of Fossorial Hymenoptera. 51 



coidal cell ; legs black ; the tibiae and tarsi very strongly 

 spinose ; the coxa? with golden pile. Abdomen black, with 

 a sericeous pile that changes in tint in different lights, to green, 

 gold, blue, or opaline lustre. 

 Hab. Para. 



Pepsis purpureus. 



Female. Length 7 lines. Purple, with blue and green tints 

 in certain lights. The four apical joints of the antenna?, and 

 the apex of the fifth, bright orange-yellow. The posterior 

 margin of the prothorax incrassate ; the metathorax trans- 

 versely and irregularly striated, and having a longitudinal 

 central impressed line, extending to the apex ; the wings 

 dark fuscous, with a minute hyaline spot at the base of the 

 second discoidal cell ; the intermediate and posterior tibia? and 

 tarsi strongly spinose. Abdomen smooth and shining, par- 

 taking of splendid tints of purple, blue, and green in different 

 lights ; the apical segment covered with erect black hairs. 



Hab. Tapajos ; Para. 



A specimen of what I can only regard as a variety of this 

 species, from Para, differs in having an additional pale joint 

 at the apex of the antenna?, and also in having the impressed 

 line on the metathorax very faintly traced. 



Genus Ceeopales, Latr. 



Ceropales crassicomis. 



Male. Length 6 lines. Black, and variegated with spots 

 and fascia? of a pale ochraceous colour, tinged with ferru- 

 ginous. Head rather wider than the thorax, the antenna? 

 fulvous beneath ; the clypeus and inner orbits of the eyes as 

 high as the anterior stemma, and a narrow line behind the 

 eyes ochraceous ; the labrum sulphur-yellow. Thorax : the 

 posterior margin of the prothorax, the tegula?, and a line over 

 them, an oblong spot on the mesothorax, the scutellum, the 

 sides of the metathorax, and a line in its centre, not reaching 

 its apex, ochraceous ; two ovate black spots at the base of the 

 scutellum ; all the coxa? ochraceous, and more or less striped 

 with black ; wings flavo-hyaline, with a dark fuscous cloud at 

 the apex of the anterior pair, which extends nearly to the base 

 of the marginal cell ; the posterior pair faintly clouded at 

 their apex ; the nervures ferruginous, the costal ones black. 

 Abdomen : the basal margin of the first, second, and third 

 segments with an ochraceous fascia ; beneath, the three basal 

 segments have their lateral margins broadly ochraceous. 



Hab. Para. 



