228 Journal New York Entomological Society, t^'o'- xxiv, 



dant below ; a patch of grayish white hairs at the sides of segment 

 one, everywhere else black ; epipygium large, wide at the base, spines 

 stout. 



Wings fusco-hyaline with a strong violet tint, darkened at the 

 apex; tegulje bluish green. Legs greenish blue, hairs black; tibial 

 scale very prominent, both lower teeth sharp, the anterior one more 

 narrowed, irregular above. 



Male. — Differs from the female as follows : Head smaller, not 

 thick, face narrower, entirely dark with more green and purple ; man- 

 dibles smaller, upper longitudinal groove deep, lower one more pro- 

 nounced than in female, lower tooth at apex much the larger of the 

 two ; labrum with one triangular lobe, sometimes apparently trape- 

 zoidal ; clypeus convex, longitudinal carina more prominent ; frontal 

 carina smaller and more pointed, upper margin flat ; median ocellus 

 less sunken, posterior ones less carinated in front ; eyes much larger 

 and converging slightly above ; vertex behind posterior ocelli flat, 

 cheeks not so thick. Thorax with the gray hairs more evident above, 

 and present on each side below the wings, being entirely black below, 

 only. Abdomen shorter and more robust, punctation above much 

 finer and closer on the first four segments, coarse but abundant on 

 the remaining segments ; pilosity grayish-white on the whole of first 

 segment, and laterally on the hind margin of the fourth and some- 

 times on the third segments, otherwise black; wings a little lighter, 

 tegulje brown, legs with tibial scale reduced to a point, inner surface 

 of posterior tibiae with short brown hair. 



Type. — In the Acad, of Nat. Sc. at Philadelphia a female labeled 

 " Lecto-type, No. 2619 " " Cala." 



Distribution. — California, Nevada, Colorado and South Dakota. 



This species is of a distinct olive green color in both sexes; wings 

 fusco-fuliginous with a violet tint. It is very similar to arisonensis 

 (Cress.). Cresson described only the female of this species, while 

 the first record that I find of a description to fit the male is by Perez 

 ini90i,who names his specimens fl?n&/art/i. Perez says that am^/ardi 

 is very similar to virginica but, according to his description, there is 

 no doubt that his species is the male of calif ornica (Cresson). In 

 1912 Maidl recognized and described it under its right name. 



Xylocopa arizonensis Cresson. 



Xylocopa arizonensis Cresson, Trans. Am. Ent. Soc, VII, p. 212, 5> c?. 1879. 



