132 ADEPHAGA. [Truncafipennes. 



are represented in the Eiiropean fauna ; the Odacanthina, for instance, 

 are represented by one genus and one species, the genera Camonia and 

 Calophcena being entirely absent ; the Dryptina are only represented by 

 two genera {Zuphinm and Drypta) and four species, of which Ave possess 

 one ; the genus BracJdnus contains a fair number of species (about a 

 sixtli part of those known), but the large genus Pkeropsophus is repre- 

 sented by one only ; of the two hundred or more species of Lehia about 

 a dozen only are European, and many of the allied genera (e.g. Catascopus, 

 &c. ) are altogether exotic. 



The series is distinguished by the fact that its members have the 

 apices of the elytra more or less truncate ; there are, however, several 

 transitional forms concerning the position of which there has been con- 

 siderable dispute : we possess but one of these as British, viz. Masoreus. 

 According to Mr. Bates (Biol. Cent. Am. Carabidaj, p. 152, &c.), before 

 the true Truncatipennes come the subdivisions Subtruncati containing 

 Ega and its allies, and the Obtusipennes containing the Ctenodactylinaj. 



The tribes, as far as our fauna is concerned, may be divided as 

 follows : — 



I. Head with two supra-orbital setae. 



i. Tibial spurs long ; thorax transverse, with siiles 



rounded, not cordate or cylindrical Masoeeina. 



ii. Tibial spurs short ; thora.x cylindrical, or more or 

 less cordiform. 



1. Intermediate tibiaj of male occasionally dilated 



and squamulose beneath Ctmindina. 



2. Intermediate tibiae of male never dilated and 



squamulose beneath. 



A. Penultimate joint of labial palpi bisetose. 



a. Head prolonged behind eyes, joined to 



thorax by a serai-globular neck Odacantiitna. 



b. Head not prolonged behind eyes ; neck not 



semi-globular. 



a*. Basal joints of antennae glabrous ; apex of 

 elytra not membranous ; paraglossse, as a 

 rule, hardly exceeding ligula Lebiina. 



b*. Basal joints of antennas pubescent ; apex 

 of elytra membranous ; paraglossae slen- 

 der and projecting far beyond ligula . . PoLTSTicniNA. 



B. Penultimate joint of labial palpi plurisetose . Detptina. 



II. Head with one supra-orbital seta Beachinina. 



As, however, the distinctions given above are in many cases rather 

 scientitic than of practical service, it is better to give as well the follow- 

 ing table of those genera which are considered by some authors to form 

 the Lebiina proper : — 



I. First joint of antennae as long as the three following 



united; mentum somewhat orbicular DetptA, Jl 



II. First joint of antennae not elongate; mentum trans- 



verse. 



i. Tliorax elongate, cylindrical Odacantha, PayJc. 



ii. Thorax not cylindrical, usually more or less cordi- 

 form. 



