154 BEETLES. 



* 0. cerasi, Fabr. (Plate XIX., Fig. 3). This is a variable 

 insect, which may be pale reddish-yellow or black, with the 

 pronotum yellow or entirely black. It is found on apple- 

 blossom and flowering birch, white-thorn, &c. It is rare. 



Genus Donacia, Fabr. 

 Wing-cases much broader than the pronotum, rather flat, 

 with obtuse projecting shoulders. The hind femora are longer 

 and generally thicker than the others. They live on water- 

 plants. 



* D. crassijjes, Fabr. (Plate XIX., Figs. 4 and 9). Metallic- 

 green or bluish, with the base of the antennse and the legs 

 reddish. The hind femora of the male have two teeth. It 

 is not uncommon on water-lilies. 



* I), saf/ittarice, Fabr. (Plate XIX., Fig. 5). Light green, 

 with a golden shine, with fine pubescence. This species closely 

 resembles *D. lemnce, Fabr., which has, however, a longitudinal 

 purple stripe on the elytra. It lives on water-plants and on 

 reeds. 



* I), discolor, Panz. (Plate XIX., Fig. 6). Pale green, blue or 

 blue-black ; the front angle of the pronotum projecting as a 

 small pointed protuberance. It is found in damp meadows 

 and on aquatic plants. 



* I), menyanthidis, Fabr. (Plate XIX., Fig. 7). Golden- 

 green, with silvery-white pubescence. The antennse and legs 

 are reddish. The hind femora reach as far as the end of the 

 elytra. The beetles live gregariously on the leaves of reeds 

 and iris. 



J), tomentosa, Ahrens. (Plate XIX., Fig. 8). This is bronze 

 colour or greenish, with the base of each joint of the antennae 

 and the legs blackish. It is found in Germany on Typha, Foa, 

 and Sparganium. 



