46 J. L. LECONTE, M. D. 



second joint one-half as long as the third,; seventh ventral slightly chan- 

 neled, eighth triangular, obtusely rounded at tip. Length 8 — 9 mm. ; 

 Mass.; L.Superior 2. liotlioifles n. sp. 



3. — Antennee stouter; elytra distinctly dilated on the sides, elevated lines strongly 



marked 4. 



Antennfe more slender, elytra not or scarcely dilated on the sides, elevated 

 lines indistinct ....5. 



4.— Elytra very broadly dilated, densely rugose, opake ; black, front and sides of 

 prothorax pale; head and middle of prothorax densely punctured, the 

 latter near three times wider than long, sides very broadly explanate and 

 reflexed, dorsal line feeble; antennae scarcely longer than half the body, 

 joints 2—4 increasing in length; % elytra less dilated on the sides, antennae 

 longer than in 9 . Length 11 -13 mm. ; Can. ; Pa.. .3. tricostatiis Say. 

 Elytra less broadly dilated, densely rugose, opake; front and lateral margin 

 of prothorax yellow ; head coarsely, prothorax less coarsely punctured, not 

 much wider than long, narrower in front, apex truncato-emarginate with 

 the angles subacute, side margin deeply impressed before and behind, dorsal 

 line well marked; joints of antennae 2—4 increasing in length. Length 



7— 8 mm.; Mass.; N. Y.; L. Sup. ; Ks 4. ruso«iiiIus Lee. 



Very similar to rugn/sulus ; prothorax less narrowed in front, with the apex 

 truncate and angles rounded, disc less punctured, elytra less densely rugose 

 and less opake, less dilated on the sides; % wanting. Length 8—10 mm.; 

 Va.; Ga.; Fla 5. fraler Lee. 



5.— Elytra rather coarsely rugose 6. 



Elj'tra more finely rugose 7. 



6. — Color variable, front sometimes and margins of elytra pale; head coarsely 

 punctured ; prothorax twice wider than long, sides rounded, broadly ex- 

 planate, yellow, with a large dark spot, disc sparsely punctured, dorsal line 

 distinct; antennae and legs more or less testaceous. Lengtli 8—1.'', mm.; 



Atlantic region ; Kansas 6. I»jisillari$<i Say. 



"•—Prothorax pale yellow, without spot, flavinol/i.i Lee. 

 0. — Prothorax with a spot, legs testaceous, discoideuN Lee. 

 v.— Smaller, prothorax less strongly punctured, Kaneas; punduhiius Lee. 

 Similar to ba.tUaria, but prothorax scarcely longer than wide, with nearly 

 parallel sides, rounded only near the tip, and narrower more strongly 

 reflexed side margin : piceous, base of antennae and mandibles, prothorax 



and margins of elytra pale. Length 9—11 mm 7. qnadratiis n. sp. 



a.— Head entirely black, prothorax dusky; Texas; (Belfrage). 

 Piceous, frontal fascia, sides of prothorax and margins of elytra pale; head 

 coarsely punctured behind; prothorax not much wider than long, sides 

 nearly parallel, widely explanate, disc red, coarsely and densely punctured, 

 dorsal line short, not very plain; claws more slender and more nearly 

 cleft than in the foregoing species. Length 9 mm.; Fla.; one specimen, 

 (^"•ter) 8. fissiisn. sp. 



7.— Prothorax wider than long, feebly punctured in front, sides yellow, widely 

 explanate; head not deeply punctured behind, front more or less pale; 

 rest of body black, base of antennae sometimes tinged with testaceous, 

 dorsal line usually feeble. Length 9—11 mm.; Atlantic region : L. Sup. 



9. diadem a Fabr. 

 a.— Protliorax with the disc but little darker than the sides. 



