LeConte.] 



ZYGOPIiN^I. 261 



thighs acutely toothed, liind pair with an indistinct dark band. Length 1.7 

 mm.; .07 inch. 



New York, one specimen; Mr. Guex. A peculiar species, somewhat 

 suggestive of Ceutorhynchus. The elytral strise are so wide and deep, that 

 tlie pattern which is formed by white hairs on the interspaces seems to 

 he made up of sets of very fine wliite lines. 



OOPTURUS Sch. 



The species belonging to our tauna are small and elongate, witli the 

 elytra only a little wider than the prothorax. They differ from the typical 

 species of tropical America by the femoi'a being not armed with a tooth. 

 We have seen already in many genera that this character is quite unim- 

 portant, and I consider it unworthy of even subgeneric distinction. 

 Our species may be thus tabulated: 



Second joint of funicle longer than third 2. 



" not " •' lO. 



2. Front moderately narrow 3. 



' ' very narrow, linear 9. 



8. Mottling of upper surface not very distinct 4- 



" " " very conspicuous 5; 



4. Larger, less densely clothed with scales 1. operculatus. 



Smaller, more " " " " 2, nanulus. 



5. Elytra with white markings 6. 



" each with a large dark spot 7. binotatus. 



(5. Prothorax coarsely punctured 7. 



' ' finely punctured 6. longulus. 



7. Body more slender 8, 



Body rather stout; each elytron with a conical pro- 

 cess at tip ; 3. mammillatus. 



8. Protliorax less narrowed in front 4. adspersus.* 



" less elongate, more suddenly narrowed 



in front 5. quercus. 



9. Elytra with fulvous scales and an oblique, dark, 



curved band 8. lunatus. 



10. Very small, elytra In-own with white markings 9. minutus. 



1. O. operculatus Gyll., Sch. Cure, iv, 648 ; Cryptorhynchus opevc. 

 Say, Journ. Ac. Nat. Sc. Pliila. iii, 308; ed. Lee. ii, 172. 



Western and Southern States. Tlie typical form is of larger size (4 mm. ; 

 .10 inch) than our other species, with the scales not very dense upon the 

 elytra, so that the striae are plainly seen; the spo's of paler scales are few, 

 and not conspicuous. 



2. C. nanulus, n. sp. 



This species agrees with tlie preceding in form, color and sculpture, but 

 is very much smaller, the prothorax seems a little more elongate, and the 



* I have some doubts as to the specific difference between C. quercus and ad- 

 spersus. but for the present it seems more prudent to consider them as dis- 

 tinct. 



