NO. 2264. BEES IN THE NATIONAL MUSEUM. 3—COCKERELL. 187 



dish; abdomen red at extreme tip. Some of these characters may 

 be individual, but we doubtless have a distinct insular form. 

 Type.— Cat No. 21648, U.S.N.M. 



CENTRIS MURALIS Burmeister. 



3Iale. — San Juan, Argentina (C. S. Reed). Male (var. melanopus 

 Friese) and female. Mendoza, Argentina (C. S. Reed). 



CENTRIS HOFFMANNSEGGIAE Cockerell. 



Female. — Claremont, California (Baker). 



CENTRIS COCKERELLI Fox. 



Female. — San Jose de Guaymas, Mexico, April 10 (L. O. Howard) . 



CENTRIS NITIDA GEMINATA Cockerell. 



Female. — Chauchamayo, Peru (F. W. H. Rosenberg). Superfi- 

 cially looks exactly like C. nigriventris Burmeister, but is quite dis- 

 tinct. New to Peru. 



Male. — Guayaquil, Ecuador. Light band across clypeus entire; 

 end of abdomen covered with silvery white hair; hind trochanters 

 dentate; hind basitarsi with a spine; scape entirely black. 



CENTRIS CALLOXANTHA, new species. 



Male. — Length about 15 mm., anterior wing 13 ; black, with black 

 hair, but whitish on cheeks, and brilliant canary yellow on thorax 

 above and on tubercles, the disk of mesothorax posteriorly with a 

 round fuscous patch; clypeus much broader than high, smooth, flat- 

 tened on disk, ivory color, except the broad black upper and lateral 

 margins; rest of head without light marks; eyes large, dark olive; 

 antennae placed far aj)art, close to eyes; scape very short, entirely 

 black ; flagellum ferruginous beneath except basally ; ocelli well down 

 on front; mesothorax finely and extremely densely pimctured; 

 tegulae black ; wings dark fuliginous, second submarginal cell as high 

 as long ; hind femora and tibiae extremely stout ; hair of abdomen all 

 black, including first segment. The long dense hair of hind tarsi is 

 dark chocolate color. 



Chauchamayo, Peru (F. W. Rosenberg). A remarkable species, 

 related to C. femoralis Friese, G. lutea Friese, and G. m^xicana 

 Smith, but known by the light clypeus and black labrum. 



Type.— Cat. No. 21649, U.S.N.M. 



CENTRIS OBSCURIVENTRIS Friese. 



Female. — Bocas del Toro, Panama, July, 1908 (W. Robinson). 



Male. — Frontera, Tabasco, Mexico. This is the widely distributed 

 form which Friese describes under G. decolorata Lepeletier, remark- 

 ing that Lepeletier's description does not agree very well and sug- 

 gesting ohscuriventris as a substitute in case of doubt. It is the same 



