HYMENOPTERA. 461 



low ; the siibcordate sjiace at the base of the mctathorax longi- 

 tudinally striated ; the apex of the coxa3, the intermediate and 

 posterior trochanters, and the apex of the anterior pair, yellow ; 

 the anterior and intermediate tibia3 and tarsi yellow, the tibifE 

 with a dark stain behind ; the posterior tibia3 yellow beneath ; 

 wings hyaline, the anterior pair with a fuscous cloud at their 

 apex. Abdomen : the third segment yellow, with the extreme 

 base black ; the three following segments with a narrow yellow 

 band on their apical margins ; a yellow spot on the a])ical seg- 

 ment at its base. 



Hab. Brazil (Villa Nova). (Coll. H. W. Bates.) 



94. Cerceris rugosa. B.M. 



Female. Length 4 lines. — Black : coarsely punctured, the 

 punctures on the disk of the thorax running into longitudinal 

 striee, on the abdomen they are large, deep, and confluent ; the 

 face, mandibles, and scape in front, yellow ; the face covered 

 with silvery pubescence ; the flagellum fulvous beneath, the apical 

 joint entirely so. Thorax : a yellow line on the posterior margin 

 of the scutellum ; the anterior and intermediate tibia3 in front, 

 and the tarsi, yellow ; the posterior femora at their apex in front 

 yellow ; the tibise and tarsi black ; the wings hyaline, a fuscous 

 cloud on the anterior margin of the superior pair. Abdomen : 

 a broad yellow band on the posterior margin of the first segment 

 and a narrow one on that of the third ; beneath, a pale lunate 

 spot in the middle of the second segment. 



Hab. Brazil (Santarem). (Coll. H. W. Bates.) 



95. Cerceris s^vissima. B.M. 



Female. Length 4 lines. — Black and strongly punctured ; 

 the face below the antennae and the mandibles pale testaceous, 

 the tips of the latter ferruginous ; the clypeus slightly elevated ; 

 the flagellum fulvous beneath. Thorax : a narrow indistinct 

 line on the collar, the teguLx, two spots on the clyi^eus, an in- 

 distinct narrow line on each side of the subcordiform space at 

 the base of the mctathorax, and a narrow line at the sides, of an 

 oransre-vellow : the winffs sliorhtlv coloured, with a dark fuscous 

 cloud on the anterior margin of the superior j)air ; the tips of the 

 coxpc and trochanters pale testaceous ; the anterior and interme- 

 diate femora yellow^ beneath ; the posterior pair rufo-testaceous 

 beneath ; the anterior tibia; and tarsi yellow, the tibiae black 

 above. Abdomen : the apical margin of the basal segment pale 

 testaceous-yellow : the second segment black, the following tes- 



