NORTH AMERICAN COLEOPTERA. 157 



resented in our fauna by rohinise, Zabrotes differs in the absolutely sim- 

 ple claws. It is probable that many of the small species at present re- 

 ferred to Spermophagus should belong to the present genus. 



In addition to the characters given above the species at present known 

 have the posterior femora deeply sinuate beneath, the condyles at the 

 knee lamiform and without tooth. The tibifB of the same legs are short, 

 not longer than the first tarsal joint, the inner side with fine spinules. 



The following species are now known to me : 



Vertex very distinctly carinate. 

 A transverse band at middle of each elytra white. 



Suture of elytra and pygidium in great part white, the latter with two trans- 

 verse reniform black spots cruciger. 



Suture concolorous. 



Elytra separately rounded at tip, the band well defined spectabilis. 



Elytra subtruncate at tip, the band indistinct obliterat>U6>. 



Pubescence above uniformly dark gray. 



Punctures of thorax extremely fine and dense tleusus. 



Vertex not or very indistinctly carinate. 



Basal joint of antennae red. Pubescence all gray plaiiifrons. 



All the above species are of short quadrate form, the elytra rather flat. 

 In cruciger the sides of the elytra are more sinuate, so that the sub- 

 humeral lobe is very well marked. 



Z. cruciger n. sp. — Form quadrate robust, depressed above, black. Head 

 finely punctate, vertex carinate, sparsely pubescent. Antennae black, as long as 

 three-fourths the body, subserrate from the fifth joint. Thorax twice as wide at 

 base as long, sides rapidly arcuately narrowing to the front, moderately convex, 

 densely finely punetulate with numerous coarse punctures intermixed, pubescence 

 sparse and gray, a denser whiter space in front of the scutellum on each side of 

 which in front is a darker spot. Elytra not wider than the thorax, a little wider 

 conjointly than long, apices separately rounded, sides lobed at basal half, surface 

 striate, strise closely punctured, intervals flat finely punetulate, densely clothed 

 with black pubescence, the suture and a median slightly sinuous band white. 

 Pygidium densely punctate, densely clothed with white pubescence, a transverse 

 reniform spot on each side black. Body beneath black, clothed with gray pubes- 

 cence. Coxal plates black, very coarsely punctured at outer half. Legs black, 

 sparsely and finely pubescent. Length .10 inch; 2.5 mm. 



This is the largest species, conspicuous in the style of its vestiture, and 

 is with ohliteratus remarkable in having the coxal plates coarsely punctate. 

 One specimen, Colorado. 



Z. !$pectabilis n. sp. — General form and sculpture of the preceding species 

 but much smaller. Thorax not densely clothed with brownish pubescence with a 

 narrow whitish space at the sides and a small ante-scutellar spot. Elytra with 

 separately rounded apices, clothed with brownish pubescence, a median, slightly 

 oblique white fascia which does not reach the side or suture. Pygidium coarsely 



