INSECTS COLEOPTERA. 
55 
LiSTRODERES Sclionh. 
L. teretrirostris, niger oblongus, cinereo-sordide squamosus, capite rostroque confertim punc- 
tatis, illo thorace paulo breviore paiilo arcuato, cylindrico, dense argenteo sqiiamoso baud 
carinato, fronte sufoveato, thorace latitudine longiore, lateribus rotundatis, confertissime punc- 
tato, parce nigi-o-punctato et pilosello ; elytris tborace latioribiis, latitudine fere duplo longiori- 
bus ad basin late emarginatis^ liumeris rotundatis, nigro-variegatis striis punctatis interstitiis 
parce uniseriatim nigro-punctatis et setulosis ; antennis piceis, articulo 3io secundo plus sesqui 
longiore. Long. '24. 
One specimen, San Francisco. Two other specimens -were found, of a much smaller size, 
(•15 — '18,) but I can find no character upon which to separate them, except that the scales 
upon the thorax appear more flat, so that no scabrous appearance results. 
L. oregonensis, niger oblongus, sordide squamosus, rostro thorace vix breviore, confertim 
punctato et rugoso, subtiliter carinato, capite confertim punctato, thorace grosse confertissime 
punctato, latitudine vix breviore, lateribus rotundatis, antrorsum angustato ad apicem trans- 
versim paulo impresso, elytris thorace latioribus ad basin truncatis, latitudine sesqui longiori- 
bus, humeris paulo rotundatis, striis punctatis, interstitiis confertim punctulatis ; antennis 
nigris, articulo 3io secundo fere duplo longiore. Long. •27; lat. elytrorum -11. 
One specimen, Shoalwater Bay, Dr. Cooper. The scales are nearly all removed by the 
spirits in Avhich it was preserved. 
Hylobius Germ. 
HJ taeniatus, elongatus, ater opacus, tenuiter flavo-pubescens, rostro 5-sulcato, ad apicem 
latiore, thorace inaequali grosse valde punctato, latitudine vix longiore, lateribus late rotun- 
datis, irregulariter late canaliculato, et antrorsum vage impresso ; elytris thorace sesqui latiori- 
bus, ad basin subtruncatis, punctis magnis quadratis striatim positis, interstitiis granulato-punc- 
tatis, quinto macula ad quadrantem, alteraque ad dodrantem flavo-pilosis, macula subhumerali 
scutelloque flavo-pilosis ; antennis elongatis, femoribus, muticis. Long. "53. 
One specimen, Vancouver, Colonel McCall. The middle groove of the rostrum commences 
in a fovea between the eyes, and extends to the apex ; the lateral grooves are in front of the 
eyes, they are broad behind^ and gradually narrowed anteriorly, vanishing a little beyond the 
middle ; the intermediate grooves are vague and anterior. The antennal grooves extend to the 
inferior part of the eyes, and are deep ; the two basal joints of the funiculus are elongate, the 
second is one-half longer than the first, and twice as long as the third. This species cannot be 
a Hylobius, but I do not know where to place it ; and while the family of Curculionidae is in 
such inextricable confusion as has been produced by the generic descriptions of Schonherr, it is 
absurd to establish any other genera, except upon the most remarkable characters. The 
characters, however, seem to be nearly those of Geonemus. 
H. torpidus, ater, capite cum rostro confertim punctato, hoc subtiliter carinato, ad apicem 
incrassato, thorace profunde canaliculato, latitudine baud longiore subrotundato, rude rugose 
punctato, interstitiis punctatis, elytris connatis ovalibus, postice perpendiculariter declivibus, 
thorace baud sesqui latioribus, dense nigro-squamosis, breviter setulosis, punctis magnis oper- 
culatis striatis, postice versus latera squamulis luteis variegatis ; femoribus muticis, tibiis 
anticis curvatis intus serratis. Long. "3 — '32. 
