NATURAL SCIENCES OF PHILADELPHIA. 351 



than the body, the legs are long, and the claws are furnished with a large 

 square tooth at base, extending beyond their middle. 



64. Malthodes transversus, nigro-piceus, cinereo-pubescens, thorace 

 tlavo, latitudine fere duplo breviore, undique marginato, lateribus fuscis rec- 

 tis parallelis, disco oblique biimpresso, elytris rugose punctatis, antennis pedi- 

 busque fuscis, illis articulo lmo testaceo, sequentibus sequalibus. Long. "11. 



Santa Cruz Island, Mr. Bache. 



65. Thanasimus rubriventris, niger, pubescens, capite thoraceque sub- 

 tiliter punctatis, elytris dense punctulatis, striis externis ultra medium ex- 

 tensis, internis valde abbreviatis, sutura antice, fascia angulata antica altera- 

 que latiore prope apicem dense cinereo-pubescentibus, abdomine sanguineo. 

 Long. -30. 



East of Fort Colville, Mr. Gibbs. Resembles in form and sculpture C.nu- 

 b i 1 u s King, but differs by the legs being entirely black, and by the outer 

 rows of punctures of the elytra being longer : the elytra are also more parallel 

 and less convex. 



66. Thanasimus nigriventris, niger, pubescens, capite thoraceque sub- 

 tiliter punctatis, elytris punctulatis, striis omnino obliteratis, sutura antice, 

 fascia transversa ad quadrantem, altera angusta angulata ad medium, macu- 

 laque magna apicali dense cinereo-pubescentibus. Long. -27 - 35. 



East of Fort Colville, and in Bitter Root Valley. Of the same shape as the 

 preceding, but differs by the body being entirely black. The usual rows of 

 punctures on the elytra are completely wanting ; about one- fourth from the 

 base a broad band of cinereous pubescence extends from the suture nearly to 

 the margin ; the suture from the base to the band is also clothed with cinere- 

 ous hair ; behind this band, but about the mid He, instead of before the 

 middle, as in the other species, is the usual narrow, acutely angulated band ; 

 a large apical spot of gray hair occupies the hindmost fifth of the surface, and 

 extends along the suture higher than on the margin ; its anterior outline is 

 angulated, and is transversely truncate at the middle. 



In badly preserved specimens the apical spot sometimes appears to be a 

 subapical band, from the rubbing off of the hairs near the tip. 



67. Cupes ser r at a , fusco-testacea, piceo-marmorata, squamulis cinereis 

 nigrisque variegata, fronte concava, thorace transverso, lateribus parallelis, an- 

 gulis anticis acutis divaricatis, apice ad media'n late breviter producto, con- 

 fertim punctato, canalkulato, antice postkeque transversim impresso, elytris 

 cylindricis, foveis seriatis quadratis cancellatis, lateribus versus apicem spi- 

 nulis acutis armatis serie duplici positis ; oculis parvis, antennis corpore du- 

 plo brevioribus, cinereo nicroque annulatis. Long. '43 *S2. 



East of Fort Colville, at Sinyak water depot, and at Camp Kootenay. The 

 variation in size of this remarkable species is very great. Besides the spiculte 

 on the lateral margin, and on the extreme inflexed margin of the elytra, a 

 few are visible on the seventh interstitial line near the tip. The blackish 

 markings are scattered along the interstitial line and a broad band behind 

 the middle is also seen. 



It will probably be found on dissection that the characters separating our 

 three species of Cupes will warrant them in being considered as belonging to 

 distinct genera. The external characters are very marked; thus in C. ser- 

 rata the head is not tuberculate behind, and is deeply concave between the 

 antennae, which are distant, only one-half as long as the body, and somewhat 

 serrate ; the eyes are small. The mentum appears larger and more prominent 

 than in the other two species. 



In C. c ap i t a t a the head has a very deeply impressed line between the 

 eyes, and is divided behind into four tubercles ; the antennae are about two- 

 thirds the length of the body, stout, but not serrate ; the eyes are small, 



1861.] 



