SOME ODYNERINAE OF THE SOUTHWEST 

 UNITED STATES 



p. CAMERON. 

 Leptochilus cratocerus n. sp. 



Black, the clypeus, labrum, mandibles (except the apex which is rufous), 

 a small spot on the front, the lower edge of the eye incision, a short line 

 behind the eyes above, a line on the base of the thorax, dilated irregularly on to 

 the propleurae, a small spot on the sides of the scutellum at the base, post- 

 scutellum, an irregular spot narrowed behind on the sides of the metanotum 

 in the middle, a large conical spot below the tegulae, and broad bands on the 

 bases of the basal six abdominal segments, bright lemon yellow ; the ventral 

 segments are also edged with the same color, the mark on the second being- 

 wider and trilobate. Legs bright lemon yellow, the base of coxae in front, 

 entirely behind, the trochanters, and the base of the femora broadly, the poste- 

 rior to near the apex above and below, and the middle femora beyond the 

 middle above, black. Antennal scape lemon yellow, black above, the flagellum 

 brownish red, black on top. Wings hyaline, the costa and stigma dark fulvous, 

 the nervures black. Male — Length 7 mm. 



Ormsby county, Nevada, July (Baker). 



.Antennae long, stouter than usual, especially toward the apex, the last 

 joint straight above, roundly narrowed to a blunt point below. Clypeus 

 sparsely punctured, covered with silvery pile ; the apex transverse, broad, as 

 wide as the sides which are straight and oblique. Front and vertex closely 

 rugosely punctured, thickly covered with long pale fuscous hair. Temples 

 roundly obliquely narrowed ; the occiput transverse. Thorax clearly longer 

 than wide, the base transverse, with bluntly projecting lateral angles, the apex 

 narrowed, the sides broadly rounded. Pro- and mesothora.x strongly closely 

 punctured ; the postscutellum large, with a rounded oblique slope, the apex 

 transverse. Metanotum deeply depressed in the middle where it is finely 

 closely striated, the rest distinctly punctured above, sparsely punctured and 

 obscurely striated below. Metapleurae shining, aciculated. First abdominal 

 segrnent cup-shaped, longer than it is wide at the apex, gradually narrowed 

 from the ape.x to the base, somewhat strongly but not closely punctured ; the 

 second segment is about one-fourth longer than wide, but not much narrowed 

 at the base, sparsely weakly punctured. The trophi are ver)' long, the maxillae 

 reaching slightly beyond the ape.x of thorax. The basal two joints of the 

 maxillary palpi are clearly thicker than the others, which are long and slender; 

 the penultimate joint of the labial palpi is very long and slightly nodose at 

 the apex, the last is about six times longer than wide. Mandibles long, with 

 two teeth behind the apical, the posterior being less distinct than the second. 

 Labrum large, projecting, longer than wide, its apex rounded. 



Saussure (Syn. Am. Wasps, 367) describes two species of Leptochilus: 

 falla.r Sauss., of doubtful origin, and oriiatus Sauss. from Carolina. The 



