104 MANDIBULATA. — COLEOPTERA. 



it several times at Hertford in the month of June. " Near Cam- 

 bridge." — C. Darwin, Esq. 



Genus CLXII. — Sylvanus, Latreille. 



Antennae as long as the thorax, rather stout, eleven-jointed, the basal joint 

 large, clavate, the two next smaller, obconic, the five following very short, 

 subturbinate; the ninth and tenth stout, truncate, perfoliate; the eleveuth 

 equally stout, rounded. Palpi very short, unequal, subfihform ; the terminal 

 joint larger and subcylindric : head prominent and narrowed anteriorly : eyes 

 slightly prominent : thorax elongate, its sides more or less dentate, somewhat 

 remote from the elytra, which are rounded at the apex : body elongate, narrow, 

 sublinear, depressed: legs short ; femora stout; tarsi four-jointed. 



Sylvanus has the club of the antennae Particulate, and by that 

 character, united to the equal length of the second and third joints 

 of the antennas, filiform palpi, and elongate more or less crenate 

 or denticulate thorax, it may be distinguished from the other genera 

 of this group. 



A. With tbe sides of the thorax considerably denticulate. 



Sp. 1. Surinamensis. Fusco-testaceus, pubescens, thorace sulcato, utrinque sex 

 dentato, elytris punctato-striatis, interstitiis alternis elevatioribus. (Long, 

 corp. 1| lin.) 



De. Surinamensis. Linne. — Sy. Surinamensis. Steph. Catal. 92. No. 983. 

 note. 



Fusco- testaceous, pubescent, the thorax with three longitudinal elevated lines, 

 the lateral margins with six stout denticulations : elytra punctate-striate, the 

 alternate interstices elevated : legs testaceous. 



Found not uncommonly in brown sugar, whence I infer that it is merely an im- 

 ported species; its native country, according to the Linnean name, beino- 

 Surinam. 



Sp. 2. dentatus. Rujescens, elytris lineis elevatis tribus obsoletis, thorace punctis 



duobus impressis, lateribus dentatis. (Long. corp. 2 lin.) 

 Cor. dentata. Mar sham. — Sy. dentatus. Steph. Catal. 92. No. 984. note. 



Obscure reddish : antenna, head, and thorax, dusky ; elytra brighter, with three 

 elevated obsolete strife, between which are other slender ones : thorax with 

 the lateral margins crenate-dentate, and two impressed fovese near the base : 

 posterior femora with a strong tooth. 



Taken in similar situations with the last; consequently a doubtful native. 



