106 Mr. F. Smith on new Species 



of the other joints, ferruginous ; mandibles ferruginous, with 

 a yellow spot at their base. Thorax : an interrupted line on 

 the postscutellum and the tegulae reddish yellow ; wings fusco- 

 hyaline, with a dark fuscous stain along the anterior margin 

 of the superior pair; the anterior legs ferruginous; of the 

 other pairs the tibiae and tips of the femora beneath are yellow, 

 the posterior tibiae being more or less black ;. the basal joint of 

 the tarsi white, the other joints more or less rufo-fuscous. 

 Abdomen : a minute spot on the basal segment and the apical 

 margins of the second, fourth, and fifth segments with narrow 

 yellow fasciae. The insect covered with strong confluent 

 punctures. 



Hob. St. Paulo. 



The markings of this species are evidently variable : of two 

 examples only, one has a minute yellow spot behind the eyes, 

 and also a very narrow interrupted line on the collar. 



Cerceris modestus. 



Female. Length 4~- lines. Black, and adorned with bright 

 yellow markings. Head : a yellow line at the inner margins 

 of the eyes, widening towards the base of the clypeus, which 

 is also yellow and elevated ; the base of the mandibles and a 

 spot behind the eyes yellow ; the antennae fulvous beneath. 

 Thorax : the collar, a spot beneath the wings, the tegulae, 

 scutellum, two spots on the postscutellum, and another on each 

 side of the metathorax above yellow ; wings hyaline, iridescent, 

 and with a dark fuscous stain in the marginal cell, which ex- 

 tends to the apex of the wings ; the nervures dark fuscous ; 

 the tibiae with a yellow line outside ; the legs dark rufo-piceous. 

 Abdomen : the second segment yellow, except its extreme 

 base ; the apical margins of the other segments yellow, the 

 apical one entirely so. The head and thorax strongly punc- 

 tured, the abdomen sparingly so. 



Hab. Ega. 



Cerceris nigriceps. 



Female. Length 4 lines. Head black, and also the three 

 apical segments of the abdomen ; otherwise of a reddish yellow. 

 Head : the face yellow, and with a pale golden glittering 

 pubescence ; a short conical tubercle at the base of the clypeus ; 

 mandibles yellow, with their tips black ; the scape and four 

 basal joints of the antennae ferruginous, the following joints 

 ferruginous beneath. Thorax : the postscutellum yellow ; the 

 tarsi and front of the tibiae and femora, as well as the coxae 

 beneath, yellowish ; wings subhyaline, iridescent, and with a 

 fuscous stain along the anterior margin of the front wings ; 



