84 THOMAS SAY FOUNDATION 



lower row on the outer side and with two long ones 

 in the middle row near the tip; the upper row is prac- 

 tically complete. Both middle and hind tibia? have 

 erect villosity which is especially long and striking on 

 the hind ones. 



Wings hyaline, no costal spines; third segment 

 of costa slightly longer than fifth; first vein bare; 

 third with a few hairs at base; anterior crossvein 

 slightly clouded. 



Length 14 mm. 



Two males: Naguabo, Porto Rico, Mar. 7-9, 

 1914. (Amer. Mus. Nat. Hist.). 



Holotype. — Male, in American Museum of Nat- 

 ural History. 



Paratype.— Male, No. 20499, U. S. N. M. 



No. 31. Sarcophaga cessator n. sp. 



Male. Front, .192 of head (average of four, — 

 .181, .183, .187, .217) ; frontal stripe with whitish re- 

 flection, wider than side ; paraf rontals and paraf acials 

 silvery with a slight yellow tinge, with changeable 

 spots near base of antemicT?; paraf acials with row of 

 slender rather long hairs next to eye; antenna? dark 

 brown, reaching fully three-fourths of the distance to 

 vibrissa?, the third joint 2l/^ times as long as second; 

 arista of medium length, plumose to the middle; vi- 

 brissa? at oral margin ; small hairs ascending the facial 

 ridges half way to base of antenna?; palpi long, slen- 

 der, black ; proboscis very short, black ; bucca over one- 

 third the eyeheight; occiput with three series of black 

 hairs behind the eye; beard rather abundant, white; 

 outer vertical bristle not differentiated. 



Thorax with .5-7 stripes when viewed from be- 

 hind, the two intermediate pollinose stripes usually 

 present being in tliis case divided each by a narrow 

 black stripe; three pairs of anterior acrostichals, pre- 

 scutellars large ; 3 ps dc ; 3 stpl ; scutellum with 2 large 

 marginal, 1 small suba^^ical, and 1 small apical. 



Abdomen black, strongly tessellated with gray 

 pollen, still there are indications of three dark stripes 



