IieConte.] 



EKIRIIININI. 165 



rounded, suddenly narrowed near the tip, and strongly constricted. Elytra 

 very little wider than the prothorax; striaj composed of close -set punctures, 

 disc convex, obliquely impressed near the base, interspaces flat, finely 

 punctulate. Thighs rather slender, armed with a small acute tooth. 

 Length 4.5 mm; .175 inch. 

 Lake Superior and Iowa. 



3. D. rufulus. Erirhirvus rtif. Mann., Bull. Mosc. 1853, ii, 240. 

 Alaska: one specimen kindly sent by Baron Chaudoir. Smaller than the 



preceding, and very closely allied to it, diftering chiefly by the sides of the 

 prothorax less rounded, less suddenly narrowed and less deeply constricted 

 at tip, and by the elytra one-third wider than the prothorax. The color 

 is ferruginous, though this may not be of specific value. The beak is 

 scarcely as long and slender, but the legs are similar. Mannerheim erro- 

 neously states that the thighs are unarmed. 



4. D. brevicollis, n. sp. 



Pitchy black, irregularly mottled with cinereous hair, antenna? and legs 

 brown. Beak as long as the head and prothorax, strongly striate and 

 coarsely punctured. Prothorax one-half wider than long, densely punc- 

 tured, sides rounded, tip constricted ; elytra one-third wider than the 

 prothorax, convex ; strise closely punctured, interspaces sparsely punctu- 

 late. Thighs stout, with a rather large tooth. Length 3.5-4.3 mm; 

 .14-. 17 inch. 



Western and Middle States and Lake Superior. Diflfers from the follow- 

 ing species chiefly by the more transverse prothorax. 



5. D. luridus. Erirhinus lur. Mann., Bull, Mos. 1853, ii, 241. 



Alaska and California. I have a specimen in bad condition, from Geor- 

 gia, which may possibly belong to this species, if not, it will indicate a 

 new one closely allied. In well pi'eserved specimens the pubescence is 

 very coarse and mottled in color. The posterior callus of the elytra is 

 somewhat distinct, but by no means suflSciently so to warrant Manner - 

 heim's expression, "elytris ante apicem utrinque tuberculo instructis." 



Two smaller specimens from Alaska have the thorax less rounded on the 

 sides near the tip, and in one of them there is a distinct smooth, narrow, 

 dorsal vitta; they were sent to me as Erirhinus vestitus Mann., a very dif- 

 ferent species, which has the beak punctured but not striate. 



Four specimens of small size were collected by Mr. Crotch in the 

 Mojave Desert, Cal., which I would temporarily refer to this species. 

 They are yellow brown with abroad darker stripe on each elytron. They 

 agree in form with the Eastern specimen, and are a little more robust than 

 those from Alaska. Length 2.5 mm; .10 inch. 



A larger series of well-preserved specimens will perhaps show the pro- 

 priety of receiving these three forms as distinct species. 



6. D. subsignatus. Erirhinus subs. Mann., Bull. Mosc. 1853, ii, 241. 

 Alaska, Count Mnizech and Prof. Maklin. 



i 



