glandular pubescence of the basal joint of the protarsus in the male to 

 a small apical area recalls a similar condition in scmivittatus. As a 

 rule the basal joint is thus clothed in about its apical half. 



A. seriatus Say, Trans. Am. Phil. Soc., II, 1823, p. 97. 

 striatus Aube. Spec. Gen. 1838, p. 305. 

 arctus Melsh. Proc. Acad. Phil. II, 1846, p. 27. 

 parallelus Lee. Agass. Lake Sup., 1850, p. 213. 

 inters ectus Cr. Trans. Am. Ent. Soc. IV, 1873, p. 419. 



Elongate oval, black, aenescent, moderately strongly shining, the occipital and sub- 

 lateral elytral spots obsolete; mouth and antennae rufous, legs obscure rufous or 

 rufopiceous ; elytral reticulation fairly strong, the meshes irregular in form ; 

 minute punctures sparse, and for the most part within the meshes. Front and 

 middle tarsi of male perceptibly but not strongly incrassate, the anterior protarsal 

 claw not very strongly arcuately dilated posteriorly. Length 8 to 9.3 mm. 



This is one of the commonest, and if we have not confused two 

 or more species is perhaps the most widely dispersed of any in our 

 fauna. It is essentially a northern form, occurring entirely across 

 the continent from Newfoundland (Mts. east of Codroy) to Van- 

 couver, and in the Rocky Mt. region ranges as far south as New 

 Mexico, and across the Great Basin to Nevada, Eastern California 

 (Truckee; Lundy) and Eastern Oregon, but I have not seen it from 

 the true Pacific fauna south of Victoria Vane. Its southern limit in the 

 East is a little uncertain. It is known to occur as far south as 

 Washington, D. C, but its absence from the southwest Pennsylvania, 

 Cincinnati and Iowa lists is at least significant. 



This species shows quite a good deal of variation in form and outline. 

 Parallelus Lee. was based on one of the narrower individuals from 

 Lake Superior; similar specimens however are likely to turn up any- 

 where within' the range, and every possible intermediate is present 

 between this and the broader examples. For a like reason I have 

 felt compelled to unite inter sectus Cr. The type of this latter (from 

 Eastern Oregon) would be absolutely lost in any considerable series 

 of seriatus if locality labels were removed. The tooth of the anterior 

 tarsal claw (c?) mentioned by Crotch as a distinguishing character is 

 only a particle of adhering foreign matter, the form of the claw being 

 really precisely as in seriatus. In many of the western specimens the 

 base of the prothorax does not quite equal in width the base of the 

 elytra, so that the outline is less continuous than in what we may call 

 typical seriatus. The intersectus of Sharp's monograph was doubtless 

 one of these specimens. The size of these examples, and in fact of 

 western specimens generally is somewhat less than of those from the 

 East, but all differences are extremely elusive and so completely 

 gradational that I am at present quite unable to define a second species 

 in the extensive material examined. 



