Hylesinina.| RHYNCEOPHORA. 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 Dryocetina; through Hylastes it presents 
affinities towards the Cossonide (the antennze being much the same in 
form), and through several of the other genera towards the Platyrrhinid 
(Choragus, &c.) ; the shape of the club of the antennz and the number 
of joints to the funiculus of the antenne 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 (Hylurgus, containing only 
the two species H. ligniperda and H. Micklitzi, Carphoborus, containing 
only C. minimus and C. pint, Dendroctonus, Phleosinus and Phleotribus) ; 
their names are very much confused by different authors. 
I, Eyes not divided ; third tarsal joint nearly always 
dilated and bilobed. 
i. Funiculus of antenne with seven joints. 
1. Club of antenne globose or ovate. 
A. Anterior coxze contiguous ; first joint of the 
club of the antenre very large, shining, the 
following very short. . Steen oh en EL WEWASTICS Hira 
B. Anterior coxa widely distant ; first and 
second joints of the club of the antenne large, 
almost equal, the following very short . . . Hytastrnus, Bedel. 
2. Club of antennz compressed, oblong . . . . HyYLEsINUs, F. 
ii. Funiculus of antenne with six joints. 
1. Anterior coxe narrowly separate; thorax with 
long villose hairs at sides; length 4-5 mm. . . MyELoPuitus, Lich. 
(Hylurgus pars, Brit. Cat. ye 
2. Anterior coxee rather widely separate; thorax 
evenly pubescent; length 2} mm... . . . CIssoPHAaus, Chap. 
iii. Funiculus of antennze with five joints. 
Club of antenne oval, nearly globose, formed 
of four joints fitting closely together . . XYLECHINUS, Chaputs. 
(Carphoborus, Brit. Cat.). 
Club of antenne formed of three loose detached 
joints. . See ee PREG OPHTHORUS= IW Oll. 
II. Eyes completely divided ; third tarsal joint 
entire not broader than the preceding ; antennsz 
with a solid ovate club, and with the funiculus 
HiVe=] OMe Cemayiasietane ee (fst eee een ee) ete LOLYGRARH US irs 
HYLASTES, Er. (Tomicus, 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, New Zealand, Madeira, &c. ; twelve 
species have been considered as occurring in Europe of which six are found 
in Britain ; one of these, however, H. obscurus, has lately been placed 
in a separate genus, Hylastinus, by Bedel ; they may be known by the 
seven-jointed funiculus and the globose or ovate club of the antenne ; 
the head has a short but distinct rostrum with rather deep transy erse 
