28 AMERICAN HYMENOPTERA. 



Location of specimens. — American Entomological Society 

 (Philadelphia Academy of Natural Sciences), 9 . Type No. 

 63, Klamath County, Cal. N. Y. State Museum (Albany), 

 9 , Colorado. 



OpMon bifoveolatus nigrovarius. 



Ophion nigrovarius Provancher, Nat. Can., VI, p. 704, 9 cf , Can. .1874. 



" XI, p. 118, b, n. 5, 



9 & 1879. 



" " " Faun. Ent. Can., Hym., II, p. 



351, n. 5, 9 c5^ 1883. 



Dalla Torre, Cat. Hym., Ill, p. 196 1901. 



" nig-rovarimti Felt, N. Y. State Mus., Bull. 76, p. 121, Col., 



Can 1903. 



" nigrovarius Szepligeti, Gen. Ins, Hym., 34me Fasc.,p.32, 



n. 17 1905. 



Fulvo- ferruginous varied with black ; eyes small, distant frotn base 

 of mandibles ; thoracic sutures, pleurcz, pectus and metathorax partly 

 black, wings tinged with fuscous, scutellutn flavous. 



Length, 14-20 mm. ; wing, 11-14 mm. ; spread, 24-30 mm. ; antennae, 

 10-16 mm. 



Fulvo-ferruginous varied with black ; clothed with fine short pubes- 

 ence; eyes small, distant from the base of the mandibles, only very 

 slightly emarginate ; ocelli prominent, well separated, the posterior 

 not far from the top of the eyes ; face broad, more or less flavous, an- 

 tennae ferruginous, rather shorter and stouter than usual, their fossae 

 often black, clypeal foveae deep black. 



Thorax flavofulvous, varied with ferruginous and black ; the thoracic 

 sutures, pleurae, pectus and base of the metathorax more or less black; 

 scutellum usually flavous ; metathorax without distinct keels although 

 two to three weak median longitudinal keels are sometimes present ; 

 z£^z«^5 slightly smoky ; stigma fulvous, costal nervure brown, the others 

 dark fuscous; discocubital vein usually not appendiculate though a 

 trace of an appendix is often present and is occasionally distinct ; 

 nervulus antefurcal to interstitial, nervellus broken at or slightly above 

 the middle. 



Legs of the general color, coxae more or less fuscous, often almost 

 entirely flavous in the female ; feet yellow ; claws pectinate 



Abdomen of the general color, varied with black. 



In describing this species I have compared three 9 speci- 

 mens with the various descriptions. 

 Types. — 9 cf. Location unknown. 

 This form is so closely related to O. bifoveolatus that it can 



