230 CATALOGUE OF THE TXSECTS OF 



5. H. EHODOBACTYLUS, Mavsll. 



Stepli. Illust., 2fand., iii., 365. 



" Twizell."— P. J. Selhij, Esq. Above Winlaton Mill, and at 

 Prestwick Car, — J. H. June — July. 



Both larva and perfect insect live between the bark and the 

 wood of decayed broom and furze; their food appears to be the 

 partially rotten wood, in which they cut out channels. 



308. Dendroctonus, Erichson. 

 1. D. PiNiPERDA, Linn. 



Hylastes piniperda, Stepli. Illust., Mand., iii., 3G3. 

 Under the bark of felled Scotch pines, and perforating and 

 eating up through the leading or side shoots of young trees; 

 generally distributed. May — August. 



300. Hylesinus, Fob. 



1. H. CRENATUS, Fah. 



Stepli. Illust, Mand., iii., 3 GO. 



In bark of partially decayed ash trees; Heaton, Dunston, Gib- 

 side, Morpeth. June — October. 



H. crenatus makes a brisk chirping noise, by rubbing the 

 abdomen against the elytra. I frequently notice them in the 

 evening", with the apex of their abdomen protruded from the 

 orifice of their holes. — T. J. B. 



2. H. Fraxini, Panz. 



Stejyh. Illust , Mand., iii., 360. 

 Under bark of felled ash trees; common. 



3. H. sericeus, Marsh. 



Stepli. Illust, Mand., iii., 361. 

 Minute, narrow, subcylindric, pale fuscous, opaque, elytra paler; 

 head piceo-fuscous, thickly and finely punctate; antenn?e rufes- 

 cent, the longish-ovate, moderately stoutish, club, slightly fuscous ; 

 thorax conic, considerably narrowed anteriorly, but moderately 

 convex, a faint elevated longitudinal line from the hinder margin, 

 till about the disk, closely and thickly covered with testaceo- 

 cinereous scales, the anterior part and disk piceo-fuscous, the 



