194 E. T. CRESSON. 



with broad yellowish annulus ; sutures of thorax, tips of posterior 

 femora and of their tibiae, and sometimes the base and tip of apical 

 segments of abdomen, black; abdomen narrow, polished, subcom- 

 pressed at tip. Length 9 .55 inch. 



This and the next species seem to belong to Wesmael's subgenus 

 Limerodes. 



33. hiulcus, Cress. Proc. Cal. Acad. 1877, 9 . 



Ilab. — British Columbia. Same form and appearance as anceps, 

 but the flagellum is without a pale annulus, being ferruginous with 

 blackish tip. Length § .48 inch. 



34. ? concinnus, Say, Contrib. Macl. Lye. i, p. G8 % (not 9 ). 

 Mab. — N. C, 111. A slender black species with very large buccate 



head, long antennae and bispinose metathorax ; the head, thorax and 

 abdomen are marked with white; wings clear; legs slender and honey- 

 yellow ; the antennae which are thickened at tips, have each a broad 

 whitish annulus beyond the middle; scutellum raised, but not gibbose, 

 sides strongly carinate. Length % 9 .42 inch. 



This species and the next {ornatus) will probably form a new genus, 

 being intermediate between IIopHsmenus and Amhii/teles. The speci- 

 mens before me agree precisely with Say's description of /. concinnus, 

 except that of his 9 , which is evidently a Cri/ptus, the ovipositor be- 

 ing nearly half the length of the abdomen. 



35. ? ornatus. 



Hopllsmenus ornatus, Cress. Trans. Am. Ent. Soc. ii, p. 92, 9 . 



Hah. — New York. Head and thorax black, elaborately ornamented 

 with white; scape, legs and abdomen ferruginous; antennas long, 

 slender, flagellum black with a broad white annulus; metathorax with 

 two sharp spines; wings clear. Length 9 -35 inch. 



This is not an Iloplismenua as defined by Wesmael, the scutellum 

 being flat, and the last ventral segment is not retracted. 



TROGUS, Grav. 

 ^. — Abdomen flattened above, the segments strongly constricted at base; head nar- 

 roioed beneath, cheeks flat. 



Body entirely black; tibiae and tarsi yellow 1. Tulvipes. 



Body black and ferruginous, fulvous or yellow. 

 Thorax more or less black. 



Wiugs dark fuliginous; abdominal segments two to five with discal 



black spot 2. Edwardsii. 



Wings and abdomen yellow 4. flavipenuis. 



Thorax entirely ferruginous; abdomen ferruginous, black at tip; wings 



yellow, with two broad black bands 3. fascipennis. 



Body entirely fulvo-ferruginous; wings dark fuliginous 5. exesorius. 



