ODYNERUS. 349 



limbo anguste, sulfureis ; tibiis autice tarsisque ferrugineis. — £, . Clypeo 

 albido, apice subeinarginato ; antennis subtus ferrugineis. 



Odjn. coyotus Sauss. Rev. de Zool. XXII, 1870, 106, 30, % . 

 Total length, 8 mm. ; wing, 6 mm. 



Form the same as in 0. totonacus, but the size quite small as 

 in 0. Tacubayse. Head and thorax very densely and rather 

 rugosely punctured, shagreened ; post-scutel triangular, but 

 having at its summit a very delicate little arcuate sharp line ; 

 looking backward, metathorax not so oblique even as in toto- 

 nacus, more vertical, not rugose, very finely punctured, convex, 

 with a little fossette on its inferior part; its edges hairy, grayish. 

 The superior articular valves of the apex spiniform. Abdomen 

 slender; the first segment arcuate, funnel-shaped, longer than 

 wide, 'very slightly petiolate, and with a depression above. 

 Second segment about as wide as long, strongly constricted at 

 base, which makes it subbidentate above and beneath. The first 

 two segments almost equally punctured, as strongly as the thorax, 

 but shining; the following less and less strongly so. 



Black. The clots on the head nearly imperceptible or want- 

 ing ; the hinder margin of prothorax and its angles quite finely 

 bordered with pale yellow ; only two little yellow dots on the 

 extremities of post-scutel, and the first two segments with a 

 narrow sulphur-yellow margin, which is not continued on the sides 

 of the first segment. Feet black; tibia? and tarsi somewhat varied 

 with brown or ferruginous. Wings but very little smoky. 



% . Clypeus white, its extremity with an arcuate snbemarginate 

 notch. Mandibles with a white line. Flagellum fulvous beneath. 



Bess. a. cliffy — This insect has just the same size and appearance 

 as 0. acolhuus, but yet is very different, having the post-scutel 

 triangular, not flat above, truncate behind, not crenulate. From 

 0. Tacubayse it differs by its strongly punctured abdomen, and 

 its shorter 2d segment, without an arcuate margin, shorter meta- 

 thorax, etc. 



Hab. Temperate Mexico. I caught two males in the valley 

 of Mextitlan ; one from Orizaba (Sumichrast). 



145. O. Taculbayae Sapss. (Fig. 27.) — Minutus, niger, gracillimus, 

 tenuiter punctatus, metanoto depresso, postice prodncto; abdominis 1>^ 

 segmento infundibuliformi : secundo valde elongato, margine postico 

 arcuato ; scapo subtus, frontis macula, pronoti marginibus, fascia post- 

 scutelli et margiue abdominis segmeutorum 1P-20, sulfureis ; tibiis et 



