SARCOPHAGA AND ALLIES 257 



halfway; palpi yellow, rather long and stout; pro- 

 boscis black; bucca one-third the eyeheight, with 

 black hair in front of the suture, whitish behind ; back 

 of head with three rows of black hairs. 



Thorax wath rather glaucous pollen, with three 

 to five black stripes; ps dc four; ant acr distinctly 

 developed; prsc one; stpl three; scutelhmi with two 

 or three marginals, one rather large preapical and 

 one rather large apical. 



Abdomen gray pollinose, tessellated; first and 

 second segments with only lateral bristles, the third 

 with median marginal pair and one lateral; fourth 

 slightly red on hind margin with a row. of about a 

 dozen decreasing on the sides ; fifth sternite large and 

 distinct; near the base with tw^o prominent broM^n 

 lobes, which have a brush of black bristles on the inner 

 hind side; beyond these lobes the organ is cut out in 

 a semicircle in profile and the brush continues along 

 the inner edge of this semicircle, but is not visible in 

 profile ; there is a rounded lobe beyond tlie excision. 



Hypopygium red, rather large; first segment 

 pollinose above, tessellated, with a row of strong bris- 

 tles behind; second segment globose, subshining, with 

 abundant erect hair; forceps reddish brown, slender, 

 tapering, tips black; viewed from behind they stand 

 somewhat apart from each other basally and this 

 space is suddenly widened about the middle; on the 

 outer side near the base there is a deep oblique notch. 

 In profile the free part l^ends strongly backward for 

 about half its length, then becomes slender and curves 

 gradually forward to a sharp point. Accessory plate 

 very slender, almost finger-like, yellow; posterior 

 clasper small, yellow except the tip, which is curved 

 forward and divided into two points; anterior clasper 

 minute, witli black, one-sided tip; penis moderately 

 small, brown, basal joint distinct but short, the dis- 

 tal segment with a keel-like hind margin which ex- 

 tends in a curve over the tip into a pronounced free 

 hook turned forward; the basal part of the segment 

 is triangular in cross section, being flat in front ; from 



