396 AMERICAN HYMENOPTERA. 



'^ . — 7 mm. — Very like the 9 iu structure, sculpture and color. 



Head. — No flattened tubercle back of the anterior ocellus, the vertex being 

 uniformly closely punctured or rugose; the clypeus about as wide as long, entirely 

 yellow; the yellow mark between the antennal sockets prolonged down to the 

 clypeus. 



'Ihoraz. — The yellow on the metathorax reduced to a spot on each side, and 

 but one spot on each mesothoracic episternum. 



Abdomen. — There is a spot instead of an oblique band on each side of the first 

 dorsal segment. 



Types. — University of Kansas. 



Type locality. — Thomas' Ranch, Oak Creek Canon, 20 miles 

 southwest of Flagstaff, Coconino Co., Arizona. 



Three 9 and three S paratopotypes, tlie males are all practically 

 alike, while in the females there is some variation in the maculation, 

 notably in the clypeus, where the yellow is more reduced or more 

 elaborate than in the type and on the scutel where two yellow spots 

 present themselves; furthermore, the yellow of the metathorax and 

 on the mesothoracic episternum is decreased or increased in extent 

 as compared with the type. 



All the specimens were taken in August, 1902, by F. H. Snow. 



Odynerus (Stenodyneriis) proTisoreu$« n. sp. (PI. XII). 



Superficially like spectabiliformis, from which it differs, especially 

 as follows : 



■^ . — 14 mm. — In size, in the postscutel and in the abdomen, this is more like 

 Odynerus s. s. than Renodynerus. In structure it seems to come nearest to the 

 group of which 0. Jlavopictus is representative. 



Head. — As long as wide, dullish, punctate, the punctuation pretty much the 

 same as in campestris, black, yellow and reddish-yellow; clypeus entirely yellow, 

 its anterior edge arcuate and about two-thirds as great as the anterior lateral 

 margin, a transverse supraclyjieal yellow mark with its lower margin emarginate 

 and on a plane or nearly on a plane with the posterior or upper edge of the an- 

 tennal sockets, the lower edge of the eye emargination bordered with yellow, a 

 vertical reddish-yellow stripe bordering the portion of the eye nearest the ante- 

 rior ocellus, another reddish-yellow stripe bordering nearly the entire posterior 

 margin of the eye; mandibles mostly yellow, margined with blackish and 

 brownish; scape yellow in front, reddish-yellow behind, pedicel and first joint 

 of flagel entirely reddish-yellow, the remainder of the flagel almost entirely 

 black, excepting the fourth joint of the antennae which is partly brown; pubes- 

 cence inconspicuous, golden, tinged with brown, in no jilace much longer than 

 the pedicel. 



Thorax. — Sculpture much the same as campestris, but there is a longitudinal 

 impressed line on the anterior half of the mesonotum and the scutel in the mid- 

 dle; pubescence as on the head ; black and reddish-yellow, the latter color being 

 confined to the greater portion of the pronotum, including the anterior and pos- 

 terior margins, tegulse, a spot below the latter on the mesothorax and a spot on 



