132 RHYNCHOPHORA. 
Well-marked sexual characters are usually present in the front of the males, of 
which sex I have examined the genitalia in Bothrosternus sculpturatus and Pagiocerus 
rimosus. The edeagus and its accessory parts are of complex type, and their exact 
structure can hardly be made clear without dissection of numerous specimens. 
The Bothrosterni are confined to the Southern United States and Tropical America ; 
their known genera are four in number. 
Prothorax with a defined side-margin. 
Sutures of the club transverse ; prothorax shining and punctured . . . . . Bothrosternus. 
Sutures of the club curved ; prothorax closely strigose. . . . . . . . Eupagiocerus. 
Prothorax with no defined side-margin, but usually with a fold above the femoral 
impression. 
Sutures of the club curved ; rostrum narrower than the front; body oval . . Pagiocerus. 
Sutures of the club straight ; rostrum scarcely narrower than the front; body 
oblong . 2. ee ee ee ee we ee ee Cnesinus. 
BOTHROSTERNUS. 
Bothrosternus, Eichhoff, Berl. ent. Zeitschr. 1868, p. 150; Chapuis, Syn. Scol. p. 24 (Mém. 
Soc. Liége, 1873, p. 232). 
Head not strongly narrowed towards the mouth; eyes narrow, remote ; antennal ridges not very prominent. 
Funiculus not strongly increasing in width towards apex; club acuminate-oval with straight sutures. 
Prothorax and elytra nearly glabrous, the former shining, punctured, with a carinate side-margin from 
base to middle; elytral striz sinuate and the interstices carinate or subcarinate towards apex, the third 
more strongly elevated. Apical processes of middle and hind tibie short, bifid; the spines on the upper 
border indistinct. 
Five species have been described, of which one, B. hubbardi, Schwarz, is North 
American. No examples of this insect nor of B. truncatus, Kichh., have been 
procurable for examination, and it is not certain whether the former belongs to the 
genus at all. 
1. Bothrosternus sculpturatus, sp.n. (Tab. VI. figg. 3; 3a, antenna; 36, 
mentum and ligula; 3, fore leg.) 
Oblongo-ovalis, nitidus, glaber, ater, antennis tarsisque rufescentibus ; elytris striatis, striis ad basin modo 
distincte punctatis, punctis rugulis transversis separatis, interstitiis ad basin rugose punctatis, dein 
nitidis, carinatis. 
Mas. Fronte nitidissima, levi; rostro lateraliter impresso et plaga villosa, rufa ornato, 
Fem. Fronte parce punctata; rostro ad basin fortiter impresso. 
Long. 4 millim. 
Oblong-oval, deep black, shining, glabrous. Head punctured; front (¢) with a circular impunctate, polished, 
interocular area; rostrum carinate at apex, impressed on either side and clothed with dense fulvous 
pubescence: front (@) less shining, sparsely punctured ; rostrum carinate at apex, deeply impressed at 
base and thinly pubescent. Prothorax transverse, constricted towards apex, sparsely punctured towards 
the middle, more strongly and closely towards the sides, the median line impunctate. LElytra a little 
wider at base than the prothorax and less than twice as long, their basal margins rounded and finely 
crenate, sides subsinuate, apex rounded ; surface striate, the strie rather wide, indistinctly punctured, 
