ODYNERUS. :j47 



(Among the Stenancislroceri this type is represented by Sten- 

 anc. Fariasi.) 



143. O. Totonacus Sauss. (Fig. 23.) — Sat minutus, gracilis, niger, 

 nit id us, • cinereo-subsericeus, cribrato-puuctatus ; metanoto convexo, 

 tenuissime punctulato, foveola vel potius sulco striato diviso, canthis 



argenteo-pilosis ; abdominis priino segmento convexo-infundibulit'ormi ; 

 capitis punetis, pronoti margine postico, post-seutello, metanoti fasciis 2, 

 macula subalari segmentoruinque 1', 2 1 margine, sulfureis vel albidis 1 ; 

 tibiis antice sulfuivo-notatis ; tegulis nigris. — %. Antennis subtus fer- 

 rugineis ; clypeo subemarginato, luteo, nigro-rnarginato. 



Odi/n. Totonacus Sauss. Revue de ZooL, IX, 1857, 278. 

 Total length, 10 mm. ; wing, 8 mm. 



9. Form slender, elongate, narrow. Head as high as wide; 

 the notch of the eyes opened, triangular; clypeus rather strongly 

 punctate, rather widely truncate, biangulate, or having a little 

 concave apical margin. An impressed point on the vertex. 

 Prothorax squarely cut, angulate, slightly bidentate. Head and 

 thorax densely cribrose; the flanks more finely punctate; meta- 

 thorax narrowed, triangular, slightly biconvex, smooth, very 

 finely punctured only, not cribrose, like the rest of thorax ; its 

 excavation being rather a wide groove than afossette; delicately 

 strigate-punctate; the lateral ridges very sharp, garnished with 

 whitish hair. Abdomen slender, elongate; first segment convex, 

 triangular, cribrose like the thorax; the second finely punctured, 

 contracted at base or snbtuberculate; its margin a little more 

 coarsely punctured than the rest, but without a distinct zone, not 

 canaliculate ; the following less and less strongly punctured. 



Black, shining, with sparse grayish down. Scape beneath 

 fulvous; a spot on the mandibles, a frontal spot, ocular and post- 

 ocular spot, pale yellow; posterior margin of prothorax and its 

 angles, a spot under the wing, appendix of tegulse, anterior margin 

 of post-scutel, two elongate marks on the inferior extremity of 

 metathorax, and a narrow margin on the 1, 2 abd. segments, pale 

 sulphur-yellow; the yellow fascia of the second generally still 

 narrower than that of the first; both a little prolonged on the 

 lateral angles of the segments. Tegulss black or margined with 



brown. Feet black; tibiffi anteriorly with a sulphur-yellow line; 

 tarsi slightly brownish, or rather ferruginous. Wings smoky. 



1 Vol potiua stramineis. 



