848 SCOLYTID.^. 



[LeConte. 



deep straight transverse sutures, fringed at the end with very long cilise or 

 bristles in tlie (^, or even (mnli) furnislied with a long spine; eyes slightly 

 eniarginate. Prothorax much longer than wide, disc finely asperate in 

 front, alutaceous behind; anterior opening oblique. Elytra elongate, nearly 

 jerpendicularly declivous behind, and pubescent on the declivity; feebly 

 punctured in rows. Front tibiae flattened on the outer side, with two dis- 

 tinct edges, between which are transverse ridges; tarsi long and slender; 

 first joints longer; 2-3 equal, fourth small, fifth as long as second and third 

 united. Ventral segments first and second longer; third, fourth, and fifth 

 short, equal, the last broadly rounded at tip, nearly truncate. Anal seg- 

 ment present in both sexes perpendicularly declivous, small, triangular, 

 with rounded angles. 



A. Club of antennae of (J^ fringed at the tip with long 



hairs; Corthylominus Ferrari 



Posterior declivity of elytra hairy; elytra j'cllow, 



with the posterior third black 1. fasciatum. 



B. Club of antenntB of (^ with a long acute spine, and 



a few hiiirs; Cosmocokynus Ferrari. 

 Larger, piceous, elytra brownish at base, pubescent 



at tip 2. scutellare. 



Smaller, brown, prothorax testaceous behind, elytra 



not hairy at tip 3. dentigerum. 



Smaller, brown; elytra not hairy at tip, suture 



deeply impressed on posterior declivity 4. mali. 



1. M. fasciatum. Bostrichus fuse. Say, Journ. Ac. Nat. Sc. Phila. v, 

 255; ed. Lee. ii, 818; Crt/pturgun fasc. Zimm., Trans. Am. Ent. Soc. 1868, 

 143; CorthylominuH fmc. Ferrari, Tomicides, 48; Pterocyclon simile Eich- 

 hoff, Berl. Ent. Zeitschr. 1868, 277. 



r^. Club of antennie fringed with very long hairs; posterior declivity of 

 tiie elytra slightly concave near the suture, with one small tubercle towards 

 t!ie upper part; feebly margined near the tip, 



9- Club of antennae with only a few shorter marginal hairs; declivity 

 of elytra more strongly margined near the tip; the tubercle is replaced by 

 a long elevatio 1, parallel with the suture, slightly cuspidate in front. 



Lake Superior to Florida. Length 2.4 mm. ; .10 inch. The head is large, 

 flat and opaque in both sexes, but is slightlj- impressed in the 9 • 



2. M. scutellare. Corthyhis scut. Lee, Pac. R. R. Expl. and Surveys, 

 Insects, 49 i^"; Corthylomiinus scut. Ferrav'i, Tom. 49; Cryphalus eavus 

 Lee, Trans. Am. Ent. Soc. 1868, 153, (9). 



(^. Club of antennae with a few long hairs at the tip; armed with a long 

 porrect spine on the outer margin; declivity of the elytra flat, margined 

 near the tip, with three small denticles each side near the suture, and along 

 the upper part; also two others on the face of the declivity, which is slightly 

 hairy. Head flat, fringed with hairs. 



9. Club of autenn.B ov.ilrouniled without a;)ic;il spina; declivity of ely- 



