INSECTS — COLEOPTERA. 69 



Dendroctonus Er. 



D. valens, rufo-piceus, flavo-hirtus, 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. •34. 



One specimen, San Francisco ; Mr. Child. Much larger and broader than the next species, 

 and diifers from the large species of the Atlantic States by the finer and denser punctuation of 

 the thorax. 



D. similis, rufo-piceus, flavo-hirtus, capite 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 ; elytris cylindricis confertim granulato-punctatis, striis vagis foveatim punc- 

 tatis. Long. "25. 



Oregon, abundant ; collected by Col. McCall and Dr. Cooper. 



BosTRiCHUS Fabr. 



B. jpuhipennis, cylindricus longiusculus, nigro-piceus, thorace latitudine sesqui longiore, ante 

 medium tuberculato et exasperato parce puberulo, pone medium parce punctulato, elytris subti- 

 lissime punctulatis dense flavo-puberulis et parce setulosis, postice oblique declivibus baud 

 armatis ; capite piano marginibus longe flavo-pilosis. Long. "l. 



San Jose, California. 



CORTHYLUS Er. 



C. 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./asciatus. 



Ersates Serv. 



E. spiculatus, elongatus piceus, capite profundissime canaliculato, tuberculo suboculari valde 

 acuto, elytris rugose punctatis. Long. 2-15 — 2-55. Tab. II, fig. 9. 



Mas antennis longioribus, extrorsum attenuatis, articulis 3 — 4 punctis elevatis exasperatis, 

 thorace latitudine duplo breviore subtiliter dense scabro, vage inaequali antice biimpresso, late- 

 ribus serratis, femoribus anticis subtus tranversim rugosis. Fig. 9a. 



Femina, antennis corpore duplo brevioribus, articulis punctatis, thorace antrorsum angustato, 

 lateribus inaequaliter longe spinosis, dense fortius scabro inaequali, antice utrinque subcalloso. 



Lee. Proc. Acad. Nat. Sc. T, 218. 



Trichocnemis spiculatus Lee. Journ. Acad. Nat. Sc. 2nd ser. 2, 110. 



Oregon and California. The genus Trichocnemis was established by me upon the 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 sufiicient reason why they 

 should not be placed together, and it therefore gives me pleasure to make the necessary correction. 



