408 G. R. CROTCH, M. A. 



I>. anxillS, Mannh. Bull. Mnsc. — Closely allied to J), confjiie.ns. hut regu- 

 larly ovate, and the elytra are brown with striae of closely approximated black 

 dots (not impressed); the underside is entirely pale. L. 135 inch. 



Oregon, Russian America. $ , elytra smooth. 



This species has the elytra colored as in D. lapponicus, but the 

 coxal plates are similar to those of D. rimtmrinctus. 



I>. marginicollis, Lee. Proe. Bost. i., 201.— Regularly ovate, rich fulvous 

 yellow; thorax short, black, sides broadly margined with orange, the bnsal 

 margin markedly broader in the middle: sen tell um fulvous; elytra fulvous, 

 thickly irrorated with brown; underside with the apex of the rnetasternum 

 and the ventral segments broadly shaded with black; coxal plates obtusely 

 pointed. L. 1 25 inch. 



California, Kansas. 9 elytra smooth. 



The CDxal plates are somewhat similar to those of D. mnrginmh. 

 In some specimens the elytra are entirely black, with a yellow margin. 



I>. Cordieri, Aube". Spec, vi., p. lb 1 -. mbfimbatux, Lee. Pae. R. R . p. 34.— 

 Elongate ovate, fulvous, head, thorax and elytra brown, margined w th yel- 

 low; the thorax more narrowly margined, especially at the base; underside 

 uniformly yellow. L. 1-15— 1-20. 



9 elytra sulcate, the sulci abruptly terminated a little beyond the middle, 

 or smooth. 



Oregon, Kansas, Vancouver Island, Minnesota, Ohio River. Coxal 

 plates rounded as in D. dimidiafm. 



D. verticalis, Say, Am. Trans, ii., 92.— Fulvous below spotted with black, 

 above brown margined with yellow; the thorax is only margined on the sides; 

 the elytra are ovate with the dorsal row of punctures well marked; the sub- 

 apical fascia oblique and rather obsolete. L. 130— 135 inch. 



Pennsylvania, Lake Superior. 



Closely allied to D. dimidiatus, but more convex, less narrowed in 

 front, and the coxal plates more decidedly rounded. 



D. fasciventris, Say, Long's Exp. ii.. 270. — Closely allied to D. verticalis 



but much smaller, metasternum ami ventral segments broadly bordered with 

 black; females often sulcate the sulci reaching beyond the middle, external 

 ones not co .fluent. L. 1-25 inch. 



Pennsylvania, Lake Superior. Allied to D. punctulatus but not 

 black beneath. 



D. hybrid us. Auhe*. Spec. p. llfl. — Regularly ovate, elytra finely alutaee- 

 ous; thorax with the sides alone yellow, much shorter than in the preceding 

 species, and with the sides regular, and not flattened out; elytral pale margin 

 equally broad to the apex, underside fulvous, coxal plates rounded. L. 1*8 

 inch. 



Pennsylvania, Kansas, Illinois. 



