362 PROCEEDINGS OF THE ACADEMY OF 



Similar to the last in size, form and sculpture, but the dorsal carina of the 

 prothorax is well marked. Long 4-5 mm. Texas, Illinois. (Two speci- 

 mens) , 3. carinulatus L(c. 



Less shining; punctures of elytra soaaller and closer; prothorax more 

 equally rounded on the sides, not broader than long, without dorsal carina ; 

 beak moderately long, stout, curved, punctured. Long. 4-5 mm. Kansas. 

 (2 specimens) 4. transversus Sny. 



3. Black bronzed, shining ; prothorax not longer than wide, very slightly 

 narrowed from the base, much rounded near the tip, dorsal carina not obvi- 

 ous. (Resembles B. subaeneus, but differs by the more full thorax, rather 

 stouter form, and less irregular interstitial punctures of the elytra.) Long. 

 4 — 4-5 mm. Middle and Southern States 5. tumescens. 



Smaller, black bronzed, shining ; prothorax not longer than wide, more 

 obliquely narrowed at tip and less rounded, dorsal carina not obvious ; elytral 

 striae less strongly punctured than in B. tumescens; intervals with rows 

 of well marked or very fine punctures. Long. 3 mm 6. confinis. 



Black bronzed, very shining, prothorax more sparsely punctured, slightly 

 narrowed from the base, broadly and obliquely rounded near the tip ; elytra 

 more finely and less deeply striate, intervals wider, nearly smooth. Long. 



2-5— 3 mm. Louisiana 6. a e r e u s iScA. 



4. Bluish black, shining ; prothorax not longer than wide, obliquely narrowed 

 from the base, broadly rounded near the tip, punctures more distant than 

 usual, dorsal carina not obvious ; elytral striae scarcely perceptibly punctured, 

 interstices nearly smooth, or with rows of very small punctures. Long. 

 4-25-4-75 mm. Middle and Southern States; five specimens. (DifTers from 

 .6. af?-«ws in color and in form of prothorax.) 7. i n t e r s ti t i a 1 i s ^Soy. 



Black, shining ; body narrow, prothorax longer than wide, sides broadly 

 rounded in front, disc strongly punctured, without dorsal carina ; elytra with 

 a feeble oblique impression near the base, striae scarcely punctured ; inter- 

 stices with rows of very fine punctures. Long. 3-5 mm. California; two 



specimens ; San Francisco 8. m ac e r Lee. 



A— b. 



(The beak is longer and more slender than in A — a, and the thorax 

 is transversely impressed near the tip, at least on the sides ) 



Prothorax at base nearly as wide as the elytra. 1. 



Prothorax at base narrower than the elytra; black, shining, very coarsely 

 sculptured, elytral intervals not wider than the strise, and marked with single 

 rows of deep punctures. Long. 5'5-6-5 mm. Illinois, Kansas, Arizona. 



9. striatus Say. 



1. Body nearly glabrous, color black, 2. 



" " color bright brown, 8. 



Body rather robust and convex, brownish black, more pubescent than 

 ■usual; prothorax wider than long, gradually narrowed from the base and 

 feebly rounded on the sides ; elytral intervals with rather confused rows of 

 somewhat transverse punctures. Long. 4 — 5 mm. Kansas. (Resembles in 

 appearance a Cenlrinus) 10. farctus. 



Body robust, black, more pubescent than usual, prothorax wider than long, 

 feebly narrowed from the base, sides much rounded in front almost straight 

 behind, very densely and coarsely punctured, with a slender carina ; elytral 

 intervals wider than the strise, densely and confusedly punctured. Long. 

 4 mm. California, 3 specimens. S.Diego IL d e n s u s i/ec. 



2. Prothorax with distinct smooth dorsal line. 3. 



" without " " " 6. 



3. Elytral intervals usually not wider than the striae, with rows of very 

 strongly marked punctures; body larger and wider. 4. 



Elytral intervals wider than tbe striae, with single rows of finer shallow 

 punctures ; body smaller and narrower. 5. 



[Dec. 



