BEETLES. 93 



then gradually tapering to the extremity. They appear in June 

 and July, and crawl about on the leaves of the food-plant. 



* A.hignttatus, Fabr. (Plate X., Fig. 10). Elytra rounded 

 behind, green or blue, with two sharply -defined white spots. 

 It is found about the end of May. The larva lives in the 

 bark of oak-stumps. It is very local. 



* A. sinuatus, Oliv. (Plate X., Pig 11). Olive-green beneath, 

 with a metallic shine ; head and pronotum coppery. Elytra 

 dark reddish-purple, with an elongated spot of white hair 

 pointed behind, which is frequently absent. Length, 8-9 mm. 

 It is found on the young shoots of oak-trees and on may- 

 blossoms, but is very rare in Britain. 



Genus Trachys, Fabr. 

 Pronotum narrowed in front; elytra triangular. Antennae 

 short, the first two joints thickened, the next four thinner, 

 and the last five suddenly obtuse and serrated and expanded. 

 They are mostly small species, and the larvae mine the leaves 

 of their food-plants. 



* T. minuta, Linn. (Plate X., Fig. 12). Metallic -black, 

 usually with a blue shine, and sparingly hairy. The elytra 

 have four undulating bands. It frequents sallow, and the 

 larvae mine brown passages in half the leaf. It is local. 



Family XXV. EUONEMIDiE. 



These beetles are similar in form to the Elateridce, but 

 have little or no power of jumping. The presternum has a 

 projection behind, which fits into an excavation of the meso- 

 sternum. The antennae have eleven joints, and are serrated or 

 pectinated ; rarely with three larger terminal joints. The 

 abdomen is composed of five segments. They live in old 

 rotten wood, and most of them appear to avoid the light and 

 to be nocturnal in habits. 



