21G CURCULIONID^. 



[LeConte. 



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

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

 inch. 



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

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

 sutural spot. 



TYOHIUS Sch. 



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

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

 may perhaps be hereafter recognized as generically distinct; thej'^ 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 (^, 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.f 



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. Saj^ apparently confounded this 

 species with the one described by him as 2\ ar alios; 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. 



iTychius amcenus Say, belongs to Pachytychius, (p. 168); T. corniculatus Fahrseus 

 to Htnicronyx, (p. 173.) 



