Dryoccetina.l RHYNCHOPHORA. 425 



DRYOC.ETINA. 



This tribe, which is co-extensive with the Ipina of Bedel and the Tomi- 

 cina of Thomson, contains a considerable number of genera ; as in the case 

 of the preceding tribe, however, their final constitution cannot be as yet 

 said to have been settled with any certainty. Seven genera have usually 

 been regarded as British, but these have been further sub-divided in two 

 or three instances : the new genus Pityogcncs recently founded by Bedel 

 for the reception of the three species clialcajraplius, bidentatus and 

 quadridcns, formerly referred to Tomicu*, must certainly be adopted, 

 aud I have also, after some hesitation on ruy own part, been convinced 

 by Mr. Blandford that Eichhoffs genus Taphrorychusmust stand ; I still, 

 however, feel somewhat in doubt as to Lowendal's genus Lymantor 

 (containing L sepicola = D. coryli) ; the members of the tribe may 

 easily be distinguished by the head being globose, or nearly so, and 

 deeply sunk in the thorax, and by the presence of warty asperities in 

 front of the thorax in all but a very few species ; the eyes are transverse 

 and sometimes divided ; the antennae have the scape long and stout, the 

 funiculus short with the number of joints variable, and the club large 

 and compressed, and varying in shape in the different genera ; the elytra 

 are in many cases excavated behind, with the edges of the excavation 

 either simple or dentate ; the femora are stout and the tarsi slender. 



Certain of the species are extremely hurtful to forest trees, more 

 especially pines and firs : Westwood (Classification I. p. 352) relates 

 how " the great pine forests in Germany are, in certain seasons, very 

 much damaged by Tomicus typographus, which is there called the 

 * Turc,' and the injury caused by which is known under the name of the 

 ' wurmtrcekniss.' The evil is occasionally so great, that prayers are 

 offered up in the churches against its extension. In 1783, the number 

 of trees destroyed in the Hartz forest alone amounted to a million and a 

 half. 



I have preferred to adopt the name of DryocKtina for the tribe as 

 Bedel applies the name Tomicus to Hylastes which is a member of the 

 Hylesinina, and the names Bostrychus (which has been applied to 

 Tomicus) and 7/ have been for so long applied to genera not connected 

 with the group at all, that it seems likely to cause endless confusion to 

 revive them in this connexion. 



I. Funiculus of antennae with three joints ; size very 



small HYPOTHENEMUS, Westw. 



II. Fuuiculus of antennae with four or five joints; 

 size variable. 



i. Eyes entirely divided ; club of antennae without 



sutures TBYPODENDBOX, Steph. 



ii. Eyes entire or slightly einanrinate. 



1. Elytra clothed with scale-like pubescence ami 

 sometimes with fine raised hairs in addition, 

 not excavate at apex ; scutelluin very tinall ; 

 club of antennae with distinct sutures . . . CBYPHALUS, Er. 



