Platyrrhinide. | RHYNCHOPHORA. 109 
. 
and, in many cases, very long rostrum; they are perhaps re presentatives 
of one of the most archaic forms of the Coleoptera. The Anthribide, 
as represented in our fauna, may be divided into the two following 
tribes :— 
I. Antennz inserted at the sides of the rostrum, with the 
point of insertion invisible from above. . . . . + . + PULATYRRHININA. 
II. Antenne inserted on the upper surface of the rostrum, with 
the point of insertion visible from above. . . . + . + CHORAGINA. 
PLATYRRHININA. 
This tribe contains nearly all the members of the family and includes 
the Anthribina and Brachytarsina of Thomson ; the species are variable 
in size, and especially in the length of the antenna, but they are closely 
allied by reason of their very short and broad rostrum, and by having 
the antenne inserted at the sides of the rostrum with the point of the 
insertion invisible from above. 
It appears best to adopt the names here used for the tribe and family 
in preference to Anthribina and Anthribide, as the name Macrocephalus 
is with advantage employed for the insect known to us as Anthribus 
albinus, the generic name Anthribus having been in part referred to 
Brachytarsus by some authors ; the six* European genera belonging to 
the tribe are represented in Britain, with the exception of Phanotherion 
and Cratoparis. 
The larve of nearly all the Curculionidae are feeders on vegetable 
substances ; a notable exception is, however, furnished by the species of 
Brachytarsus, the larve of which are parasitic on various Cocci. 
The British genera may be distinguished as follows :— 
I. Thorax without a distinct transverse ridge before base. 
i. Rostrum not bilobed ; antennze short; anterior coxz 
contiguous ; size small EMEMES To a eo eee 
ii. Rostrum strongly bilobed in front; antennz long, 
especially in male; anterior coxe distant ; size 
LEP eget) sc duermate ciel oy anus) 2 ysl MACROCEPHALtS, Ol. 
(Anthribus, Brit. Ent.) 
BRACHYTARSUS, Schénh. 
Il. Thorax with a distinct transverse ridge before base. 
i. Thorax with a strong dilatation at sides and with 
the transverse keel before base interrupted in middle ; 
Tia SONG Me ge Sie. ae eo ao aa: 
ij. Thorax without dilatation at sides and with the 
transverse keel before base not interrupted; size 
alintioeniat att ni KACGIDI colton 0 “cet! an LROPIDERES, Schinh. 
PLATYREHINGS, Clairv, 
_ * Enedreutes Schinh. is here regarded asa partof Tropideres : a long description of 
the larva of Enedreutes onyacanthe is given by Perris (Larves des Coléoptéres, 
355—7). 
