HYMENOPTERA. 



459 



wings hyaline, with a fuscous cloud at their apex. Abdomen 

 ferruginous, with the basal and two apical segments black and 

 strongly punctured, with a short silky pubescence beneath ; the 

 first segment with a broad emarginate yellow band on its apical 

 margin ; a narrow yellow line on the apical margin of the fifth 

 segment laterally, an uninterrupted one on the sixth, and the 

 sides of the seventh yellow. 



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



90. CERCERIS IXTRTCATA. B.M. 



Male. Length 5 lines. Black : the face, scape in front, and 

 the mandibles, yellow ; a minute yellow spot behind the eyes, 

 and a large one on the cheeks; the flagellum of a testaceous 

 yellow beneath. Thorax : a minute spot on each side of the 

 collar, a line on each side of the prothorax anteriorly, a spot 

 beneath the wings, a curved line on each side of the pectus, a 

 spot on the tegulse in front, another on each side of the scu- 

 tellum, the post- scutellum, a line down the middle of the sub- 

 cordate space at the base of the metathorax, two ovate spots 

 beneath it, and a minute one on the posterior lateral angles of 

 the metathorax, yellow ; wings hyaline, with a broad dark fus- 

 cous cloud on the anterior margin of the superior pair ; the legs 

 yellow beneath ; the anterior and intermediate tarsi yellow, the 

 tips of the joints slightly ferruginous above ; the posterior pair 

 black, the joints slightly dilated and bordered with bright silky 

 pile within ; the head and sides of the thorax with a thin short 

 cinereous pubescence. Abdomen : the sides and posterior mar- 

 gin of the basal segment yellow ; a narrow yellow band on the 

 posterior margins of the four following segments ; beneath, the 

 first segment yellow, the second with a spot at the base and one 

 on each side ; the following segments are more or less spotted on 

 each side, and thinly covered with silky pubescence. 



The male differs in being smaller and in having more yellow on 

 the collar and scutellum ; the posterior tibiae are yellow at their 

 base. 



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



91. CERCERIS LATRO. B.M. 



Female. Length 4 lines. Black and punctured : the clypeus 

 elevated, forming an obtuse tubercle, rounded above and flattened 

 beneath, the lower or flattened side pale testaceous ; the sides 

 of the face, mandibles, and scape beneath, of the same colour; 

 the flagellum fulvous beneath. Thorax : an interrupted narrow 

 line on the collar, a spot on each side of the scutellum, the post- 



