OF AMERICA NORTH OF MEXICO. 149 



distinguishes this species ; the punctures of the elytra are sometimes confluent towards 

 the base ; it is difficult to determine whether this or the preceding is Mr. Kirby's 

 species. 



5. M. FAUTOR, nigro-testaceus nitidus, maculis magnis fulvo pubescentibus, alterisque parvis cinerascentibus, 



thorace sat dense punctato, elytris minus dense punctatis, basi, margine antice, tibiis, tarsis, antennisque 

 testaceo-fulvis. Long. -SS. 

 ? M. marmorator Kirby. Fauna Bor. Am. 169. 



A very distinct species, of which I found but a single mutilated female at Lake 

 Superior ; the suture is not at all spinose : the sculpture of the thorax, the most 

 distinct character in all the species, is not mentioned by Mr. Kirby. 



6. M. CLAMATOR, nigro-seneus nitidus, thorace vix fulvo-variegato, plicato-punctato, elytris grosse rugose 



punctatis, macula antica subsuturali, alterisque in fasciis tribus obliquis sitis valde pubescentibus, nigro- 

 brunneis, interstitiis parcius cinereo-variegatis, antennis nigro-piceis cinereo-annulatis. Long. '80. 



A single female from Santa Fe, of New Mexico; the scutellum is white, with a 

 black line : the suture is not spinose. 



Group 6. 



A very extensive series of genera, containing the largest and most beautiful species 

 in this division. It should probably be divided into two groups, according as the 

 sterna are prominent or not. The thorax is armed, except in a single genus 

 (Cacoplia) and even in the highest organized genera the head is as wide as the 

 thorax. The mentum is trapezoidal, and membranous at apex. The antennae are 

 widely separated, the front is concave between the antennae, and the deflexed 

 portion is short. The anterior tibiae have two very small terminal spurs, and are 

 not armed with a hook as in Pteroplia, which I have on that account separated 

 as a distinct group. 



CACOPLIA. 



Thorax non armatus, cylindricus. 



Sterna simplicia. 



Palpi articulo ultimo obconico, truncato. 



The body is narrow and cylindrical, precisely as in the next genus, but the thorax 

 is cylindrical, with the sides almost straight: the front is deeply concave between 

 the antennae, and anteriorly a little convex. The antennae are long and slender, 

 slightly ciliated beneath : the first joint is thick and cylindrical. 



1. C. PRUINOSA, testacea subtilissime scabra, brevissime cinereo-pubescens, thorace punctato, latitudine paulo 

 breviore, elytris thorace latioribus, parallelis, apice rotundatis. Long. '47. 



New York; described by Haldeman as Hebestola nebulosa, (54). 



38 



