CURCULIONIDES. 295 



Inhabits Pennsylvania. 

 Curculio nigrinus Melsli. Catal. 

 Length one-tenth of an inch. 



2. B. INTERSTITIALIS nob. (Rhj ncJuxnus) Jour. Acad. Nat 

 8c. vol. 3, p. 314. 



3. B. sgolopax. — Body dark chestnut : rostrum longer than 

 the head and thorax, slightly curved, linear : thorax conic, with 

 small, numerous punctures: elytra deeply impressed, [27] not 

 obviously punctured, a little shorter than the abdomen. 



Inhabits Missouri. 



Length over one-tenth of an inch. 



4. B. ACUTIPENNIS. — Body brassy, highly polished, punc- 

 tured : rostrum as long as the head and thorax, arquated, linear : 

 thorax, punctures profound but not close set ; base undulated ; 

 elytra with acute, deeply impressed, impunctured striae, which, 

 on the posterior declivity are dilated so as to make the intersti- 

 tial lines acute, and elevated ; tip of the elytra on the middle 

 with an elevated, acute tooth. 



Inhabits Mexico. 



Length one-tenth of an inch. 



CRYPTORHYNCIIUS Illig. 



1. C. retentus. — Body covered by very short, dense, pros- 

 trate hair ; rostrum longer than the head and thorax ; a little 

 arquated, punctured and on the sides lineated : thorax with two 

 whitish undulated vittse : scutel orbicular : elytra with four 

 elevated, acute, interrupted lines, between which are double 

 series of impressed punctures : elevated lines obsolete on the 

 depressed tip : thighs emarginate towards the tip and bidentate. 



Inhabits Mississippi. 

 Length less than three-tenths of an inch. 

 It seems to be related to C. obtentus Herbst ? 

 [Belongs to Conotrachelus Sch. — Lec] 



2. C LINEATICOLLIS nob. (Rj/ncJisenusyjoum. Acad. Nat. Sc. 

 vol. 3, p. 313.— As this has evidently the pectoral groove it can- 

 not belong to the genus Tylomus, the anterior feet also are dis- 

 tant. 



3. C. palmacollis. — Thorax with numerous small grooves. 



