Sept., 1916.] AcKERMAN : Carpenter-Bees OF U. S. 221 



abdomen in tabaniformis are tawny and less interrupted medially by 

 the black hairs in astcca. A::teca could therefore be reduced to a sub- 

 species of tahanifonnis, but since there is no record of this form 

 occurring in the United States I shall not include it in this paper. 



Tabaniformis is primarily a neotropical species, but it also occurs 

 in the southwestern United States. It is closely related to orpifex, 

 these two species being the only Xylocopas of the United States which 

 have penicilli present on the last dorsal abdominal segment. Tabani- 

 formis, however, is easily distinguished from orpifex by the white 

 pilosity of the abdomen present in the former. 



Xylocopa fimbriata Fabr. 



Xylocopa finbriata Fabr., Sys. Piez., p. 340, n. 7, 5. 1S04. 



Xylocof^a finbriata Fowler, Rept. Cal. Exp. Sta., part II, p. 318, 1898-1901. 



Xylocopa finbriata Perez, Act. Soc. Bordeaux, LVI, p. 81, iii, 5. c^. iQoi. 



Xylocopa finbriata Cockerell, Southern Cal. Acad. Nat. Sciences, No. 6, p. 87. 



June, 1904. 

 Xylocopa finbriata Maidl, Ann. Nat. Hist. Hof.-Mus. Wien, p. 311, 5. c?. 1912. 



Length of female, 30-32 mm. ; of male, 28-30 mm. 



Female. — Head black, very large, as wide as thorax, face con- 

 caved in the middle, hairs everywhere black, long on the cheeks and 

 face ; mandibles with two large teeth at the apex, and one small, 

 rounded tooth on the middle of the inner margin, no depression at 

 the base and very few punctures present, the upper longitudinal 

 groove very deep ; labrum with three lobes ; clypeus with large but 

 few punctures, the lower marginal area irregular, having a small 

 convex area in the middle with a large pit on each side of it, the 

 upper margin with a well rounded elevation curved upward like a 

 bow, the shining impunctate sides more sharply ridged and the lower 

 extremities very prominently raised ; longitudinal carina obsolete ; 

 frontal shield from the clypeus to the insertion of the antennae flat, 

 the superior half concaved, there being no frontal carina present ; 

 the lateral areas of the frons between the clypeus and eyes irregu- 

 larly concaved and situated on a lower plane than the clypeus, so 

 that the presence of lateral foveolse and frontal grooves are merely 

 marked by a suture on each side ; median ocellus set in a very con- 

 caved, impunctate surface, with a short groove extending back for a 

 little distance midway between the hind ocelli ; the sides of the median 

 ocellar area well ridged ; a small concaved area behind the median 



