642 FAMILY IV. SCOLYTIDJE. 



Peekskill and Ithaca, N. Y. ; Jan. 23 May 1. Philadelphia Co., 

 Pa., April 25, on beech. (Wenzel.) Eastern United States and 

 Ontario, Canada, south to Florida. Food plants, many trees, both 

 deciduous and coniferous. The spine referred to by LeConte & 

 Horn is probably long- hairs on club, adhering together. Male 

 and female are reversed by LeConte. 



II. CORTHYLUS Erichson, 183G. (/'Name of a bird.") 

 Rather stout cylindrical species in which the funicle of the 

 antennre is reduced to a single joint; club much larger than in 

 MonartJinnii, not fringed; upper surface of body strongly punc- 

 tured ; front tibia? flattened and margined on the outer face, but 

 with no transverse ridges as in Monarthrum. 



KEY TO EASTERN SPECIES OF CORTHYLUS. 



a. Elytra rounded behind without furrows or tubercles. 



1035. PUNCTATISSIMUS. 



aa. Elytral declivity with small tubercles. 



6. Male antennal club without spine. 1036. COLUMBIANUS. 



fob. Male antennal club with three sutures, the two outer armed with 



a long curved spine. 1037. SPINIFEB. 



1035 (9054). CORTHYLUS PUNCTATISSIMUS Zimrn., 1868, 144. 



Rather stout, cylindrical. Dark brown or black, antennae and legs 

 ferruginous. Prothorax longer than wide, extending hood-like over the 

 head, roughly tuberculate in front, shining behind, with fine, sparse punc- 

 tures. Antennal club articulated or annulated on both sides. Elytra 

 strongly punctured but not in rows, rounded behind without furrows or 

 teeth. Front tibia? flattened and margined on outer face, without trans- 

 verse ridges. Female, head flattened, opaque, slightly broadly concave at 

 middle. Male, head slightly convex, shining, punctured. Length 4 mm. 



Lawrence and Posey counties, Ind., rare; June 3 July 14. 

 Cape May C. H., N. J., Oct. 22, on roots of huckleberry. (Wensel.) 

 Occurs in the Eastern, Middle, Southern and Western States. 

 Food plants, Acer., Sassafras., Cornus, Carpinus, Corylus, Ostrya, 

 Gaylussacia. Felt states that the larva lives on ambrosia, a fun- 

 gus grown in the galleries of huckleberry roots, where it was de- 

 scribed as living by Schwarz.* He says it has a preference for 

 shaded localities Where plants grow on a decayed log, or where the 

 soil is thickly covered with leaves, and believes that it is largely 

 subterranean in habit. The infested huckleberries may be detected 

 by wilted leaves, and the infested part of the root by sawdust ad- 

 hering to it. This species has been recently destructive to culti- 

 vated Rhododendrons and Azaleas in New Jersey. (Weiss, Journ. 

 N. Y. Ent. Soc., 1916.) 



*Proc. Ent. Soc. Wash., II, 109. 



