AMERICAN COLEOPTERA. 103 



1 have seen but one specimen from Alaska, collected at St. 

 Michaels. 



N. Rathvoni, Lee. Trans. Am. Phil. Soc. x, 400. 



With this species begins a small series in which the sides of the 

 elytra cease to be sub-parallel and become rounded, and the form is 

 therefore oval. The thorax is similar in form to Sahlhergi\ the hind 

 angles being very distinctly rectangular. The elytral stria3 are not 

 deep, and finely but not closely punctured, the interstices are flat, the 

 third with three, the seventh with five larger punctures. Body en- 

 tirely black. Length .48 inch; 12 mm, 



A single specimen from Sacramento, California, is known in collec- 

 tions. 



N. Mannerheimii, Fisch. Ent. Russ. iii, 253, pi. 14, fig, 5 ; Esch. Zool. Atlas, 

 183.3, p. 23. 



Closely allied to the preceding, and diifering only in having the 

 hind angles of the thorax less distinctly rectangular, and in a different 

 arrangement of the larger punctures of the elytra. The elytra arc 

 also more broadly rounded and are faintly striate, the stria; however 

 varying in depth and distinctness of punctation in difi'erent specimens. 

 The third stria has five very distinct large punctures. The intervals 

 are flat. Body entirely black, antenna6, palpi and tarsi castaueous. 

 Occurs in Alaska and Vancouver Island. 



N. Eschscholtzii, Men. Bull. Acad. Petrop. ii, 1844, p. 55; cantanipesXht^c. 

 List. Col. X. A. p. 2. 



The description of Mcnetries applies so distinctly to that marked 

 castanipes in our cabinet that I cannot do better than translate the 

 original. 



"Black; elytra elongate oval, striate, strite obsolctely punctured, and with 

 three impressed punctures ; a/ntennce and legs pale rufous. 



" It has very nearly the size of X. Manner heiviii, but the el^'tra have a more 

 oval form, being however a little less broad at the base; it is black, with an- 

 tennae and legs clear red, the palpi are rufous, also the mandibles which arc 

 brownish at the tip ; on the upper surface of the head near each eye a small ob- 

 long rufous spot. The thorax is rather broader at its middle than the above 

 cited species, and slightly more convex. The elytra are striate, the strise faint 

 and slightly punctuate, the intervals are more flat, and on the third stria may 

 be seen three moderately large impressed punctures. From California. Length 

 .40_.46 inch; 10—11,5 mm. 



To the above description might be added, "hind angles of the thorax 

 distinctly rectangular," and nothing further is necessary to render evi- 

 dent what Menetries had in view when the description was being 

 written. 



Three specimens are before me ; one in Dr. Leconte's cabinet is a 



