TRIBE VIII. TYCHI1XI. 239 



c. Fourth ventral suture indistinct; beak very slender, not carinate; 

 pubescence coarse. II- THYSANOCNEMIS. 



cc. Fourth ventral suture distinct; beak carinate. 



d. Thorax not constricted near apex; beak stout; elytra dark 

 brown, with a single pale cross-band behind middle. 



III. PLOCETES. 



eld. Thorax distinctly constricted behind apex; beak slender; elytra 

 with a black cross-band at middle, bordered both before and 

 behind with an irregular band of yellowish-white scales. 



IV. CHIONANTHOBIUS. 

 aa. Angles of second ventral segment extending to the fourth. 



e. Elytra with tubercles of tufted hairs. V. TYLOPTERUS. 



ee. Elytra not tuberculate. 



f. Tips of elytra conjointly rounded, covering the pygidium. 



VI. TYCHIUS. 

 ff. Tips of elytra separately rounded; claws simple. 



VII. PARAGOGES. 



I. PROCTOBUS Lee., 1876. (Gr., "anus.") 



Small oblong species resembling Dorytomns in general ap- 

 pearance and having the beak as long or longer than thorax, cyl- 

 indrical, curved, punctured; antenna? inserted at its apical third, 

 scape slender, reaching the eyes, funicle 7-jointed, the first joint 

 as long as the next two, 2 7 nearly equal, short, gradually 

 wider; eyes rounded, widely separated; ventral segments un- 

 equal, third and fourth together not longer than second. Encalus 

 Lee. is now included with Proctorus. 



KEY TO SPECIES OF PROCTORUS. 



a. Femora not toothed; beak as long as thorax, rather stout, densely 

 punctured, not striate. 346. ARMATUS. 



o. Femora minutely toothed; beak longer than thorax, much more slen- 

 der, striate and punctured on basal half. 347. DECIPIENS. 



346 (8687). PROCTORUS ARMATUS Lee., 1876, 212. 



Elongate-oblong. Black or piceous, thinly clothed with white and 

 dull yellow hairs, the former condensed to form a short humeral stripe 

 and some small scattered spots on elytra; antennae, tibite and tarsi 

 reddish-brown. Thorax as wide as long, sides broadly rounded, feebly im- 

 pressed near tip, disc rather finely and densely punctured. Elytra 

 elongate-oblong, one-third wider at base than middle of thorax, humeri 

 prominent, rounded, sides parallel to apical fourth; strife with large, deep 

 close-set punctures; intervals flat, sparsely and finely punctate. Length 

 3.4 3.8 mm. 



Marquette, Mich., June 28. South side of Lake Superior. Of 

 the male LeConte says : The fifth ventral is as long as the three 

 preceding united and is divided by a transverse elevated ridge 

 into two parts, the front one being the larger and broadly con- 



