-26 CLAVICORNIA. [E>ura>a. 



sixteen occur in Britain ; many of the species are difficult to determine ; 

 some of them are very distinct, so much so that they have been held to 

 form separate genera ; two of these, Omosiphora and Micrnrtila, have 

 heen adopted above, and with almost as much reason a third might lie 

 introduced Dadopora, Thorns. to include E. decemguttata and E. 

 iliji'nsa ; other species, however, come exceedingly close to one another, 

 ami it is almost impossible to distinguish them except by comparing 

 them with authentic types ; the table, therefore, given below must be 

 regarded as merely provisional ; all the species are more or less testaceous 

 or reddish in colour, and the males have a distinct extra abdominal seg- 

 ment; in size and colour the same species is often very variable, and this 

 occasions much confusion ; the members of the genus live under bark, 

 at flowing sap, and in flowers, and to a certain extent they may be 

 separated by their habitat ; this point, however, must not be pressed too 

 far, as the flower-frequenting species (e.g. E. flored) are occasionally 

 found at sap. 



The larva of E. obsoleta is described and figured by Perrisj Ann. Fr. 1862, 184, 

 t. 5, ff., 525-533, and by Bouche, Naturg. des Insekt, p. 188 ; it does not call for much 

 rcniiirk, being linear and somewhat depressed with a roundish head and short 4-jointed 

 11 ii iniiiif ; the last abdominal segment bears two diverging corneous cerci. 



I. Tibia) widely dilated at apex ; intermediate coxa) almost 



contiguous ; hind femora in male either furnished 



with a blunt tooth or thickened. (Dadopora, Thorns. ) 



i. Size larger (3J-4 mm.); spots on elytra usually well 



marked E. DECEMGUTTATA, F. 



ii. Size smaller (2 mm.) ; spots on elytra more or less 



confluent E. DIFFUSA, Bris. 



II. Tibiae at most slightly dilated at apex, intermediate 



pair often sinuate in male ; intermediate coxae mode- 

 rately separate ; all the femora simple in both sexes. 

 (Epurcea, i. sp.) 

 i. Upper- and under-sides entirely testaceous or rufo- 



testaceons, unicolorous ; disc of thorax not darker 



than the margins. (Occasionally these species have 



a dark spot or two towards the apex of the elytra, 



but this is usually deceptive, being caused by the 



folding of the wings against the semi-transparent 



elytra.) 



1. Species more or less oval and convex ; anterior 



margin of thorax strongly eraarginate. 



A. Antennae with the last joint broader than the 



penultimate E. .ESTIVA, L. 



B. Antennae with the last joint narrower than the 



penultimate. 



a. Size smaller (3 mm.) ; punctuation stronger . E. MELINA, Er. 



b. Size larger (4 mm.) ; punctuation less strong E. SILACEA, Er. 



2. Species strongly oblong ; anterior margin of thorax 



almost straight or only feebly emarginate. 



A. Punctuation extremely fine, almost obsolete . E. OBLONGA, Herlsf. 

 U. Punctuation distinct. 



a. Club of antcnnno dark; form more elongate . E. LONGUIA, Er. 



b. Club of antennae coucolorous; form shorter . E. FLOEEA, Er. 



