410 Mr. F. Smith on new Species 



fnlvo-hyaline. Abdomen black above, with a narrow yellow 

 line on the apical margins of the segments, the first segment 

 ferruginous above. 

 Hab. Mexico. 



Cerceris exsecta. 



Female. Length 8 lines. Black, sparingly variegated with 

 bright yellow spots and bands ; the clypeus elevated and 

 deeply emarginate anteriorly ; a broad oblong spot on each side 

 of the face, the anterior half of the clypeus and a central line 

 running nearly to its base, a minute spot between the antennas, 

 a narrow longitudinal line on each side of the vertex above 

 the eyes, and the mandibles yellow ; antenna? ferruginous and 

 more or less fuscous above. Thorax : an interrupted line on 

 the pro thorax, a spot on the tegulas, another on each side of 

 the scutellum and also of the metathorax posteriorly and the 

 postscutellum, yellow ; tibiae and tarsi variegated with yellow 

 and ferruginous, the posterior pair blackish above ; wings 

 fusco-hyaline, the nervures ferruginous. Abdomen : the first, 

 third, and fourth segments with narrow marginal fascia?. 



Male. Smaller than the female ; closely resembling it, but 

 differing as follows : — the clypeus not elevated, and entirely 

 yellow, the scape yellow in front ; the posterior trochanters 

 yellow, and the apical margins of all the segments, except the 

 second, with narrow yellow fasciae. Both sexes have a 

 quadrate yellow spot on the underside of the first segment. 



Hab. Mexico. 



Cerceris gra/phica. 



Female. Length 7 lines. Head and thorax black, spotted 

 with yellow ; abdomen ferruginous, with yellow bands. Head : 

 the clypeus, a narrow line running halfway up the inner margin 

 of the eyes, and the mandibles yellow ; the latter black at 

 the tips ; a narrow line behind the eyes which runs back- 

 wards to the margin of the vertex before reaching their summit, 

 the scape of the antennas, and four or five of the basal joints 

 of the flagellum ferruginous. Thorax : a transverse spot on 

 each side of the prothorax, a spot on the tegula? and a small 

 one beneath them, two ovate spots on the scutellum, two 

 minute ones on the postscutellum, two central ones on the tri- 

 angular enclosed space at the base of the metathorax, a line 

 on each side of the metathorax, which widens posteriorly into 

 a large macula ; the legs ferruginous, with yellow tarsi ; the 

 coxa?, trochanters, and a line beneath the femora black. 

 Abdomen : the sides of the basal segment yellow, and a narrow 

 yellow fascia on the apical margins of the third, fourth, and 



