458 HYMENOPTERA. 



broadly testaceous ; the four apical segments distantly punc- 

 tured. 



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



87. Cerceris atriceps. B.M. 



Female. Length 5 lines. — Black and punctured; the basal 

 joint of the flagellum obscurely ferruginous beneath ; the face 

 covered with silvery pubescence. Thorax : a line on the outer 

 margin of the tegulae, and the post-scutellum, yellow ; the sub- 

 cordiform space at the base of the metathorax smooth and 

 shining, with an impressed line down the centre ; the wings 

 hyaline, with a fuscous stain along the anterior margin of the 

 superior pair ; the tibiae with a testaceous stripe in front, and 

 the posterior femora testaceous at their apex beneath. Abdomen : 

 a narrow ovauge-yellow band on the apical margin of the third 

 segment ; the abdomen is thinly covered with short hoary pile, 

 most observable at the sides and beneath. 



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



88. Cerceris basalis. 



Female. Length 5 lines. — Black and strongly punctured ; 

 an abbreviated line at the inner orbit of the eyes, and the base of 

 the mandibles, yellow. Thorax : a narrow yellow line on the 

 posterior margin of the scutellum ; the tibia; in front, and the 

 anterior and intermediate tarsi beneath, yellow ; the tips of the 

 femora yellow beneath ; the wings with a fulvous stain towards 

 their base ; a fuscous cloud occupies the first submarginal and 

 the marginal cells, and extends to the apex of the wings, the 

 uervures ferruginous ; the subcordate enclosed space at the base 

 of the metathorax coarsely punctured. Abdomen covered with 

 a fine changeable silky pile ; the first segment not so narrow as 

 is usual in the genus, and widest at its apex ; the third aud fol- 

 lowing segments yellow ; the segments beneath with yellow 

 bands on their apical margins; the fifth and sixth yellow. 



Hab. Brazil. (Coll. F. Smith.) 



89. Cerceris imitator. B.M. 



Male. Length 5 lines. — Head and thorax black and shining, 

 strongly punctured ; the scape in front, face and mandibles, yel- 

 lowish-white ; the flagellum pale testaceous towards the base 

 beneath ; the collar, tegula; in front, and two transverse ovate 

 spots in the middle of the metathorax, yellowish-white, the legs 

 beneath are of the same colour ; the posterior tarsi fuscous ; the 



