104 RHYNCHOPHORA — SCOLYTIDAE. 



yellow scales and also with an angular band of white scales 

 reaching from shoulder of each elytron to middle of suture 

 and usually enclosing a dark spot at junction; antennae 

 red-brown ; legs reddish-yellow-brown. T.. 1 — 1 1. Eatlier 

 common, H. vittat'its,Yah. 



Cissophagus, 



Lighter or darker brown ; elytra lighter ; legs yellow- 

 brown; upper-side closely-covered with small, yellowish 

 scale-like hairs. Thorax rather longer than broad, some- 

 what constricted in front, l)roadest in middle, with a slightly 

 raised central line; elytra somewhat dilated behind middle, 

 with deep punctured striae, tlie punctures large, quad- 

 rangular, interstices granulate, with small, stiff bristle 

 hairs. L. 1 1. Not common. G. hederae, Schmidt. 



Carphohoriis, 



Under-side and head black ; elytra, antennae and legs 

 yellow-brown ; thorax rather darker. ]\Iure elongate than 

 C. hederae; thorax longer and narrower, scale-like pubes- 

 cence forming a distinct dorsal ridge, broadest in middle, 

 very little constricted in front; elytra less abruptly rounded 

 behind, punctures of striae less clearly defined, bristles on 

 interstices less stout and long ; anterior tibiae more tri- 

 angularly dilated, with only two or three teeth at apex. 

 L. 1 1. Eare. G. pilosus, Katz. 



Hylurgus. 



A* Second interstice on elytra without tubercles on apical 

 declivity. 



Usually black; elytra brown ; antennae and tarsi rust- 

 red ; often entirely brown or yellow-brown. Head with 

 strong scattered punctures, with a raised central line on 

 front part of forehead ; thorax moderately narrowed in 

 front, with scattered punctures, central line smooth ; elytra 

 rather broader than thorax, double as long as togetlier 

 broad, with very fine punctured striae, interstices somewhat 

 wrinkled and each with a row of little tubercles, except on 

 second on apical declivity. L. If — 2 1. Common. 



H. piniperda, Lin. 



J5. Second interstice on elytra with tubercles on apical 

 declivity. 



