154 [January 



posterior pair subhyaline, the costa broadly yellowish. Legs yellow- 

 ish, the anterior trochanters and femora dull ferruginous, the four pos- 

 terior coxa3, trochanters, femora and tips of posterior tibiae, piceous ; 

 posterior femora gradually dilated towards the tips with the apex trun- 

 cate and the margins reflexed, and when viewed endways it is circular, 

 the tibia? inserted on the inner side of the circle; the tibiae spinose ; 

 tarsal claws dusky. Abdomen dull ferruginous-brown, very minutely 

 punctured, subopaque; the first segment and the apical margins of the 

 four following segments, above and beneath, yellow ; apical segment 

 with its disk flattened and enclosed on each side by a longitudinal 

 carina, converging at base, and fringed with pale brownish pubescence, 

 the enclosed space finely rugose; the ventral segments clothed with 

 yellowish-sericeous pubescence, longer and more dense on the apical 

 margins. Length 7J lines; expanse of wings 12 lines. 



Male. — Resembles the female, but is smaller and slenderer; the head 

 is not so large, the clypeus not produced, but flattened, large and semi- 

 circular, the pieces on each side fringed with golden pubescence ; the 

 antennae are longer, the mesothorax is margined with blackish ; the 

 metathorax wants the two small approximate yellowish spots beneath 

 the triangular basal piece; the anterior femora at base and the four 

 posterior femora, are black ; the abdomen is narrower and more pube- 

 scent, the basal half of the first segment is dull ferruginous, and the 

 apical margin of the sixth segment is also yellow. Length 5j lines; 

 expanse of wings 9 lines. 



Collection. — Dr. J. Grundlach. Two specimens. 



Cerceris triangulata. n. sp. 



Ferruginous ; face, collar, spot beneath the wings, tegulse, scutellum, a large, 

 sublunular spot on each side of metathorax, legs, and the first and narrow apical 

 margins of the third," fourth and fifth segments of abdomen, yellow; basal tri- 

 angular piece on metathorax black; wings fusco-hyaline, costa pale yellowish ; 

 abdomen deeply and coarsely punctured. 



Female. — Head large, subquadrate, opaque, ferruginous, deeply and 

 closely punctured, slightly pubescent; face, cheeks, clypeus and basal 

 half of mandibles, yellow; when viewed from above, the lower part of 

 the face is bright silvery; clypeus elevated, short and convex above, 

 obliquely and broadly truncate, and flattened beneath; antennae fulvous. 

 Thorax opaque, dull ferruginous, deeply and closely punctured, pube- 

 scent; the collar, a spot beneath the wings, tegula?, scutellum, and a 

 large sublunular spot on each side of metathorax, yellow; tip of meta- 

 thorax dull ferruginous, the triangular enclosed basal piece black and 

 obliquely striated. Wings pale fusco-hyaline, darker at the apex along 



