148 CURCULIONID^. 



[LeConte. 



tliickened and elevated, the base just behind the margin is impressed. The 

 scutellum is quite evident, and rather narrow. The base of the prothorax 

 is obliquely emarginate each side, and the middle lobe longer than usual, 

 with the angle rounded. 



CLEONUS Sch. 



Although the following species difler in minor details of structure, which 

 by some entomologists are regarded as of generic value, there is such a 

 general resemblance in appearance and in the more important characters, 

 that it seems more natural to regard them as constituting one genus. I am 

 the more confirmed in this belief from the impossibility of placing them 

 with any satisfaction in the groups established on the species of the other 

 continent, themselves very indefinite in extent. 



I would therefore include under this head all the species in our fauna in 

 which the beak is stouter than in Lixus, but not dilated at tip ; the gular 

 peduncle is not so broad and short as in the preceding genera, but is shorter 

 than in Lixus; there is a difference between the species in this character, 

 it being longer in proportion to the increasing slenderness of the beak. 

 The front and middle tarsi are broad, the third joint at least spongy and 

 bilobed ; the hind tarsi are hairy beneath in the first division, but broad 

 and spongy in the second. The general tendency of the pubescence is to 

 form longitudinal stripes, and not transverse or oblique bands. The body 

 is elongated, resembling Lixus. 



Our species may be thus tabulated : 



A. Hind tarsi with third joint incompletely spongy beneath, deeph' 

 emarginate, feebly bilobed. Apleurus Chevr. 



Prothorax gradually narrowed towards the tip... 2. 



" suddenly narrowed towards tlie tip ; 

 sides sub-sinuate 1. collaris. 



2. Beak moderately strongly carinate ; front not 



impressed 3. 



Beak less strongly carinate ; front transversely 



impressed 4. 



3. Beak feebly carinate; front not impressed; elytra 



with broad black gutural and discoidal vittte, 



speckled with white 2. trivittatus. 



Elytra uniformly clothed with yellowish pubes- 

 cence 3. inornatus. 



4. Elytral vittaB irregular 4. frontalis. 



" " narrow, regular 5. virgatus. 



5. Elytra pubescent with the first, second, sixth 



and seventh interspaces darker 6. quadrilineatus. 



,B. Hind tarsi with third joint spongy, broad, deeply bilobed. 



Prothorax carinate before the middle 3. 



" not carinate before the middle 2. 



