294 HYMENOPTERA OF AMERICA. [PART I. 



nato, in medio signatura nigra; abdominis secundi segmeuti margine 

 crasse punctato sed nee iinpresso, nee rugoso, J . 



Odyn. flavopictus Sauss. Rev. et Mag. de Zool. IX, 1S57, 276. J 



Total length, 11 mm. ; wing, 9.5 mm. 



Very similar to 0. foraminatus ; a little smaller, and differing 

 by its clypeus being a little more triangular, and principally by 

 its metathorax, destitute of sharp edges superiorly, not forming 

 behind the post-scutel two teeth separated by a fissure. 



9 . Rather slender. Clypeus wide, its apex narrowly produced, 

 a little excavated, bidentate. Post-scutel not crenulate. Con- 

 cavity of metathorax finely striate ; its edges roughly punctured, 

 not margined superiorly by any sharp edges. Abdomen a little 

 more contracted anteriorly. The whole body more finely punc- 

 tured ; the margin of the 2d abd. segment strongly punctured, 

 but not rugose; more impressed. 



Black, with the same ornaments as 0. foraminatus ; all the 

 abdominal segments margined with yellow; the border of the 

 first segment widened on the sides, with three black notches. 

 Clypeus yellow, with a central black spot, and its apex margined 

 with black. Wings washed with fuscous, with bronze reflections. 



Hab. United States. Tennessee. * 



This may be a variety of 0. foraminatus, with imperfectly 

 developed form. 



lOS. O. Guerreri Sattss. — Obscure rufus et niger, rugose punetatus, 

 fulvo-hirsutus ; clypeo truncato ; post-scutello 9 bigibboso, % 2- vhI 

 4-dentato ; metathorace ubique obtundato, dense punctato, foveola 

 striata minoie, nullomodo acute-marginata canthis nullis; abdomine 

 ovato-conico, marginibus segmentorum 2' et sequentium grosse punc- 

 tatis ; secundi valde impresso ; antennis runs, apice nigris ; capite 

 nigro, orbitis 9 omnino rufo-marginatis nee nou in vertice summo ; 

 vertice 9 fascia rufa transversa- ornato-; tborace rutb-maculato. pronoto 

 rufo ; abdomine ruf'o; segmentis omnibus flavo-marginatis, ic, 2° basi 

 nigro-variis ; alis fusco-nebulosis, costa ferruginea. 



Odyn. Guerreri Sauss. Revue et Mag. de Zool. IX, 1857, 277. 



9 . Total length, 12 mm. ; wing, 10 mm. 

 'J, . Total length, 9.5 mm. ; wing, 8 mm. 



9. Insect quite slender, of an obscure red, velvety. Head and 

 thorax densely cribrose; scutel divided by a longitudinal groove; 



