NO. 2264. BEES IN THE NATIONAL MUSEUM. 3—COCKERELL. 177 



minima Friese, but known by the brilliant green head and thorax, 

 and the color of the legs. 



Type.— Cat. No. 20707, U.S.N.M. 



OSIRIS PANAMENSIS, new species. 



Female. — Length about 7 mm., not counting exserted sting. 

 Polished, shining ferruginous or ruf o-testaceous ; front, vertex (ex- 

 cept obscure reddish mark above each eye) and mesothorax black; 

 abdomen suffusedly dusky; hind tibiae, except at base, black, covered 

 with black hair; hind basitarsi as broad as tibiae, dark reddish, 

 covered with black hair; spurs of middle and hind legs large and 

 dark; tegulae rufotestaceous; wings clear hyaline, orange tinted, 

 apex grey; stigma and nervures pale ferruginous; second s. m. broad, 

 receiving first recurrent nervure in middle; third submarginal cell 

 narroAver on marginal than on outer discoidal; antennae ferruginous, 

 apical half of flagellum dusky above; third antenna! joint much 

 shorter than fourth. Prothorax above swollen on each side ; area of 

 metathorax very large, triangular, smooth, and polished, except a 

 narrow transverse rugosoplicate band at base; claws simple, bulbous 

 at base; tongue w^ith broad spoon-like end; second joint of labial 

 palpi about 608 \>. long, the two last joints each about 80 \). long; 

 maxillary palpi about (not over) 352 [i. long; a delicate keel down 

 middle of front ; hind wing with seven costal hooks. 



Taboga Island, Panama, June 10, 1911 (A. Busck) . 



Nearest to 0. tarsatus Smith but easily known by the black on 

 hind legs. 



Type.— Cat. No. 20708, U.S.N.M. 



RHATHYMUS BICOLOR, variety NIGRIPES Friese. 



Female. — Toca do Onca, Brazil, June 27, 1915. 



The legs have a good deal of pale hair, contrary to Friese's de- 

 scription, but there is otherwise excellent agreement. In color the 

 insect resembles Epicharis conica Smith, but the wings are much 

 darker. 



RHATHYMUS UNICOLOR Smith. 



Female. — Sapucay, Paraguay, April 7, 1903 (W. T. Foster). 

 The specimen is almost 20 mm. long, but otherwise agrees with 

 R. unicolor. It looks like a large red Nomuda. 



OXAEA TACHYTIFORMIS Cameron. 



Mexico, D. F. (J. R. Inda, No. 37). This agrees perfectly with one 

 from Venta de Zopilote, Guerrero, 2,800 feet, October (H. H. Smith), 

 which Mr. Meade-Waldo compared with Cameron's type. The 

 locality assigned by Cameron, " Santa Fe Mountains, New Mexico," 

 was, of course, entirely erroneous. The flagellum is truncated in 

 such a way that it appears as if broken off. 

 62055— 20— Proc.N.M.Vol.55 13 



