320 HYMENOPTERA OF AMERICA. [PART I. 



spot on each side of second segment, pale yellowish-white; apical 

 margin of latter segment reflexed; the second segment beneath, 

 with a yellowish apical margin and the third with a lateral spot 

 of the same color. Legs ferruginous ; coxa3 and part of tro- 

 chanters, black; tips of femora aud base of tibias, yellowish. 

 Wings subhyaline, dusky along the costa, stigma and costal 

 nerve reddish-brown. 



%. Clypeus, upper surface of mandibles, a line between 

 antennae, dilated and sub-bilobed above, and the anterior orbits, 

 almost filling up the emargination, but not extending above it, 

 yellowish-white ; the clypeus smooth and emarginate at tip ; the 

 antenna? black above, the scape yellowish-white beneath, the 

 fiagellum fulvous beneath ; the apical joint gradually thiekened, 

 the eleventh joint emarginate beneath ; the next suddenly 

 smaller, and the apical joint hooked and subacute ; the lateral 

 spots on first and second segments of abdomen smaller and more 

 oblicpie; beneath, the third segment has an entire apical yellowish 

 margin. 



Bess. a. diff. — This seems to be very closely allied to 0. 

 anormis, from which it differs by its pale, whitish ornaments, and 

 the reflexed margin of 2d segment. 



Hab. New Mexko. (Museum of the Am. Ent. Soc. of Phila- 

 delphia.) 



I do not know this species, and I cannot be perfectly sure of 

 having assigned it the right position. 



^>s,> 121. O. COllega Satps. — 0. anormi affinissimus, at minor; differt 

 insnper nietanoti foveola punctata, velutina ; marginibus rotundatis ; 

 clypeo % latiorequain longiore, longe bidentato, dentibus pp.initbrmibus, 

 distantibus. Niger ; clypeo (%), puncto frontali et post-oculari, orbitis 

 internis, scapo subtus. pionoti fascia minuta submarginali, post-scutello, 

 abdominis segnieutorum I 1 , 2' margine pnnctoque minuto utrinque 

 primi segmenti, rlavis vel fulvis ; mandibulis, tegulis pedibusque ferru- 

 gineis ; alis iufumatis, violascentibus, % . 



Odijn. collega Saups. Rev. de Zool. XXII, 1S70, 61, 21, % . 



Total length, 12 mm. ; wing, 8.5 mm. 



?.? 



% . Quite approximating to 0. ocuJatus. But the size is a 

 little larger; % as large as 0. anormis 9; the punctuation is 

 stronger, as strong or stronger than in anormis ?, except on the 

 metathorax, which is less rugose, velutinous. The excavation 



