190 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 55 



fusion; scopa on hind tarsi, on apical part of tibiae, and hair on 

 hind knees, dark reddish brown; hair at end of abdomen chocolate 

 color. 



Eio Mato, Caura district, Venezuela, October, 1909 (M. A. Car- 

 riker). 



Type.— Cut. No. 21654, U.S.N.M. 



CENTRIS FUSCIVENTRIS, variety. 



Male. — Like variety niatoensis, but surface of upper part of clypeus 

 with a minute tessellation (smooth in matoensis) ; fourth abdominal 

 segment with long apprassed pale brownish hairs, appearing whitish 

 in some lights (the same at base of segment laterally in matoensis). 



Rio Mato, Caura district, Venezuela, October, 1909 (M. A. Car- 

 riker) . This may be considered a subvariety of matoensis. 



CENTRIS PROXIMA Friese. 



Escuintla, Guatemala (Stella Deam) ; Alhajuelo, Panama 

 (Busck). 



CENTRIS CHILENSIS Spinola. 



Maipu, Chili (F. V. Ibarro) ; Chubut, Patagonia. 



CENTRIS NIGERRIMA Spinola. 



Maipu, Chili (F. V. Ibarro). 



CENTRIS POECILA Lepeletter. 



Livingston, Guatemala (Barber and Schwarz) ; Tamos, Mexico 

 (F. C. Bishopp). 



CENTRIS TRICOLOR Friese. 



Femnle. — Mendoza, Argentina (C. S. Eeed). The specimen be- 

 longs to a form which has been given a distinctive name in manu- 

 script by Friese, but it appears to be certainly conspecific with tH- 

 color. 



CENTRIS VULPECULA Barmeistcr. 



Male. — Mendoza, Argentina (C S. Reed.) I have this from Villa 

 Encarnacion, Paraguay, sent by Schrottky as C. lanipes variety tar- 

 sata (Smith). This agrees with Friese's interpretation, but I do not 

 think it is the true tarsata. Whether it should be considered a 

 variety of C. lanipes I do not know; it is certainly closely allied. 



CENTRIS BREVICEPS Friese. 



Rio Mato, Caura district, Venezuela, October, 1909 (M. A. Car- 

 riker). I should consider this identical with C. vittata Lepeletier, 

 did not that author positively state that the hind tarsus of the male 

 has an " appendage " on the inner side. Friese indicates that hrevi- 

 ceps is probably vittata.^ but prefers the name hreviceps on account of 

 Lepeletier's imperfect and faulty description. 



