546 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 90 



horizontal, with a distinct median line, deeply cut out behind, the 

 sides forming rounded vertical lobes; stigma situated at about half 

 the length of propodeum. Abdomen rather long, longer than head 

 and thorax together, distinctly compressed, strongly so on the apex ; 

 a slight trace of a depressed line on second sternite near its base. 

 Front coxae as well as middle and hind tibiae and femora show small 

 spines in pits; there are no other spines on the long and slender 

 legs; long spur of hind tibia somewhat longer than half of the basi- 

 tarsus. In the fore wing the radial cell conspicuously long and 

 slender; other venation as the figure indicates. Anal vein in hind 

 wing interstitial with cubital. 



Length, 14-24 mm. ; wing spread, 29-40 mm. ; length of fore wing, 

 13-19 mm. 



Male. — Head black ; yellow areas : Face below and between anten- 

 nae, clypeus, labrum, a triangular spot at base of mandible, broad 

 inner orbits not reaching the vertex and narrow outer orbits, pos- 

 terior border of pronotum and two large spots on its sides, seventh 

 sternite, front coxae on their outer side, and front legs with excep- 

 tion of a black stripe on upper side. Fore wings fuscous with hyaline 

 base ; hind wings hyaline with fuscous apical half. 



Head shorter and broader than in female ; eyes more sinuous in the 

 middle; labrum more tipped and vertex not elevated behind ocelli; 

 distance between hind ocelli much greater than their distance from 

 the eyes. Pronotum and propodeum less prolonged, propodemn 

 showing a considerable amount of silvery pubescence. Abdomen flat- 

 tened, especially at apex, where fourth and fifth sternite show some 

 longer dark hairs. Fifth and sixth sternite emarginate in the middle. 

 Subgenital plate prolonged and rounded with an elevation in the 

 middle at the base, which gradually disappears against the apex. 

 Genitalia as shown in figure. 



Length, 12-12.5 mm. ; wing spread, 23-24 mm. ; length of fore wing, 

 11-12 mm. 



Type locality. — Suifu, Szechwan, China. 



Holotype, allotype.^ and paratypes. — U.S.N.M. No. 54066. Holo- 

 type: Female, Suifu, Szechwan, China, D. C. Graham, collector. 

 Allotype: Male, Szechwan, China, September 12-22, 1934. Para- 

 types: Female, Maan Chi Shaon, China, October-December 1921, 

 C. W. Howard, collector; female, Soochow, China, N. Gist Gee, col- 

 lector; female, Kuanshien, Szechwan, China, August 6-7, 1934, 3,000 

 feet, D. C. Graham, collector; male, Kuanshien, Szechwan, China, 

 September 12-22, 1934, 3,000 feet, D. C. Graham, collector; female, 

 Yen-ping, China, July 26, 1917. The last paratype listed, from 

 Yen-ping, is deposited in the American IVIusemn of Natural History. 



U. S. GOVERNMENT PRINTING OFFICE: 1641 



