18 LE CONTE.— COLEOPTERA OF THE 



Trichodes bibalteatus, elongatus, rufo-pilosus, supra dilute rubidus, capite thoraceque longius villosis, 

 elytris grosse confertim punctatis, fascia ante medium alteraque latiore ad dodrantem nigris ; subtus niger 

 antennis rufis clava fusca. Long. *63. 



One specimen, Texas, Mr. Ulke. Related to T. apivorus, but narrower, and 

 with no apical black spot on the elytra ; the hair is also different in color, being reddish, 

 while in T. apivorus it is black. 



Microschatia sulcipenuis, ovalis, convexa, atra opaea, tborace parce punctato antrorsuui angustato 

 lateribus rotundatis marginatis, ad basin late rotundato utrinque sinuato, angulis posticis paulo productis 

 subrectis, elytris sutura costisque utrinque 5 elevatis, lma 3iaque postice confluentibus 2nda 4taque 

 utrinque abbreviatis, hac cum 3ia postice connexa, sulcis punctis quadratis magnis cribratis. Long. '60. 



One specimen, Llano Estacado, Capt. Pope. The mentum is large, leaving be- 

 tween its sides and the mandibles only room for the palpi; the antennae are stout, 

 with the last joint very small, and the tarsi are thick, thus agreeing in generic characters 

 with M. inaaqualis. The presternum is also broad and slightly produced as in 

 that species. The abdomen is sparsely and not coarsely punctured. 



Philolithus Lac. 



In advance of the publication of the fifth volume of his work on the genera of 

 Coleoptera, Prof. Lacordaire has sent me his description of the characters of this new 

 genus, which contains all the species described by me as Pelecyphorus. Though 

 agreeing with that genus in the form of the mentum, which leaves a free space each 

 side, more than sufficient for the movement of the palpi, it differs in the anterior 

 tibiae not being produced into a spine at the outer apical angle. Such at least is the 

 only distinct difference noted in Prof. Lacordaire's description; and the only one that 

 I have found in comparing specimens of Pelecyphorus mexicanus Sol., kindly sent 

 me by Mr. Salle. An unnamed Mexican species, related by form and sculpture to 

 P. mexicanus, also sent me by Mr. Salle, does not show any trace of this spine, while 

 in P. confluens, hirsutus, and especially in P. rimatus, this spine, or rather prolonga- 

 tion of the apical angle is quite distinct. Under these circumstances, though I have 

 adopted the genus proposed by my learned friend, I am greatly in doubt whether it 

 will not be necessary to recombine it again with Pelecyphorus, the species of which 

 being numerous and very different in form, may be divided into several natural 

 groups, according to the form of the antennae and tarsi, and the sculpture of the 

 elytra. 



The table of the relation of genera of Asidites, as sent me by Prof. Lacordaire is 

 as follows : 



I. Antennae 11-articulate; inaxillse rarely visible. 



a. Anterior tibiae cylindrical : tbe apical external angle not prominent. 

 h. Mandibles separated from the submcntum by a distinct interval. 



Base of elytra emarginate in the arc of a circle Microschatia. 



