Mass. (D. H. 

 Clemons, in National Musuem) ; one Seattle, Wash. 

 (Hine) ; one Kanaka Bay, Friday Harbor, Wash.; 

 and one from Moscow Mt., Idaho, the last two in 

 my collection. 



