CAMERON, SOME ODYNERINAE OF THE SOUTHWESTERN UNITED STATES 131 



sides extendinsj to the apex, a line around the postscutellum, lower edge of 

 propleurae, lower half of meso])leurae. mesosternuni, ha?e of nietapleurae, the 

 base of the third abdominal segment narrowly, of the fourth more I)roadly, 

 and the base of the second ventral, black. Wings hyaline, narrowly suffused 

 with fuscous in front, the costa and stigma dark testaceous, the nervures black. 

 Female — Length .12 mm. Nogales, Arizona. (Oslar.) 



A broad stout species, sparsely haired and except the basal abdominal 

 segment, closely strongly punctured. Clypeus as broad as long, its apex 

 bluntly rounded. Thorax about twice longer than wide, as wide as the head, 

 the base with the sides rounded, the sides of the apex rounded and rough. 

 Postscutellum projecting over the metanotum. coarsely punctured except on 

 lower apical slope which is perpendicular. Metanotum roundly hollowed, the 

 sides transversely striated. Abdomen long-ovate, as long and as wide as the 

 thorax ; the first segment cup-shaped, with a distinct pedicel at the base, as 

 wide as the second which is slightly wider than long, its apex depressed and 

 more strongly punctured than the rest. Mandibles of a paler rufous color than 

 the head, the teeth black. Tegidae rufous, with a large lead-colored spot in 

 the center. There is a distinct oblique depression over each antenna, the lower 

 part of the front being thus gradually narrowed. The base of the second 

 ventral segment is thicker than usual, projecting more downwards, and there- 

 fore appearing more clearly separated from the first ; there is a distinct furrow 

 down the basal half. The punctured apical depressed part of the second 

 abdominal segment is wide, and broadly roundly dilated backward in the 

 middle. 



Odynerus jeromensis n. sp. 



Black, the head, thorax and base of abdomen densely covered with a 

 longish pale pile; the clypeus, the greater part of the antennal scape a small 

 mark wider than long and roundly narrowed below over the antennae, post- 

 scutellum, a line on the apex of the first abdominal segment dilatetl laterally, 

 the dilation longer up and down than longitudinally and with the edge of 

 the base ragged, the basal two-thirds of the second segment, the apex not 

 reaching to the outer edge, before it an irregular indentation longest laterally, 

 narrowed inwardly, the base with an irregular edge, the apical boundary nar- 

 row and narrowed towards the outer edge, the third and fourth segments 

 except narrowly at the base, the Ifth more widely, the line roundly widened 

 at the base, the apical half of the sixth, and the greater part of tiie ventral 

 surface, lemon yellow. The following parts are black on the ventral segments : 

 the first segment, the base of the second broadly, the line in the middle nar- 

 rowed gradually and continued to the middle, where it ends in a narrow square 

 projection, the base of the following segments and the basal two-thirds of the 

 last, a short line behind the top of the eyes, a line narrowed in the middle on 

 the base of the thorax rufo-fulvous. Tegulae dark yellowish testaceous, largely 

 fuscous in the middle. T.egs rufo-testaceous, the trochanters, the four ante- 

 rior coxae behind, base of four anterior femora, the hind coxae, and the iiind 

 femora broadly, black. Wings hyaline, slightly infuscated, the costa and 



