INSECTS COLEOPTERA. 
59 
Dendroctonus Er. 
D. valens, rufo-piceus, flavo-liirtus, capite rugose punctato, thorace latitudine breviore, 
lateribus postice fere parallelis antice convergentibus, ad apicem sinuato, ad basin late bisinuato, 
confertissime punctato, linea tenui dorsali pone medium sublaevi, antice vage transversim 
impresso, subtubulato ; elytris cylindricis confertim granulato-punctatis, striis vagis, foveatim 
punctatis. Long. 'Si. 
One specimen, San Francisco ; Mr. Child. Mucb larger and broader tlian the next species, 
and differs from the large species of the Atlantic States by the finer and denser punctuation of 
the thorax. 
D. similis, rufo-piceus, flavo-hirtus, caj^ite rugose punctato canaliculate, canali interrupto, 
thorace latitudine breviore, a basi antrorsum sensim angustato, lateribus rotundatis, ad apicem 
profundius sinuato, ad basin late bisinuato, confertissime punctato, antice vage transversim im- 
presso subtulato ; elytiis cylindricis confertim granulato-punctatis, striis vagis foveatim punc- 
tatis. Long. "25. 
Oregon, abundant ; collected by Col. McCall and Dr. Cooper. 
BosTRicHUS Fabr. 
B . pibbipennis , cylindricus longiusculus, nigro-piceus, thorace latitudine sesqui longiore, ante 
medium tuberculato et exasperato jjarce puberulo, pone medium parce punctulato, elytris subti- 
lissime punctulatis dense flavo-puberulis et parce setulosis, postice oblic[ue declivibus baud 
armatis ; capite piano marginibus louge flavo-pilosis. Long. •!. 
San Jose, California. 
CORTHTLUS Er. 
G. scutellaris, cylindricus, piceo-niger, nitidus, capite convexo scabro, thorace latitudine baud 
sesqui longiore, ante medium sensim asperato ; elytris versus basin indeterminate rufo-piceis, 
subtiliter subseriatim parce punctatis, postice declivibus, granulis tribus vel quatuor parvis 
armatis ; pedibus antennisque rufis, his clava obscuriore. Long. 'IS. 
One specimen, San Jose, California. Less elongate than O . fasciatus. 
Ergates Serv. 
E. spiculatus, elongatus piceus, capite profundissime canaliculato, tuberculo suboculari valde 
acuto, elytris rugose punctatis. Long. 2']5 — 2-55. Tab. II, fig. 9. 
Mas antennis longioribus, extrorsum attenuatis, articulis 3 — 4 punctig elevatis exasperatis, 
tborace latitudine duplo breviore subtiliter dense scabro, vage inaequali antice biimpresso, late- 
ribus serratis, femoribus anticis subtus tranversini rugosis. Fio;. 9a. 
Femina, antennis corpora duplo brevioribus, articulis punctatis, thorace antrorsum angustato, 
lateribus inaequaliter longe spinosis, dense fortius scabro inaequali, antice utrinque subcalloso. 
Lec. Proc. Acad. Nat. Sc. 7, 218. 
Trichocnemis spiculatus Lec. Journ. Acad. Nat. Sc. 2nd ser. 2, 110. 
Oregon and California. The genus Trichocnemis was established by me upon tbe female of 
this species, under the belief that the pubescence of the anterior feet differed from that of 
Ergates. But on comparing with the European species, I find no suflicient reason why they 
sbould not be placed together, and it therefore gives me pleasure to make the necessary correction. 
