Sept., 19 16.] ACKERMAN : CaRPENTER-BeES OF U. S. 225 



clypens more convex, the upper margin and sides not elevated, longi- 

 tudinal carina rounded; frontal carina very small and pointed, the 

 upper margin faintly grooved with a pit in its middle; ocelli not 

 sunken, close together, ocellar pits minute or obsolete, a shallow 

 groove midway between the posterior ocelli ; eyes not large and wide 

 apart; lower side of antenna yellowish on first segment, otherwise 

 yellowish brown, its upper side brownish black throughout and with 

 no pubescence ; vertex and cheeks with long, dense yellow hair and 

 very fine punctures. 



Thorax yellow with more or less brown, especially on the post- 

 scutellum, propodeum and sides ; hairs yellow ; scutellum flat, shining, 

 with but little hair and few punctures ; post-scutellum also rather flat. 



Abdomen yellow, with a brown band along the hinder margin of 

 each segment, but this is variable as the color may become tawny in 

 old specimens; pilosity yellow, rufous and long at the apex; finely 

 and densely punctured throughout. Wings semihyaline; tegulae 

 fulvous. 



The fore legs from their bases to and including the basal part of 

 the femora, and the intermediate and hind legs as far as the tibiae 

 brownish black, otherwise yellow or fulvous; hairs everywhere yellow 

 with a slight red tinge on the tibiae and tarsi ; tibial scale very small 

 and black. 



Type. — Location unknown. 



Distribution. — Texas, Arizona, Southern California, Mexico, Cen- 

 tral and South America, West Indies. 

 Xylocopa brasiliaiionim ccncipennis (DeGeer). 



This form differs from the typical brasiliaiionim as follows : Fe- 

 male — scutellum more truncate behind; abdomen with the ventral 

 longitudinal carina even sharper and more prominent; wings semi- 

 hyaline, with a brassy luster and a violet tint on the apical margin 

 of the anterior wings ; length 22-24 ii^"i- Male — with a dark brown- 

 ish area on the middle of the clypeus ; a black ring surrounding each 

 ocellus; bands along the hind margin of the abdominal segments 

 wider and darker colored. 



Habitat. — xA-rizona. 

 Xylocopa brasiliaiionim cubcrcola (Lucas). 



This form differs from ccneipcnnis as follows: Female with the 

 scutellum sharply truncate behind; ventral abdominal carina the 



