294 MEMOIRS ON THE COLEOPTERA 



isolated as a rule, coarse, close and rugose basally; antennae very 

 slender, pale in color, barely at all longer than the body in the female. 

 Length (9) 24.5 mm.; width 7.0 mm. Wisconsin (Bayfield), 

 Wickham. [marmoratus Rand., fantor Lee., and acutus Lacord.]. 



marmorator Kirby 



Clamator Lee., of which I have typical examples before me, does 

 not differ in any way from maculosus; strenuus is very much larger 

 than any example of a large series of maculosus at hand from various 

 localities and, having in view the longer antennae, with very stout 

 and evenly sculptured basal joint, very densely sculptured front and 

 other characters, I believe that it will prove to be specifically 

 different; if not it can readily be reduced to the status of a sub- 

 species or variety. Obtusus, which has been suppressed in the 

 catalogue, is a widely isolated species; it differs from related forms 

 in the scutellum, among many other features, this being completely 

 glabrous, excepting a few hairs at base, in all six of the well preserved 

 examples in my collection; they were collected by Mr. Koebele. 

 Angusticollis is peculiar in its small size, very narrow form, feebly 

 developed thoracic spines, sculpture of the elytra and very short 

 male antennae. Resutor Kirby and mutator Lee., were described 

 from the regions about Lake Superior and are unquestionably the 

 common eastern scutellatus of Say; so it is certain that the evidently 

 different and much stouter, very much more densely sculptured 

 mountain form, named monticola above, has not been described 

 hitherto but mingled in collections with scutellatus; when carefully 

 segregated the differences become very obvious. In associating 

 mutator with maculosus and oregonensis with scutellatus Dr. Horn 

 (Tr. Am. Ent. Soc., 1885, p. 193) has exactly reversed the reality, 

 mutator being a synonym of scutellatus and oregonensis a valid species 

 near maculosus; it is in no way related to scutellatus. 



Ptychodes Serv. 



This genus is introduced merely to state that the species we have 

 been calling vittatus Fabr., is trilineatus Linn., as determined by 

 Bates in the "Biologia." The opportunity is further taken, how- 

 ever, to state that the Arizona species described by the writer 

 under the name abbreviatus and arbitrarily suppressed in our cata- 

 logue, is based upon a well preserved example but female and not 

 male. On again comparing it with three females of trilineatus from 



