278 GEO. H. HORN, M. D. 



densely punctured on the disc. Scutellum sparsely punctured. Elytra longer 

 than wide conjointly, a little narrower toward apex, surface more sparsely and 

 finely punctured than the thorax. Abdomen punctured similarly to the elytra. 

 Prosternum coarsely and densely punctured, body less densely, abdomen moder- 

 ately densely and more finely. Length .08— .14 inch; 2—3.5 mm. 



The males have the additional pygidial secrment. 



The nearly square thorax and comparatively large head distinguish 

 this species from any other in our fauna. It varies considerably in 

 color and size, so that the larger pale and the smaller dark specimens 

 might easily be mistaken for distinct species. 



Under this name I feel compelled to unite several species which 

 Murray retains in a feeble manner as distinct. (J. luridus Murr., is 

 certainly not distinct from mutilatus, while dimidiatus is a smaller 

 form of darker color often more sparsely punctured. A study of 

 Murray's descriptions with the known tendency of that author to 

 multiply species on a slender basis, leads me to believe that not only 

 these but as many more species should be suppressed. 



This species occurs everywhere in our country excepting the Pacific 

 coast. Its original habitat was probably the West Indies, but it is 

 now cosmopolitan. 



C nielanopterus Er. — Oval, moderately robust, entirely pale ferruginous 

 beneath and above, elytra usually piceous, the epipleurse pale. Head moder- 

 ately densely punctured. Thorax one-third wider than long, narrowed in 

 front, sides feebly arcuate, hind angles small retracted, base slightly sinuate 

 near the hind angles, disc convex, surface densely punctured, more finely than 

 the head. Scutellum rather sparsely punctured. Elytra conjointly a little 

 wider than long, slightly wider posteriorly, punctured similarly to the thorax. 

 Abdomen above sparsely punctured and more finely than the elytra. Pro- 

 sternum coarsely not densely punctured, body coarsely and more sparsely, 

 abdomen rather finely. Length .16 inch; 4 mm. 



The middle tibiae in the two sexes are similar. 



C. rufus Murr., is a variety with the elytra ferruginous. 



Occurs in Georgia, Texas and Mexico. 



C tenipestivus Er. — Oblong, moderately elongate, pale rufous, suture 

 and tip of elytra often narrowly piceous, shining, glabrous. Head sparsely 

 punctate, antennse pale, club piceous. Thorax broader than long, apex and 

 base truncate, sides feebly arcuate, near base distinctly sinuate, hind angles 

 retracted, small but acute, disc subdepressed, sparsely punctate. Elytra a little 

 longer than wide conjointly, slightly narrowed at apex, surface a little more 

 coarsely punctate than the thorax. Abdomen above a little more sparsely and 

 finely punctured than the thorax. Prosternum smooth at middle, sparsely 

 punctured at the sides, body and abdomen sparsely punctate. Length .08 — .10 

 inch; 2 — 2.5 mm. 



There are no special sexual characters. 



