DESCRIPTIONS OF NEW SPECIES. 21 



size as T. tripunctatus and vivax; more convex than the first, and 

 with the sides of the thorax much more rounded than the second. 



C\EMIDOTlS III. 



66. C. milticus. Breviter ovatus utrinque obtuse attenuatus, con- 

 vexus, flavo-testaceus, thorace grosse punctato, ad basin maculis duabus 

 nigris ornato, elytris griseo-testaceis, punctis nigris antice grossis postice 

 subtilioribus striatis, maculis indeterminatis nigris, apice subtruncati.s ; 

 coxis postiois inargine postieo late rotundato. Long. -1(3. 



Middle and Western States. Precisely similar in form and sculp- 

 ture to G. 12-pmictntus, but differs by the hind coxtc not having a 

 prominent angle on the hind margin; the spots of the elytra are 

 very badly defined in all my specimens, but appear to be situated 

 as in G. 12-punctatus) the elytra are not sinuate near the tip, but 

 only very slightly and obliquely truncate. 



67. C. edentulus* Ovatus convexus, postice minus obtuse attenu- 

 atus, flavo-testaceus, thorace grosse punctato, ad basin maculis duabus 

 nigris notato, elytris griseo-testaceis, sicut in priore nigro-punctatis, 

 maculis utrinque sex communique subapicali nigris, apice subsinuatis ; 

 coxis postieis margine postieo late rotundato. Long. '16. 



Kanzas, near the Rocky Mountains. Not so broad as the pre- 

 ceding species, with the hind extremity nearly acute, and the elytra 

 obliquely subsinuate at tip, as in G. 12-punctatus \ the spots are 

 well defined and arranged as in that species. 



HYDROPORUS Clairv. 



6S. H. rotuiidattis. Elongato-ovalis, pallidas opacus, confertissime 

 subtiliter punctulatus, thorace lateribus valde rotundatis, cum elytris 

 angulum formante, margine tenui antice et postieo, maculisque duabus 

 basalibus nigris, elytris apice oblique truncatis et denticulo externo 

 armatis, sutura, linea subsutiirali interrupta, tribus utrinque dorsalibus, 

 guttisque duabus internis, et tribus externis ornatis. Long. •10. 



Toronto, Canada; collected by Mr. Coupcr. This species re- 

 sembles in form several European ones, but is quite different in its 

 markings. The suture is black: very near to the suture is a nar- 

 row black line reaching neither base nor tip, and interrupted at 

 the second third of its length: on each elytron are seen besides 

 three narrow black lines reaching neither base nor tip, the outer 

 one being abbreviated about the 2d third, and the inner one inter- 

 rupted behind; on the inside of the inner line and joined to it are 



