94 E. T. CRESSON. 



having a smooth, convex, shining space in front; pleura shining black, with a 

 large ferruginous stain beneath the anterior wing; tegulse fulvo-ferruginous; 

 wings long, ample, fuliginous, with a brilliant violaceous reflection, the base of 

 both anterior and posterior pair, a streak beyond the stigma of anterior pair, 

 and a long streak along the eosta of posterior i)air, yellow-hyaline; nervures 

 brown, costa, stigma and nervures at base of wings fulvous; areolet triangular, 

 petiolated, oblique, receiving the second recurrent nervure before the middle; 

 legs fulvo-ferruginous, tibise and tarsi varied with yellowish, coxse blackish, 

 tinged with reddish, posterior femora blackish at tip within ; abdomen longer 

 and narrower than usual, subconvex, slightly shining, especially at apex; the 

 first and second segments entirely, the third except base, and narrow lateral 

 margins of the fourth segment, fulvo-ferruginous, remainder black; first seg- 

 ment much elevated before the apex, the disk of which is sulcate; beneath ful- 

 vous, dusky at apex. Length 10 lines. 



Hab. — Dakota Territory, (Mr. Henry Ulke.) One % specimen. 



T. Copei. — %. Large, black, opaque, densely punctured; a longitudinal pale 

 spot on each side of the face; antennae tinged beneath with testaceous; meso- 

 thorax with slightly impressed longitudinal lines; scutellum convex, deeply 

 excavate at base; metathorax rugose, truncate behind, and on the disk a shin- 

 ing elevation, with a shallow medial fovea; wings large, violaceous-black, ner- 

 vures black, areolet as in obsidianator , except that it is more petiolated ; legs 

 black, anterior tibise and tarsi brownish; abdomen ferruginous, shaped much 

 like that oi obsidianator , except that it is more convex, rather more robust, and 

 the first segment much less' prominent near the apex ; petiole of first segment 

 slender, black. Length 10 lines. 



Hab. — West Virginia. One % specimen. This fine species was collected and 

 given me by my much esteemed friend Prof. E. D. Cope, to whom it is respect- 

 fully dedicated. 



T. Bolteri. — %, . Long, narrow, black ; head quadrate, not narrowed beneath ; 

 face, anterior orbits, a broad line on lower half of posterior orbits, clypeus, man- 

 dibles and palpi, lemon-yellow; antennae rather long, subserrate, black, the 

 scape yellow beneath ; tegulse, a spot before and a short line beneath each ante- 

 rior wing, scutellum, and a spot on postscutellum, fulvous; scutellum obtusely 

 elevated; metathorax rugose, much elevated on its disk, the carina across the 

 middle sharply defined, the central area very small and transverse; wings 

 yellowish hyaline, slightly dusky at tips, areolet petiolated, legs yellow varied 

 with pale fulvous, posterior coxse at base behind and their femora behind, 

 black, extreme tips of their tibise within and the apical joint of their tarsi dusky ; 

 abdomen long, narrow, sides parallel beyond the basal segment; first segment, 

 except at base, the whole of the second, the third, except a basal black band, 

 and the second to fifth ventral segments, yellowish fulvous; fourth and fol- 

 lowing segments above black ; basal segment gibbous before the apex. Length 

 lOi lines. 



ITafi.— Lake Superior. (Coll. Mr. A. Bolter.) 



T. elegans. — 9- Entirely honey-yellow, golden sericeous, more obvious on 

 the legs and abdomen ; the face, tarsi and tip of abdomen, paler colored than 

 the the rest of the body; base and tips of the antennse tinged with fuscous: scu- 

 tellum much elevated, obtuse; metathorax rugose, with indistinct elevated 

 lines, the basal middle prominent. Wings yellowish-hyaline, with a brilliant 



