822 Goleopterologioal Notices^ VI. 



tinguishable by sculpturnl features wliicli :ipi)oar to be virtually 

 constant and easil3' perceived, The characters made use of b}' 

 LeConte for the separation of palustris Scop. (=colon h.) and 

 geminatus,a,re not at all satisfactory, and there is every reason to 

 suppose that the species of Sa}^, is identical with the one which 

 we have heretofore regarded as colon Linn., on the authority of 

 Kirby and Schonherr. On this hypothesis the American species 

 may be defined as follows : — 



Elytral intervals alternating botli in width and convexity, separated rather by 

 continnons striie than l)v series of punctures. 

 Tlie intervals differing greatly in width hut polished and coarsely and sim- 

 ilarly rugose throughout; stritewell impressed and nu^rked by a continu- 

 ous line of white squamules; elj'tra without trace of an ante-median 



squamosespot gemellus 



The intervals alternately slightly narrower, more depressed and much more 

 finely sculptured; rostral carina broad and feeble. 

 Elytra with numerous irregular condensed areas of pale scales through- 

 out, the usual spot before the middle not distinguishable; narrower 

 intervals clothed in great part with denser brown squamules. 



errans 

 Elj'tra each with a small spot of condensed S(iuamules before the middle. 



alternant 



The intervals differing but slightly in width and convexity and similarly 



finely and rugosely sculptured throughout, the narrower intervals clothed 



in great part with darker brownish scales; elytra each with a condensed 



spot of pale scales before the middle; rostral carnia fine, strongly elevated 



and entire canadensis 



Elytral intervals mutually similar as nearly so and similarly clothed through- 

 out, separated by series of detached punctures; each elytron constivntly 

 with a small pale squamose spot before the middle. 

 Serial punctures moderately large, rounded and less une([ual among them- 

 selves. 

 Beak finely carinate throughout. 



Elj'tra about twice as wide as the prothorax, having numerous small 

 condensed spots of ochreoiis scales situated between the serial punc- 

 tures; form stout pinguis 



Elytra evidently less than twice as wide as the prothorax, the humeri 

 less exposed at base and the elytra more gradually decli\ ous luliind 



in profile; vestiture much less dense geniinatus 



Beak not carinate toward base; elytra twice as wide as the ])rotli(>rax, 



the sutural angles prominent oregonus 



Serial punctures very unequal in size and unevenly spaced, the larger elon- 

 gate, deep, perforate and very conspicuous; elytra deeply notched at apex, 

 the sutural angles promi nent perforatus 



