INSECTS COLEOPTERA. 65 



but of the pair at the middle, the outer one is larger, near the margin, and 2'laced in advance 

 of the inner one. 



L. crassipes, elongata^ nigra, capite thoracei^ue longius flavo-pilosis, hoc latitudine longiore, 

 convexo, antrorsum, parum angustato, utrinqiie constricto, lateribus medio valde rotundatis ; 

 elytris fortius jjunctatis, breviter pubescentibus, intra humeros longius impressis, luteis mar- 

 gine tenui, macula subhumerali altera a4 medium trienteque postica nigris, macula flava 

 rotundata ante apicem signatis, postice siihangustatis ad apicem oblique truncatis ; pedibus 

 crassiusculis testaceis, antennis validis nigris. Long. "44. 



Steilacoom, Mr. Gibbs. The black spots of the elytra are all connected by a narrow black 

 margin. The elytra are shaped as in L. octonotata Say, hut the thorax is deeply constricted 

 at each end ; this species, with the next, and Frankenhaeuseri and macilenta, form a group not 

 represented in the Atlantic States, somewhat approaching Centrodera Lee. in form. 



L. fuscicoUis, elongata testacea, capite thoraceque nigro-fuscis, breviter jjubescentibus, 

 densissime punctatis, hoc latitudine longiore, antrorsum angustato, utrinque profunde con- 

 stricto, lateribus medio obtuse tuberculatis, subtiliter canaliculate, elytris fortius punctatis, 

 glabris, testaceis a humeros subangustatis, intra humeros impressis, ad apicem vix truncatis ; 

 antennis elongatis fuscis. Long. "48. 



One specimen, San Francisco ; Mr. Child. 



Plectrura Mann. 



P. producta, nigro-picea, parce griseo-bupescens, guttulis flavo-piibescentibus parce adspersa, 

 confertim rugose punctata, thorace callo dorsali parvo, elytris callis nitidis seriebus quinque 

 digestis, ad apicem non crenulatis, singulatim longe acuminatis. Long. -5. Tab. II, fig. 15. 



Lee. Proc. Acad. Nat. Sc. 7, 19. 



One specimen, collected by Dr. Cooper at Fort Vancouver. Diil'ers from the description of 

 P. spinicauda by the tips of the elytra being not crenulated, as well as by the different arrange- 

 ment of the tubercles of the elytra. They form five series, of which only the outer one is entire ; 

 the others contain only three or four tubercles ; the sutural one is indistinct, the second ends 

 just behind the middle, the third and fourth commence about one-third from the base, and end 

 at one-fifth from the apex ; the scutellum and a little thoracic line anterior to it are densely 

 clothed with yellow hair. 



Tetraopes Dalman. 



T. oregonensis, niger, capite thorace elytrisque coccineis (pallide pubescens ?) thorace punctis 

 4 nigris, disco subito elevato, antice posticeque valde constricto, lateribus subito valde dilatatis, 

 parcius punctato, elytris parce punctatis, puncto humerali duobns ante medium, altero utrinque 

 pone medium, scutelloque nigris ; pedibus antennarumque articulo prime coccineis, tarsis, 

 genubus, tibiisque posticis nigris. Long. "55. 



Lee. Proc. Acad. Nat. Sc. 7, 19. 



Wenass river to Fort Colville; Dr. Cooper. This species has the form of T. femoratus Lee, 



but the thorax is still more dilated on the sides. From T. basalts, in which the basal joint of 



the antennae is also red, it is easily distinguished by the sudden elevation of the middle of the 



thorax. The pubescence has been removed by the alcohol in which the specimens were pre- 



9 Q 



