AMERICAN hy;vienoptera. 22o 



the basal three-fouitlis ; the apical (and larger) part is narrower and longer than 

 the basal, which extends to the outer edges; at the junction of the two is a long- 

 ish triangular incision, which becomes gradually narrowed to a fine point on the 

 inner; the third to fifth segments have black lines, dilated near the outerside. 

 on the base; the last immaculate; the first ventral is black; the second with a 

 large tripartite mark on the base ; the central division is the larger, is triangular, 

 with ragged edges; the lateral are curved, oblique, broadly, roundly dilated in 

 the middle on the outerside; the others (except the last, which is entirely black 

 are black at the base, the bands roundly dilated on tlie sides. Legs pale suljihur- 

 yellow, the tarsi and apex of tibiae fulvous; all the coxie and trochanters, the 

 base of the four anterior femora narrowly and the posterior to near the apex, 

 black. There is a black spot in the centre of the upper three-fourths of the 

 clypeus ; it becomes gi-adually widened to near the bottom, when it again becomes 

 roundly narrowed to a fine point below. Wings fulvous-hyaline, the apex from 

 the first transverse cubital uervure smoky violaceous; the nervures and stigma 

 fulvous. 9- Length 12 mm. 



Head, thorax and base of abdomen densely covered with long fuscous pubes- 

 cence. Clypeus pyriform, as broad as long, its apex with a shallow incision. Base 

 of thorax transverse, the sides not projecting. Apex of mesonotum with two 

 distinct furrows. Apex of postscutellum transverse, smooth. The sides of meta- 

 notum below the middle project into a blunt triangular tooth. First abdominal 

 segment cup-shaped ; the second wider than long ; the puncturation on the first 

 and second weak ; on the apex of the latter it is stionger, aiid it is still stronger 

 on the others. Underside of antenual scape yellow, of the flagelluni brown. 



Ormsby Co., Nevada, July (Baker). 



Allied to A.fulvitarsis and A. falvicarpus ; it may be known from 

 both by the wide, clearly separated transverse bar at the end of the 

 black base of the abdomen ; the latter may be further known by the 

 second abdominal segment being black, exce])t at the apex ; fulvi- 

 tarsus by the clypeus being black, except at the sides above and by 

 the sides of the metanotum being not lined with yellow. 



Odyueru!^ ( Ancistrocerusi acaiitlio|>iii>» sp. nov. 



Black; anteunal scape below, a broad curved line with its lower sides narrowed 

 aud dilated downwards on the top of the clypeus, two small spots in the centre 

 above the apex, an irregular oval mark on the front, a mark in the eye incision, 

 widened above, narrowed below, a mark three times longer than wide on the 

 top of the outer orbits, a longish mark on the base of the mandibles, a broad line 

 on the base of the pronotum, the greater part of the tegulte, a short oblique line 

 on the mesonotum close to their apex, an irregular mark in the centre of the 

 apex of the mesonotum, postscutellum, a small lateral mark on the base of the 

 metanotum, a broad, irregular mark on the sides of the apical slope, a large 

 irregular mark on the pleurte below the tegulai, a small mark on the first abdo- 

 minal segment on the sides near the basal slope, a band on the apex of the first 

 abdominal segment, widened in the middle and directed backwards at the sides, 

 a large, oblique spot on the sides of the second, nearer the middle than tlie base, 

 a broad band on the apex of the second and narrower ones on the others, bright 



TEANS. AM. ENT. SOC XXXIV. JULY, 1908. 



