118 [August 



or less yellow exteriorly. Abdomen with the segments strongly con- 

 tracted at base, either black or ferruginous; first segment more trans- 

 verse than usual, with a yellow spot on each side, sometimes large and 

 nearly confluent, sometimes reduced to a dot ; second segment with a 

 large yellow mark on each side, also sometimes nearly confluent, and 

 sometimes reduced to an elongate oblique spot ; remaining segments 

 either entirely black, fuscous, or ferruginous with the incisures black. 

 and sometimes the basal middle of the segments stained with blackish ; 

 the venter black, sometimes ferruginous banded with black. Length 

 85 — 9^ lines; expanse of wings 12 — 142 lines. 



Hal). — New York (Angus) ; New Jersey and Pennsylvania (Cres- 

 son); '-Delaware, Georgia" (Smith); Louisiana (Kennicott). Coll. 

 Ent. Soc. Philad. and Chicago Academy of Sciences. 



Six 9 specimens ; % unknown. This is a fine large species, ex- 

 ceedingly variable in coloration. 



5. Cerceris biungulata. n. sp. 



Black : sides of the face, two spots on prothorax, tegulse, postscutellum. side^ 

 of metathorax, and the five basal segments of abdomen above, except a fer- 

 ruginous stain at base, yellow : clypeus with a large acutely lunate projection 

 proceeding from its base: wings hyaline, fuscous at tips. 



Femab'. — Black, closely and rather finely punctured, sparsely clothed 

 with a pale pubescence; clypeus with a large acutely lunate [irocess, 

 proceeding from its base, like two claws diverging from each other, 

 and connected at their bases ; sides of the face, the clypeal projection, 

 except its lateral and apical margins, base of the mandibles, a spot be- 

 hind the summit of the eyes, and the scape of the antenn;^ in front, 

 rather obscure yellowish ; margins of the clypeal projection, its under 

 surface, the cheeks, and the basal half of the autennaj, ferruginous; 

 the vertex, immediately behind the ocelli, has a few obsolete ferrugi- 

 nous dots. Thorax : two transverse spots on the collar, a small spot 

 beneath the anterior wing, tegulse, postscutellum. and a very large sub- 

 triangular mark on each side of the metathorax, yellow ; the scutellum 

 is tinged with obscure ferruginous ; the triangular basal space of the 

 metathorax is finely striated longitudinally ; wings obscure hyaline, 

 with a slight purplish iridescence, the co.^tal and apical margins nar- 

 rowly fuscous, darker on the apex of the anterior pair ; nervures fer- 

 ruginous. Legs fulvo-ferruginous; tips of the four anterior femora, 

 especially within, and the posterior pair exteriorly, as Avell as most of 

 all the tibiae, yellow. Abdomen yellow, the segments strongly con- 

 stricted at base, with a basal pale ferruginous stain, broader on the an- 

 terior segments, that on the basal segment separating the yellow into 



