HyJesim'na.] RHYXCEOPHORA. 411 



ventral surface of the abdomen and the fact that the thorax is not 

 bordered at sides ; the projecting head and the sculpture of the thorax 

 will distinguish it from the Dryocaetina ; through Hylastes it presents 

 affinities towards the Cossonidse (the antennae being much the same in 

 form), and through several of the other genera towards the Platyrrhinidae 

 (Choragus, &c.) ; the shape of the club of the antennae and the number 

 of joints to the funieulus of the antennae afford good characters for the 

 distinction of the genera, which cannot, however, be considered as quite " 

 settled ; all the European genera, as at present constituted, appear to be 

 represented in Britain with five exceptions (Hylurgu*, containing only 

 the two species H. ligniperda and H. MicTditzi, Carphoborus, containing 

 only C. minimus and C.pini, Dendroetonus, Phlaeo$inus and Phlceotribu*); 

 their names are very much confused by different authors. 



I. Eyes not divided ; third tarsal joint nearly always 



dilated and bilobed. 

 i. Faniculas of antennae with seven joints. 



1. Club of antennae globose or ovate. 



A. Anterior coxae contiguous ; first joint of the 

 clnb of the antennas very large, shining, the 



following very short HlXASTES, Er. 



B. Anterior coxa; -widely distant ; first and 

 second joints of the club of the antennae large, 



almost equal, the following very short . . . HrLASTTSUS. Bedel. 



2. Club of antennae compressed, oblong .... HTXESINPS, F. 

 ii. Funieulus of antennae with six joints. 



1. Anterior coxae narrowly separate ; thorax with 



long villose hairs at sides; length -i-o mm. . . MfELOPHTLrs, Eicfi. 



(Hylurgus pars, Brit. Cat.). 



2. Anterior coxae rather widely separate; thorax 



evenly pubescent ; length 2J mm CissoPHAGUS, Chap. 



ill. Funicalus of antennae with five joints. 



Clnb of antennae oval, nearly globose, formed 



of four joints fitting closely together .... XTLECHISCS, Chapuis. 



(Carpholiorut, Brit. Cat.)- 

 Club of antennae formed of three loose detached 



joints PHXCEOPHTHORUS, Wall. 



II. Eyes completely divided ; third tarsal joint 

 entire not broader than the preceding ; antennae 

 with a solid ovate club, and with the funieulus 

 five-jointed POLTGRAPHTS, Fr. 



HYLASTES, Er. (Tomicuf, Latr., teste Bedel). 



This genus contains about forty species which are chiefly contained in 

 Europe, Asia and North America ; a few, however, have been described 

 from Central and South America, ]Xew Zealand, Madeira, &c. ; twelve 

 species have been considered as occurring in Europe of which six are found 

 in Britain ; one of these, however, H. obscurug, has lately been placed 

 in a separate genus, Hylastinus, by Bedel ; they may be known by the 

 seven-jointed funieulus and the globose or ovate club of the antennae ; 

 the head has a short but distinct rostrum with rather deep transverse 



