AMERICAN HYMENOPTKRA. 211 



two-thirds of the iiiesonotum, and there is an irregular one heh)vv the middle of 

 mesopleurse. The yellow on the postscutellum is obliquely narrowed at the base, 

 the middle there is slightly incised. Metanotum above strongly punctured ; the 

 lower part and the pleurae strongly aciculated ; the sides are rounded. Abdomen, 

 except the basal slope, closely, strongly punctured; the apices of the first and 

 second more strongly punctured, but not reflexed. The antennae are stout, be- 

 come thicker towards the apex, have the scape yellow below, the apical two 

 joints below and the hook brownish; the hook reaches clo.se to the base of the 

 penultimate joint. The second abdominal segment is slightly, but distinctly 

 longer than it is wide at the apex. 



Ormsby Co., Nevada. 



Comes near to A. ormsbye)i.sis Cam. and A. cjunnisonensis Cam., 

 both of which may be separated from it by the head and thorax 

 being densely covered with fuscous hair and by the second segment 

 not having two yellow spots. 



Ancistrocerus satyrns sp. nov. 

 The punctuation \& -as, \n anthens ; the incision on the clypeus is rounded, not 

 gradually narrowed; the striation on the metanotum is stronger, more regular 

 and oblique; the marks on the second abdominal segment are broader and dis- 

 tinctly narrowed at the base, the segment itself being shorter compared with the 

 width. All the coxse are yellow below ; the mark below the tegulse is longer 

 than wide, rounded and narrowed at the top and bottom ; the frontal mark is 

 large, the narrowed lower part is clearly separated ^id is shorter than the dila- 

 ted upper; there is a furrow down the middle of the scutellum and a wide, 

 irregular oblique one on the base of mesopleurse below the middle. Total length 

 6 mm. 



Ormsby Co., Nevada. 



This species is very like A. antheus, having the same brigiit sul- 

 phur-yellow marks; the two may be separated as follows: 



The four anterior femora broadly black at the base, the yellow on postscutel- 

 lum obliquely narrowed laterally at the base, the middle not trans- 

 verse, slightly incised ; the line on basal aljdominal segment not dis- 

 tinctly dilated laterally antlieii»i. 



The anterior femora narrowly black at the base, the middle without black ; 

 the yellow on postscutellum broadly rounded at the base : the line on 

 second segment broadly dilated laterally saty riiM. 



^^iicistrocerus lit.yriis sp. nov. 

 Black ; a line or three spots on the to[) of the clypeus, a small spot over the 

 antenna', an obscure one in the eye orbits, the underside of the antenna! ccape, 

 a short line near the top of the outer orbits, two broad marks on the pronotum, 

 postscutellum, a large mark on the sides of the base of metanotum, a broad coni- 

 cal mark on the pleurte below the tegulse, a line, dilated laterally on the apex of 

 the first abdominal segment, a similar line, extending on to the ventral surface, 

 on the second, a broad, conical mark — the transverse end at the base — near the 

 base of the second and narrower lines on the third to fifth segments, yellow. 



TEANS. AM. ENT. SOC. XXXIV. .JUIA', 190b. 



