788 ColeopteroJorjical Notices, VI. 



ARIOTrS n. gen. 



The body iu tliis genus is nariow, elongate and subparallel, the 

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

 tinct, the base transversely truncate and broadly arched, the eyes 

 moderately large, rounded, subglobular, very coarsely faceted, 

 scarcely at all setose and with only the slightest evidence of a 

 minute emargination, the tempora very 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, transverse!}' subsecuriform, with the apex obliquely- beveled 

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

 ceding genera. The antennje are rather short, slender, incrassate 

 toward apex. The prothorax is transversel}^ and feebly obtrape- 

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

 and the elytra parallel and devoid of distinct impressions. The 

 middle coxae are narrowly separated, the posterior only slightly 

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

 tibiae devoid of terminal spurs but with a porrect terminal plate 

 internally, apparently composed of agglutinated setaj ; tarsi 

 slightly shorter than the tibiae. 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 : — 



Hc<ad punctate; elytra with a terminal black area which is produced anteriorly 

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

 hairs 1- qiiercicola 



Head subimpuuctate; elytra without a teiminal dark spot, the vestiture very 

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

 indistinct 2. sil1)ti-opicilS 



'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. quei'Cicola Schz.— Proc. Am. Phil. 8oc., XVII, 1878, p. 371 



'(Xylophilus). 



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

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

 antennae pale throughout, except the large terminal joint of the 



