Genus Xylocopa. 291 



100. Xylocopa rotundiceps. 



Female. — Entirely black, and witli black pubescence, 

 wliicli is dense on the face and cheeks, as it is also on the 

 thorax in front and on its sides ; that on the legs is of the 

 same colour, but on the anterior tarsi beneath it is ferru- 

 ginous. The head large, nearly as wide as the thorax, 

 the vertex broad and rounded laterally behind the eyes ; 

 more strongly and closely punctured than the thorax, 

 which is impunctate on the disk and is rounded behind. 

 The abdomen shining, the basal segment with only a few 

 shallow, fine punctures; the two following segments 

 sparingly punctured in the middle, but the rest of the 

 abdomen much more closely and strongly punctured. 

 Length eleven lines. 



Hah. — Brazil. 



*101. Xylocopa similis. 



Female. — Black ; the thorax above, the sides, beneath 

 the Avings, and the basal segment of the abdomen, clothed 

 with ferruginous pubescence ; on the thorax beneath, and 

 all other parts of the insect, it is black ; the disk of the 

 thorax smooth, shining, and impunctate ; the Avings fusco- 

 hyaline, with bright-coppery iridescence, and tinged with 

 piu'ple toAvards their apex. Length ten lines. 



Ilab. — Para. 



This species greatly resembles X. aurulenta, and only 

 differs in having the ferruginous pubescence of the thorax 

 continued on to the first segment of the abdomen, and iu 

 being two or three lines longer, 



102. Xylocopa varians. 



Female. — Dark blue, with changeable tints of green, 

 the latter colour predominating on the abdomen ; the face 

 covered with short griseous pubescence, there is also a 

 little on the cheeks. The disk of the thorax is shining 

 and impunctate ; behind the scutellum is a mixtm-e of 

 griseous and sooty-black pubescence ; on the tarsi beneath 

 the pubescence is fulvous, above it is of a silvery bright- 

 ness ; on the posterior tarsi within it is black ; the apical 

 joints of the tarsi ferruginous ; the wings subhyaline, with 

 a coppery iridescence. Abdomen punctured, with the 

 apical margins of the segments narrowly impunctate ; the 

 sides of the abdomen fringed with black pubescence and 



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