154 [June 



basal joint beneath yellow. Thorax black, minutely punctured, shin- 

 ino-j tegulae, a spot before and a line beneath the wings, white; scu- 

 tellum flat, polished, white; metathorax entirely black, finely and con- 

 fluently punctured, opaque, the elevated lines well defined, the central 

 area moderate, subquadrate, rounded in front and obtusely indented 

 behind. Abdomen elongate, rather slender, finely and densely punc- 

 tured ; basal segment black, distinctly bilineated and finely aciculate ; 

 second and third segments bright yellow, their apical third stained 

 with ferruginous and their extreme apex obfuscated ; fourth segment 

 brown-black with a large angular yellow spot on each side, almost 

 meeting on the disk ; the two following segments black, the apical 

 ones fulvous ; beneath colored as above. Length 7 — 8 lines ; expanse 

 of wings 11 — 11^ lines. 



Hab. — Rocky Mountains, Colorado Territory. 



31. Ich. Crrotei, n. sp. 



Black: face and scutellum yellow; metathorax yellowi^h-ferrugiuous; ab- 

 domen ferruginous and yellow, banded with black ; central area of metatho- 

 rax small, transverse. 



Male. — Head black ; the face beneath the antennse, orbits, clypeus, 

 mandibles except base and extreme tips, and the palpi, yellow ; an- 

 tennae porrect, rather more than half the length of the body, brown- 

 black, basal joint beneath yellow. Thorax black, finely and rather 

 closely punctured, shining; tegular, a broad sutural line before and a 

 short one beneath the wings, an oblique line on each side of the pectus, 

 yellow or yellowish-ferruginous ; a spot on each side of the pleui'a and 

 two lines on the disk of the mesothorax, almost confiuent behind and 

 diverging in front, rufous and subobsolete ; scutellum rather convex, 

 shining, yellow, immediately behind it a short transverse yellowish- 

 ferruginous line ; metathorax almost entirely yellowish-ferruginous, the 

 elevated lines tolerably well defined, the central area small, transverse, 

 subquadrate, the posterior margin bent inwards. Wings subhyaline, 

 with a brassy gloss, the apical margin faintly tinged with fuliginous ; 

 nervures blackish, pale testaceous at base, as well as the outer margin 

 of the costa; stigma fulvous; areolet 5-angular. Legs yellow, more 

 or less varied with fuh^ous, the posterior coxas, trochanters, femora 

 and tips of the tibice fulvous, the latter obfuscated at tips. Abdomen 

 long and rather slender, densely and finely punctured, opaque-yellow, 



