788 Coleopterological Notices, VI. 



ARIOTUS n. gen. 



The body in this genus is narrow, elongate and subparallel, the 

 head not wider than the prothorax, with the epistonial suture dis- 

 tinct, the base transversely truncate and broadl}' arched, the eyes 

 moderately large, rounded, subglobular, very coarsely faceted, 

 scarcel}' at all setose and with only the slightest evidence of a 

 minute emargination, the tempora veiy short, rounded and much 

 less prominent. Last joint of the maxillary palpi short, very 

 broad, the basal angle being very obtuse, of the labial moderately 

 large, transversely subsecuriform, with the apex obliquely beveled 

 and sensitive, differing completely' from the form seen in the pre- 

 ceding genera. The antenna? ai-e rather short, slender, incrassate 

 toward apex. The prothorax is transverse!}' and feebly obtrape- 

 zoidal, not impressed, the scutellum small, narrowly trapezoidal, 

 and the elj^tra parallel and devoid of distinct impressions. The 

 middle coxae are narrowly separated, the posterior on\y slightl}' 

 more widely so, the hind femora not dilated, the corresponding 

 tibisB devoid of terminal spurs but with a porrect terminal plate 

 iuternally, apparently composed of agglutinated setse ; tarsi 

 slightly shorter than the tibite. The basal segment of the abdomen 

 is not quite as long as the remainder, without trace of dividing 

 suture, the second and third equal, and the fourth much longer 

 than the third. 



Our two species differ decidedly and may be mutually dis- 

 tinguished as follows : — 



Head punctate ; elytra with a terminal black area which is produced anteriorly 

 along the suture, the short vestiture intermixed with longer and coarser 

 hairs 1. qiiercicola 



Head subimpunctate ; elytra without a terminal dark spot, the vestiture very 

 fine, short and decumbent, the intermixed longer hairs sparse, short and 

 indistinct 2. suljtropicus 



No sexual characters are observable, and the sex of the indi- 

 viduals thus far taken has not been determined. The genus is 

 confined, as far as known, to the Florida peninsula. 



1. A. qiiercicola Schz.— Proc. Am. Phil. Soc, XVII, 187«, p. 371 



(Xylophilus). 



Narrow, parallel, moderately convex, rather dull, pale flavo- 

 testaeeous, the under surface and head slightly dusky ; legs and 

 antennae pale throughout, except the large terminal joint of the 



