222 p. CAMERON. 



Ancistrocerns fulvicarpus sp. nov. 



Black ; the clypeus excejit for a pyiiforni black mark in the centre of the upper 

 half, it being narrow above, becoming gradually obliquely narrowed to the apex, 

 which is broad and rounded, a small mark, widened in the middle, over the an- 

 tennte, a narrow, longish mark on the base of the mandibles, a small mark, 

 longer than wide, at the eyes, opposite the antenna, a short line on the top of the 

 upper orbits, the basal half of the prouotum, two large marks narrowed on the 

 innerside, on the apical half of scutellum, postscutellum, the sides of metanotum 

 broadly, the lines dilated on the innerside above, a large, oval mark below the 

 tegulse, and the greater part of the abdomen, yellow suffused with rufous; the 

 following parts of the abdomen are black: the basal slope of the first segment, 

 this part continued on to the apical half of the apical part ; the base of the mark 

 is narrowed, of equal width and is nearly as long as the dilated apex, which be- 

 comes gradually wider, the basal third of the second segment, this line having 

 attached to it by a short pedicle a line of the same width, which does not extend 

 to the sides, its outer edges being obliquely narrowed ; the third is broadly black 

 at the base, the last at the apex and entirely below ; the first ventral is entirely 

 black; the second, except broadly at the apex, the middle of the black being 

 broadly incised. Legs of a more rufous yellow ; the coxse, trochanters, basal half 

 of the four anterior femora and the posterior to near the apex black. Wings 

 hyaline, the base suffused with fulvous, the apex with fuscous violaceous, the 

 costa and stigma fulvous. 9 • Length 11 mm. 



Clypeus broadly pyriform, as wide as long, its apex transverse. Head and 

 thorax closely puuctnred, thickly covered with long fuscous pubescence. Base 

 of thorax transverse, the sides not projecting. Apical half of mesonotum with 

 two distinct furrows. Apex of scutellum with a short, broad, almost smooth 

 line dowu the centre. Base of postscutellum raised, coarsely rugosely punctured, 

 the apes smooth, broadly rounded. Sides of metanotum with a bordering keel ; 

 the upper half rounded, the lower separated from it, through its projecting, the 

 top of the projection rounded and much more prominent than the rest. Centre 

 of metanotum finely, obliquely striated. First abdominal segment cup-shaped, 

 punctured, but not strongly ; the second .square, more strongly punctured, espe- 

 cially at the apex, which is broadly reflexed, as is also the third. Antennal 

 scape rufous-yellow, l)lack above. 



Southwest Colorado; June (Oslar). 



'Ancistrocerns simulator sp. nov. 

 Black; the clypeus, mandibles broadly at the base, a small transverse oval 

 spot, with a short pedicle below above the antennfe, a small spot at the eyes oppo- 

 site the antennae, a short, irregular line on the top of the outer orbits, the base 

 of pronotum, the lateral widened parts semicircular, tegulse, two transverse 

 marks, narrowed on the innerside, on the base of the scutellum, the basal half of 

 postscutellum, a moderately broad line on the sides of metanotum, its top dilated 

 inwardly distinctly, the lower part much more narrowly, a mark, twice longer 

 than wide, below the tegula;, its top oblique, the apex rounded, and the greater 

 part of the abdomen, sulphur-yellow ; the black basal slope of the first abdominal 

 segment broadly projecting over the slope above, this part incised latejally at the 

 base, the incision .shorter than the central i)art, the black apical projection being 

 about half the width of the central part, the black on the second occupies almost 



