344 HYMENOPTERA OF AMERICA. [PART I. 



lecus var., and Peyroti, which have the same livery, but not the 

 rough metathorax, and differ also % by the reflexed margin of 

 its 2d segment and the first having both the margins of prothorax 

 yellow. 



(Compare with 0. myslecus, which has also a rough meta- 

 thorax. ) 



Hab. The hot and temperate parts of Mexico. I caught 5 9 , 

 4 % near Tampico, and in the temperate part of the province of 

 Mexico, near Yautepec. — Numerous specimens were caught by 

 my companion, Mr. Sumichrast, in the Oriental Curdillera, Cor- 

 dova, Orizaba, etc. 



140. O. similis Smith. — Niger, fulvo-velutinus ; puncto frontali et 

 clypei apicis, abdomiuisque segmentorum 2'-G' margine, llavis ; alis in 

 costa feriugineis. 9- 



Odyn. similis Smith, Cat. Brit. Mus. Vespid. 80, 202, 9 . 



Total length, 4^ lines. 



9. Black, covered with ochraceous pubescence, and having 

 also a clothing of changeable golden pile. Clypeus truncate at 

 the apex; the lateral angles acute, subdentate. A yellow spot 

 between the antennae and another at the apex of the clypeus. 

 Thorax slightly narrowed anteriorly and posteriorly ; the ante- 

 rior margin of the prothorax not raised or sharply truncate. 

 Metathorax rounded at the sides and truncate posteriorly, and 

 slightly concave. Abdomen: first segment much narrower than 

 the second, strongly punctured; its apical border marginate ; the 

 apical border of the 2-5 segment with a broad yellow fascia, the 

 apical segment yellow, with a black spot in the middle of its 

 base ; the fascios of the segments continued beneath. Wings hya- 

 line; the anterior margin of the superior pair yellowish; nervures 

 ferruginous. 



Hab. Mexico. 



This species by its golden velntinous clothing and ferruginous 

 wings seems to approach very nearly to 0. otomitus, and mayus, 

 but differs by its quite black antennas, thorax, first segment, and 

 feet. This should separate it more from 0. Payroll var., although 

 differing in several characters, this species having more argente- 

 ous pile, antennas not quite black, etc. 



