NATURAL SCIENCES OF PHILADELPHIA. 377 



narrowed behind, hind angles obtuse rounded, basal impressions with a few 



scattered punctures, bead of lateral margin pale 4. fuliginosus. 



5-5 mm. Black shining, base of antennae and feet ferruginous, elytra slightly 

 iridescent, margin brown ; prothorax with the lateral bead brown, feebly nar- 

 rowed behind, hind angles much rounded, basal impressions rounded, impunc- 

 tured 5 pie b ej u s. 



3-5 — 4-5 mm. Smaller, piceous shining, sides of elytra and disc of protho- 

 rax frequently ferruginous, base of antennae and feet ferruginous ; prothorax 

 feebly narrowed behind, hind angles very much rounded, not at all apparent ; 

 basal impressions small, rounded, feebly impressed, impunctured, 



6. c o n j u n c t u s. 



4-5 mm. Similar to co?iJunctus, but narrower; black shining, margins of 

 prothorax and elytra brown, base of antennae and feet ferruginous ; prothorax 

 scarcely wider than long, not narrowed behind, hind angles much rounded, not 

 at all apparent, basal impressions punctiform 7. r o t u n d a t u s. 



B. 



Body more slender, prothorax evidently narrower than the elytra, front tarsi 

 of male moderately dilated, 4th joint deeply bilobed, middle tarsi of male not 

 dilated ; elytra with long scutellar stria, more or less iridescent ; base of an- 

 tennae and feet pale ; hind angles of prothorax obtuse rounded. 



a. Elytra more finely striate, middle tarsi of male with two rows of squami- 

 form papillae. (Pacific species.) 



* Striae deeper towards the tip. 

 6 mm. Blackish, with the margins paler ; prothorax wider than long, 

 scarcely narrowed behind, br.sal impressions broad, very feebly punctured. 



8. a n c e ps 

 6-5 mm. Elytra black, with narrow pale margin ; prothorax scarcely wider 

 than long, narrowed behind, basal impressions faint, feebly punctured, disc 

 yellow, with a large, somewhat bi-lobed black spot (el^'tral stri;e deeper than 



in the preceding and next species) 9. c i n c t i c o 1 1 i s. 



** Striae not deeper towards the tip. 

 4-5 — 5-27 mm. Beneath and head blackish, antennae, feet, prothorax and 

 elytra testaceous ; prothorax wider than long, narrowed behind, basal im- 

 pressions narrow, not punctured; elytra with a faint dusky cloud behind the 

 middle 10. uuicolor 



b. Elytra more deeply- striate, stri;? deeper towards the tip, middle Uirsi of 

 male without rows of squamiform papillae. 



8-5 mm. Larger, blackish, with the margins paler ; prothorax wider than 

 long, with the basal impressions broad, finely punctured 11. f 1 a v i p e s. 



5-5 — 5-75 mm. Smaller, blackish, narrow margins paler, prothorax scarcely 

 wider than long, basal impressions broad, spaisely but less finely punctured. 



12. ochropezus. 



5-5 — 7 mm. Prothorax testaceous, hind angles more rounded, basal im- 

 pressions sparsely punctured ; elytra iridescent black, with very wide testaceous 

 side margin 13. d i s s i m il is. 



C. 



Small species of elongate form ; front tarsi of (^ moderately dilated, fourth 

 joint deeply emarginate, middle tarsi feebly dilated, with two rows of squami- 

 form papillae ; elytra with long scutellar stria, base of antenna; and feet pale ; 

 hind angles of prothorax obtuse or subrectangular, less rounded than in B. 



a. Elytra with but one dorsal puncture, as usual, on the second stria ; hind 

 angles of prothorax obtuse, somewhat rounded ; frontal suture more 

 distinct than usual. 



1868.J 25 



