128 [August 



Four 9 ; two % specimens. This is much more robust in propor- 

 tion to the size, than any of the other species, and the abdomen is more 

 contracted at base. 



23. Cerceris californica, n. sp. 



Black: face, two spots on collar, spot on tegulse, tibiae and bands on abdo- 

 men much attenuated in the middle, yellow; wings subhyaline, the costa fus- 

 cous; face silvery. 



Malt'. — Robust, black, deeply and rather closely punctured, subseri- 

 ceous, thinly clothed with a pale yellowish pubescence ; the face en- 

 tirely pale yellow, clothed with a short silvery pubescence ; mandibles 

 black ; antennas black above, fulvous beneath, the apical joint subconi- 

 cal, a little curved and tipped with fulvous. Thorax sparsely punc- 

 tured above, immaculate, except an ovate dull yellowish spot on each 

 side of the collar, and two very obscure ones of the same color on post- 

 scutellum ; enclosed basal space of the metathorax smooth and polished ; 

 tegulae fulvous with a yellow spot. Wings hyaline, with a brilliant 

 violaceous reflection especially at tips ; the costa, beyond the stigma, 

 broadly fuscous, as well as the apical margins faintly ; nervures ferru- 

 ginous. Legs brownish at base, the four anterior femora ferruginous, 

 the posterior pair rufo-piceous ; tibiae and base of tarsi yellow; tips of 

 posterior tibife and most of the tarsi fuscous. Abdomen robust, sub- 

 sericeous, the first segment unusually small, globose and tinged with 

 dull ferruginous at tip ; the second and three following segments each 

 with a narrow, apical, yellow fascia, much dilated on each side, the 

 sixth segment with a broad yellow band, the anterior middle slightly 

 emarginated ; beneath black, immaculate. Length 5 2 lines ; expanse 

 of wings 9 lines. 



i^(/i.— California. (Mr. Henry Ulke.) Coll. Ent. Soc. Philad. 



One S specimen ; 9 unknown. 



24. Cerceris Kennicottii, n. sp. 



Black; sides of face, clypeus, scape in front, interrupted line on collar, 

 tegulfe, a broad line on scutellum, tibire, broad band on second abdominal seg- 

 ment, transverse spot on each side of tliird, and narrow bands on three follow- 

 ing segments, yellow ; wings subhyaline, the costa fuscous. 



Ma/c. — Black, coarsely punctured, finely pubescent, silvery on tine 

 clypeus; sides of the face, middle lobe of the clypeus, and the scape 

 in front, yellow; antennae black, the flagellum fulvous beneath. Tho- 

 rax : a line on the collar, interrupted in the mid lie, tegul*. and a 

 broad transverse line on the scutellum, yellow ; the enclosed basal 

 space of the metathorax shining, with a deep channel down the mid- 

 dle. Wings dusky, with a violaceous reflection, the costa fuliginous; 

 nervures fuscous. Legs black ; tips of the femora, the tibije and tarsi. 



