SARCOPHAGA AND AIXIES 183 



Abdomen with the usual tessellation and three 

 indistinct changeable stripes; the hind edge of the 

 fourth segment yellow, more broadly below ; first and 

 second segments with only lateral bristles, third with 

 a pair of strong median marginals, fourth with an un- 

 even row of about 16, mixed with some coarse hairs. 



Hj^popygium yellow; first joint rather large, 

 slightly pollinose above, with an interrupted row of 

 six or eight slender, small bristles along the hind 

 margin; second segment globose and shining, with 

 erect hairs but no bristles. The forceps are strongly 

 curved forward near the tip, not diverging, the basal 

 part yellow and stout; tip black, sharp, but not 

 toothed; accessory plate ovate, yellow, evenly cov- 

 ered with long hairs; posterior claspers brownish to- 

 ward tip, rather straight, with a blunt hook at apex; 

 anterior claspers yellow, nearly straight, grooved un- 

 derneath and not much curved at tip ; penis with slen- 

 der yellow basal segment, the distal one large and 

 mostly black ; on each side there is a prominent square 

 shoulder about the middle of the back and in front 

 of this a smaller elevation bearing a long slender 

 hook; near the apex on the back are a pair of trans- 

 parent yellow thin margins ; at the tip is a large tubu- 

 lar opening which seems to be double like the nos- 

 trils of an animal. Fifth sternite yellow, V-shaped, 

 with stout black brush on each side intermingled with 

 a few longer bristles. 



Legs yellow, including all the eoxve, the tarsi 

 look darker principally because of the dense covering 

 of black hair; the hind tarsi are noticeably shorter 

 than the tibiae; middle femur without comb; middle 

 tibia with two bristles on outer front side; both mid- 

 dle and hind tibiae villous ; hind femur and tibia both 

 somewhat curved. 



Wing hyaline, no costal spine; third segment of 

 costa about equal to fifth and sixth together ; first vein 

 bare, third with small hairs more than halfway to 

 crossvein. 



Length 11 mm. 



