CUUCULIONIDES. 270 



mucronate at trp; pectus and postpectus with a longitudinal white 

 line. 



Length three-twentieths of an inch. [16] 



CurcuUo myrmex Herbst. Nutursyst. 



In appearance it has a slight resemblance to a Formica. 



\_Otidocephalus Chevr. is an older name of this genus. — Lec] 



BALANINUS Germ. 



1. B. PROBOSCIDEUS Fabr. {R//nc7i3pnus.) Rostrum as long again 

 as the body. This seems to be CurcuUo Davicsii Swederus in Trans- 

 actions of the Stockholm Society, 1787, and it is probable that 

 the latter name is prior to that of Fabr. 



2. B. NASicus. — Rostrum not so long as the body or hardly 

 longer, not thicker at base, but proceeding abruptly from the head, 

 rectilinear to the middle, piceous. 



It is remarkable by having the rostrum at base hardly thicker 

 than in the middle, in consequence of which it appears to proceed 

 abruptly from the head without any gradation. 



It is the CurcuUo nucum of jMelsh. Catal. 



3. B. RECTUS. — Rostrum rectilinear or very slightly recurved 

 to near the tip where it curves downward : antennae very slender. 



Inhabits Pennsylvania. 



This is distinguishable by the rectilinear or slightly recurved 

 rostrum. 



4. B. NASUTUS. — Body robust : scutel elongated white. 

 Inhabits Pennsylvania. 



This species difters from prohoscideus F., in being more robu.st 

 and in having the scutel longer. Schonherr has proposed the 

 name o^ rostrutus for this insect, (in litt.) 



TYLOMUS Schonh. 



T. LiNEATicoLLis Say. [^Rijnchsenus.'] Journ. Acad. Nat. Sc. 

 vol. 3, p. 313. 



Var. a. much smaller. 



Length exclusive of the rostrum less than one-fifth of an inch. 



It differs also considerably in the liueations of the thorax, and 

 the alternate elevated, interstitial lines of the elytra are less obvi- 

 ous and not so acutely edged. I have named it provisionally 

 palmicollis. 



[Belongs to Rhi/ssematus Sch. — Lec] 



