54 U. S p. R R. EXP. AND SURVEYS ZOOLOGY 47TH PARALLEL. 



transversim impresso, rostro thorace longiore, tenui punctulato ad apicem Ifevi, pone medium 

 paulo dilatato ; thorace latitudine sesqui longiore, ad medium paulo rotundato, ad apicem 

 subtubulato, grosse punctato, postice canaliculate, elytris elongatis subovalibus, convexis, striis 

 crenatis interstitiis rugosis biseriatim subtilissime punctulatis ; antennis pone rostri medium 

 insertis. Long. -08. 



San Francisco. The elytra are twice as wide as the thorax, and are almost regularly oval ; 

 more than twice as long as their greatest width. 



SiTONES Germ. 



S. vittalus, elongatus niger, dense cinereo squamosus, fronte sulcato, rostro extrorsum late 

 concavo. thorace latitudine longiore, fusco bivittato, subcanaliculato punctato, elytris striatis 

 interstitiis 2 ; 4, 6 et 8vo fuscis, reliquis cinereis uniseriatim setulosis ; oculis parum pro- 

 minulis. Long. "lY. 



San Francisco and San Diego. Of the size, shape, and sculpture of 8. seniculus, but differs 

 by the regular vitta3 of the elytra, and by the entirely black antennas ; the rostrum is concave 

 only beyond the extremity of the frontal groove. 



8. sordidus, longiusculus niger, dense sordide squamosus, fronte sulcato, rostro ad apicem 

 concavo, thorace latitudine hand longiore, punctato vix vittato ; elytris striatis interstitiis 

 alternis uniseriatim setulosis ; antennis ad basin ferrugineis ; oculis parum prominulis. 

 Long. '2. 



"With the preceding. Larger and less slender than 8. senicidus, and distinguished by the 

 rostrum being slightly narrowed at base, and flat above as far as the end of the frontal groove, 

 and then concave to the apex. In S. seniculus the rostrum is concave for nearly its entire 

 length, and is not at all narrowed at the base. The color of the scales is cinereous in S. seni- 

 culus, and dirty yellowish brown in the present species. 



Alophds Schonh. 



A. didymus, niger, ochreo fusco suhtiliter dense pubescens, rostro canaliculato, thorace dense 

 punctato, latitudine vix breviore, antice profunde constricto, lateribus antice paulo rotundatis 

 tenuiter canaliculato, vitta utrinque sublaterali pallidiore ; elytris thorace sesqui latioribus, 

 dense suhtiliter rugose punctulatis, ochreo nigroque subtesselatis, gutta utrinque ante medium 

 alteraque ad dodrantem densius pallide pubescentibus. Long. •48. 



Leo. Proc. Acad. Nat. Sciences T, 20. 



Oregon, Dr. Townsend. Smaller and narrower than A. alternatus Say, and readily distin- 

 guished by the different form of the thorax, and by the absence of elytral striaa. 



A. constrictus. On comparing a specimen from Sitkha, sent me by Baron Chaudoir, and one 

 collected by Dr. Cooper on the journey from Vancouver to Yokolt, with A. alternatus Say, 

 found at Lake Superior, I find them entirely different. The species from Oregon and Russian 

 America has the sides of the thorax subserrate and the apex strongly constricted ; the body is, 

 also, more elongate, and the thorax is much smaller. A. didymus approaches it more nearly ; 

 the thorax of that species is not at all narrowed towards the base, and the sides are not serrate. 



