96 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 54, 



the ventral plates can not be seen. The genital segments are mounted 

 on a cardboard point and pinned with the specimen. 



SARCOPHAGA KNABI, new species. 



Holotype. — Male, United States National Museum (No. 21500). 

 Paratype. — United States National Museum (No. 21500), one male. 

 Length. — 10-12 mm. 



Male, Jiead. — Parafrontals and genae dull brassy to bright golden 

 pollinose, also posterior eye orbits. Breadth of front at narrowest 

 part slightly more than one-half eye width; cheek height approxi- 

 mately two-fifths that of eye. Front not prominent; frontal vitta 

 at narrowest part of front about twice width of each parafrontal, its 

 sides slightly converging backward. Second an- 

 tennal segment dark; third about twice length of 

 second; arista plumose to beyond middle. Back of 

 head somewhat convex, with one row of black 

 cilia behind eyes, otherwise clothed with whitish, 

 yellowish hair that completely covers metacephalon. 

 Cheek clothed with whitish or yellowish hairs. 

 Gena with row of small hairs close to lower eye 

 riG.4.-SARcopHAGA orMt. Palpi dark. 

 KNABI. (Same LET- CJiaetotaxif. — Lateral verticals may be weakly 



TERING A3 IN FIQ. 1.) , ^ .- . . ^ , ,. •^.^, , 



developed; vibrissae mserted on Ime with oral mar- 

 gin; each row of frontals scarcely if at all extending below base of 

 vitta, the lowermost pairs a little divergent. 



Thorax. — Mesonotum clothed with short reclinate bristles. Spi- 

 racular cover very light colored. 



Wings. — Bend of fourth vein a right or slightly acute angle; 

 anterior cross-vein under middle of section III of costa; latter 

 equal to at least sections V and VI; third vein bristly; costal spine 

 vestigial; calypters whitish, margins fringed with white hair. 



Legs. — Dark. Posterior femur clothed beneath with short, fine 

 hair that ends posteriorly in a row of bristle-like hairs; upper row of 

 bristles of anterior face complete, intermediate row represented by a 

 few bristles centrally, lower row of short, well separated bristles; 

 tibia with anterior and posterior beards of long, slender hairs, latter 

 somewhat the stronger; anterior face without bristles (except near 

 median dorsal ridge); tarsus shorter than tibia. Middle femur 

 clothed beneath with short, fine hair; anterior, ventral row of short 

 bristles complete, posterior row represented only by "comb"; sub- 

 mesotibial bristle present; anterior coxa with irregular row of 

 bristles at each side only. 



Chaetotaxy. — ^Anterior dorsocentrals weak, about as strong as 

 anterior postsuturals ; acrostichals and inner presuturals absent; 

 only last two pairs posterior dorsocentrals strong, anterior to these 



