210 CURCULIONID^E. 



[LeConte. 



more obtuse, less prominent, tipped with yellow pubescence; beak and an- 

 tennae ferruginous, the former sparsely punctured. Length 3 mm.; .12 

 inch. 



One (j\ Texas, Belfrage. Easily distinguished by the different color of 

 the pubescence, the more obtuse elytral callus, and the absence of the black 

 sutural spot. 



TYCHIUS Sch. 



The few species of this genus thus far known in our fauna have the funic- 

 ulus of the antenna? 7-jointed, with the exception of T. setosus, which 

 may perhaps be hereafter recognized as generically distinct; they resemble 

 in form Centrinus, though the contiguous front coxae and toothed claws will 

 enable them to be immediately distinguished. 



It is worthy of remark that the first observation concerning the anal seg- 

 ment of the tf, is recorded by Mr. Brisout de Barneville.* Had the impor- 

 tance of this observation been recognized, and its limitations inquired into, 

 much of the labor I have devoted to the study of the Rhynchophorous series 

 would have been saved, and our knowledge concerning the classification of 

 these insects would be much farther advanced-! 



Our species may be thus distinguished : 



Surface clothed with scales and pubescence only... 2. 



" bristles 6. 



2. Scales narrower, hair-like 3. 



" oval 5. 



3. Beak rather slender 4. 



" slender at tip, stout at base 1. arator. 



4. Sides of prothorax rounded 2. lineellus. 



oblique 3. sordidus. 



5. Scales small, dense, not mixed with hairs 4. tectus. 



" larger, scattered, with pubescence inter- 

 mixed , 5. semisquamosus. 



6. Of usual size, elytra oblong 6. hirtellus. 



Very small, elytra oblong-oval 7. setosus. 



1. T. arator Gyll., Sch. Cure. iii. 414; (synom. excl.) 



Two specimens, Illinois ; Mr. Walsh. Say apparently confounded this 



species with the one described by him as T. aratus; and Major Gyllenhal 



suspecting perhaps the existence of some error has, while quoting Say in 



synonymy, given a different name to the insect received from that author. 



Although of the size (3.3 mm.; .13 inch) and form as T. aratus, it is 



quite distinct by the beak narrowed from the base to the tip, less distinctly 



channeled, and more densely pubescent; the covering is of fine narrow 



prostrate hair-like scales of a uniform pale dirt color, and the hind thighs 



are distinctly toothed. T. aratus is unknown to me, unless it be T. tectus. 



*Tychius de France, Ann. Soc. Ent. Fr. 1862, 765. 



jTychius amvnus Say, belongs to Pachytychius t (p. 168); T.corniculatus Fahrseus 

 to Smicronyx, (p. 173.) 



