ODYNERUS. 337 



gineis ; clypeo % fiavo, apice nigro, bi.spino.so ; alis subhyaliuis, tegalis 

 nigris flavo-bimaculatis. 



Odyn. Mysleeus Sauss. Revue de Zool., IX, 1857, 279. 

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



<?. Clypeus pyriform, very coarsely punctured, nearly reticu- 

 lately rugose, prolonged into a sort of beak, subemarginate at 

 tip. Head, thorax, and first abdominal segment densely and 

 strongly punctured. Edge of prothorax finely ruptured, its 

 angles subdentiform. Metathorax vertical, convex, very rugose, 

 rather velutinous ; its concavity very small ; the rough superior 

 faces prolonging themselves on the posterior side, leaving but little 

 place for the concavity ; the lateral edges sharp and hairy. 

 Abdomen rather short; the first segment rounded, not short, bell- 

 shaped, strongly cribrose, rugose at base; 2d segment somewhat 

 in the form of a hawk's bell, rather short, polished, and more finely 

 punctured; its base a little constricted, although the 1st segment 

 is but little narrower than the 2d ; its margin having an impressed 

 zone of coarse punctures ; this zone having anteriorly an undu- 

 late form ; 3d segment densely punctured. 



Black, shining, not velutinous like 0. Huaslecus, May us, and 

 other Mexican species, but garnished with a sericeous gray pile, 

 rather argenteous on head and metathorax. Mandibles brown 

 or rufous; there are often two yellow spots on the top of clypeus ; 

 a frontal spot, a spot in the sinus of the eyes, and a post-ocular 

 line, yellow. Antennae black ; the scape below yellow. Two 

 spots in the middle of prothorax, touching its posterior edge, a 

 quite small spot under the wing (or none), post-scutel and ridges 

 of metathorax, yellow; tegulae brown, margined with ferruginous, 

 maculate with yellow; the margin of the first the widest, fused 

 on the side with a lateral spot, making it emarginate on each 

 side ; the yellow fascia of the second segment having two wide 

 notches, or rather undulate, complete beneath ; the 3d margin 

 quite narrow. Feet black; knees and tarsi beneath rather ferru- 

 ginous. Wings subhyaline, not ferruginous-brown. 



% . Hook of the antennae ferruginous. Clypeus squarely poly- 

 gonal, longer than wide, produced interiorly triangularly, and 

 terminated by two separating teeth or spines; its surface quite 

 coarsely punctured, yellow, with its extremity black. 



The spots of the head larger, the sinus ol' the eyes quite yellow. 

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