Rev. H. Clark on the Mexican Species of Hydropori. 175 



2. H. Leconteii, n. sp. 



H. subovatus, rotundatus, punctatus, nigro-ferrugineus ; capite 

 nigro ; thorace rufo-ferrugineo, antice et postice nigro marginato ; 

 eljtris rufo-ferrugineis, obscure nigro-fuscatis ; antennis pedibus- 

 que rufo-flavis. 



Long. Corp. \l lin., lat. |-^ lin. 



Perceptibly narrower than H. Portmanni, and somewhat more 

 convex ; in the single c^ example before me the surface is very 

 dull and opake : it is a question whether this is sexual,, as in 

 many other species. The surface of the elytra, when viewed 

 under a high power, is sparingly and distinctly punctate ; other 

 very minute and frequent punctures give to the surface the 

 appearance of delicate granulation. 



H. Leconteii closely resembles a species (I believe unde- 

 scribed) which I have received from Florida, and which must 

 apparently be placed near H. farctus, Lee. 



I name this species after Dr. Leconte of Philadelphia, who 

 has carefully studied the Hydrocantharidse of North America, 

 and to whose excellent papers in the ' Proc. Acad. Nat. Sciences' 

 and in the ' Annals of the Lyceum of Nat. Hist, of New York ' 

 we are indebted for nearly all that is known of the many inter- 

 esting species of this vast continent. 



Mexico ; the exact locality unrecorded. A single specimen, 

 taken by the late M. Truqui. 



3. H. Bryanstoniij n. sp. 



H. latus, subcircularis, depressus, subtiliter punctatus, glaber, rufo- 

 ferrugineus ; thorace rufo-fusco ; elytris utrinque ad suturam 

 breviter et tenuiter striatis. 



Long. corp. 1 lin., lat. | lin. 



Broad, subcircular, depressed, glabrous, finely punctate, rufo- 

 ferruginous : head broadly transverse : thorax broad, the sides 

 somewhat rounded and much constricted in front; the sur- 

 face is very finely punctate, in colour rufo-fuscous, the medial 

 disk being always darker than the sides : elytra broad, sub- 

 depressed, finely punctate, glabrous ; near the suture is, on either 

 side, a short and indistinctly punctured stria ; the surface is 

 ferruginous or rufo-ferruginous in colour : abdomen and under- 

 side black, the mesothorax being rufous : legs rufous : antennae 

 pale rufous. 



This species varies but little in coloration, and apparently is 

 not rare. I have specimens before me, from Mr. Fry's cabinet, 

 received from M. Truqui, and also from my own, which I ob- 

 tained through Mrn Stevens : all the examples manifest the same 

 ferruginous colour. It may be distinguished by its almost cir- 

 cular depressed form, \Uglabrous surface, and the short and almost 



