142 E. T, CRESSON. 



Abdomen with two basal segments black, apical corners of segments 



1 — 4 with white spot 167. lasciTUS. 



Gastrocoeli elongate, linear, subobsolete or wanting. 

 Clypeus broadly concave; abdomen fulvous, generally with fuscous 



spots on segments 2 — 4 170. w-albiiui. 



Clypeus with a more or less distinct medial impression or fovea; abdo- 

 men fulvous or ferruginous, second and following segments not 



marked with fuscous 171. duplicatus. 



Clypeus flat or subconvex, not excavate medially; abdomen fulvous, 



generally more or less marked with fuscous 175. scitulus. 



Posterior coxse ferruginous. 

 Abdomen with a more or less distinct blackish band. 



Segments 2 — 4 or 5 narrowly black at base 186. Tolens. 



Segments 2 and 3 narrowly black at apex 187. propitius. 



Abdomen without blackish bands. 



Posterior tibise black, with white annulus; tips of their femora and 



tibiae entirely blackish 172. annnlatus. 



Posterior legs entirely honey-yellow; their tibise and tarsi sometimes 

 dusky, but never with pale annulus. 

 Pleura ferruginous; metathorax with two acute spines; head fer- 

 ruginous, face pale, no orbital lines; posterior femora long and 



slender 192. iiiiicrouatus. 



Pleura whitish; metathorax with two short subacute spines; head 

 with face and broad orbital lines white; posterior femora short 

 and subrobust 197. facetusi. 



1. Orpheus, Cress. Proc. Ent. Soc. Phil, iii, p. 13G, 9 . 



Ilah. — Mass., Pa. A large, somewhat shining, black species with 

 no pale markings, except a white annulus on antenna3, and ia 

 one specimen a subobsolete spot on tip of scutellum; wings smoky. 

 Length 9 .75 inch. 



The large, subquadrate head and subsinuate anterior margin of 

 clypeus refer this and the next species to Chasmodes, Wesmael. 



2. saucius, Cress. Proc. Ent. Soc. Phil, iii, p. 137, $; Trans. Am. 



Ent. Soc. i, p. 293. 

 Ilab. — Pa., N. C. A shining black, immaculate species, with a large 

 subquadrate head ; antennae with a broad white annulus; wings fuligi- 

 nous; anterior margin of clypeus sinuate. Length 9 .GO inch. 



3. maurus, Cress. Proc. Ent. Soc. Phil, iii, p. 135, 9 . 



Uab. — Va., N. C, Ga. A large dull black species with blackish 

 violaceous wings, and scabrous postpetiole; antennae with a broad 

 white annulus. A specimen from N. C. has a short white line in front 

 of tcgulae wanting in other specimens. Length 9 .70 inch. 



