376 Dr. J. L. Leconte on Cvleopt&ra 



tice late rotundatis, versus basin paulo obliquis vix subsinuatis, 

 angulis posticis rectis, basi truncate ; elytris thorace vix latiori- 

 bus, utrinque seriebus tribus punctorum solitis, externa minus 

 distincta. 

 Long. 10 millim. 



One male. The first three joints of the front tarsi are 

 clothed beneath with an elongate oval brush of dense hairs. 



This species differs remarkably from A. cor data by the pro- 

 thorax being scarcely perceptibly naiTowed behind ; it, in fact, 

 resembles in miniature a Colymhetes of the group Meladema ; 

 but the ungues of the hind feet are equal and moveable, and 

 much longer and more divergent than in Agahus — precisely, 

 in fact, as in Anisomera cordata. 



Platycekus. 



Platycerus ccerulescens, Lee. Proc. Acad. Nat. Sci. Philad. 

 1861, p. 345. 



A remarkably well-developed (^ (14 millims. long excluding 

 the mandibles) is contained in Mr. Matthews's collection : it is 

 much larger than the type, which was found at Fort Tejon, 

 California, but agrees with it in form and sculjDture; it is 

 easily distinguished from P. quercus by the beautiful purple- 

 blue colour of the elytra, by the tooth on the upper edge of 

 the mandibles near the tip being prominent, and by the apex 

 not being dilated and subserrate, as in that species, but only 

 slightly emarginate. 



Ceruchus. 

 Ceruchus striatus^ Lee. Proc. Ac. Nat. Sc. 1859, p. 55. 



The only male of this species I have seen is one of the 

 valuable acquisitions of Mr. Matthews : it is larger (16*5 

 millims. long) than C. piceus^ as might have been anticipated 

 from the larger size of the female ; the elytral stride are very 

 strongly marked, as in the female, and the intervals convex 

 and coarsely punctm-ed ; the frontal excavation is much 

 smaller and more anterior than in C. piceus S ] the mandibles 

 are stouter, more cmwed, and the tooth at the middle of the 

 upper edge is very much broader, its base extending nearly to 

 the base of the mandible. In both sexes the middle thighs 

 are furnished beneath with a large patch of long yellow hair ; 

 and in the male the middle tibise are also clothed with long 

 yellow hair on the inner face from the middle to the tip — 

 characters not observed in C. piceus, which has in those places 

 only a few scattered hairs. 



A fine male specimen, collected in El Dorado, co. Cala., 



