CURCULIONIDES. 289 



suboval before the middle, and the lateral ones have an obvious 

 branch extending to the posterior angles; elytra almost truncate 

 behind; striae numerous; interstitial lines slightly punctured, the 

 alternate ones more obvious; two or three striae between the in- 

 terstitial lines. 



Length half an inch. 



Much like R.pcrtinax, but the broader thoracic vittae, the 

 more numerous striae, unequal interstitial lines and almost trun- 

 cated elytra distinguish it. 



5. R. ClCATRicosus. — Thorax with three vittae ; elytra with 

 an elevated line and obsolete dilated indentations. 



Inhabits Louisiana. 



Body black, partially covered with a cinereous crust or pelli- 

 cle ; rostrum arquated, compressed, with a slight groove at base 

 above ; thorax with three elevated, dilated, irregular impunc- 

 tured vittae, the lateral ones have an obvious branch extend- 

 ing to the posterior angles : elytra with numerous striae a more 

 obvious, elevated, subsutural, impunctured, interstitial line ; nu- 

 merous dilated, obsolete dots or slight undulations. 



Length nearly nine-twentieths of an inch. 



Resembles the preceding as respects the number of striae of 

 the elytra, but their surface is rendered a little irregular by in- 

 dented dots or undulations which are obsolete ; the thoracic vittae 

 are a little truncated at tip. 



6. R. venatus. — Thorax trilineate, and with discoidal punc- 

 tures; elytra with capillary striae ; surface a little inequal. 



Inhabits United States. 



Body black opake, more or less, and particularly the thorax, 

 covered with a dull cinereous deposite ; rostrum with discoidal 

 punctures at base; compressed, a little arquated ; a dilated im- 

 pressed line at base above ; thorax with discoidal, equal punc- 

 tures ; trilineate, the intermediate line slender, the lateral ones 

 undulated, a little broader, punctured: elytra with distinct, acute 

 striae, punctures large but not profound, obsolete, excepting each 

 side and at base; interstitial lines alternately and very slightly 

 more prominent; surface slightly inequal. 



Length over three-tenths of an inch. 



Smaller than the preceding species, and the thoracic elevated 

 lines are much more slender. 



19 



