ODYNEKUS. 335 



9. Form and size as in 0. anormis, clypeus coarsely strigate- 

 punctate. An impressed point behind the ocelli. Thorax shorter. 

 Metathorax rather flattened behind ; its concavity not distinctly 

 strigate; the lateral an,d inferior edges sharp. The first segment 

 of abdomen not so sessile, nor so short, mere rounded, funnel- 

 shaped or cup-shaped; the second constricted at base, to fit into 

 the first. The whole insect finely punctured, more finely and 

 more densely than in 0. anormis; the 2d and 3d segment more 

 strongly so than the first ; the margin of second more coarsely 

 cribrose ; its edge smooth, very slightly reflexed. 



Black, silky, rather woolly. Ornaments of the body yellow, 

 just the same as in 0. anormis; but the lateral spots of the first 

 two segments are quite small or wanting, and the marginal fascia 

 of prothorax complete. Tegulse rufous. Wings cloudy, prin- 

 cipally in the radial cell. 



Var. a. Extremity of clypeus with two yellow marks; 5th abd. 

 segment not margined. 



b. Ornaments and feet, except at base, ferruginous. 



c. No yellow spots on the 2d segment. 



% . Clypeus yellow, bidentate ; a line on the mandibles and 

 inner orbits yellow. No spots on the 2d segment. 



Var. Metathorax quite black. 



Bess. a. diff. — A very difficult species. Most resembles 0. 

 Mayus; differs from it by its more triangular posterior face of 

 metathorax, somewhat larger size, antennae not fulvous beneath, 

 etc. — (Nevertheless it may be a variety of 0. mayus.) 



From 0. anormis it differs by its velutinous body and its less 

 cylindric thorax, wider anteriorly. 



Bab. Mexico. T caught 2 9 in the mountains of Angangoeo 

 (Michoacan) ; % 9 near Cuernavaca; 9 in the barranca of Mex- 

 titlan ; 4^,4^ from Orizaba (Sumicnrast). 



** No lateral yellow spot on the ahrfomenA 

 t Excavation of metathorax rattier large. 



134. O. Inca Sattss. — Parvulus : niger, nbiqtie seqnaliter punetatus, 



metathorace rite foveolato, foveola punctata : capitis punch's, pronotl 

 margins antieo, macula siibalari, tegulis, post-sontello abdominisque 



1 Compare also 0. Victoria-, which is Very often destitute of lateral yel- 

 low spots on the 2d segment of the abdomen 



