BEETLES. 157 



Genus Eumolpus, Kugel. 



Pronotum very convex, broader than long, and expanded 

 in the middle. Wing-cases nearly quadrangular. They are 

 found on water-plants. 



E. ohscurus, Linn. (Plate XIX., Fig. 22). Black, slightly 

 shining, with fine grey pubescence. It is found in ditches 

 on willow-herb, and is common in most parts of the Continent. 



Genus Cryptocephalus, Geoff. 



Cylindrical, with the head retracted. Pronotum usually as 

 large as the wing-cases, which are rounded. There are pits 

 on the last segment of the abdomen in the females. These 

 beetles live on low plants and shrubs, and the larvae have a case. 



* a coryli, Linn. (Plate XIX., Fig. 23). Black, with the 

 wing-cases red and rather coarsely punctured. Two dots on 

 the front of the head, and the basal joints of the antennae 

 are yellow. The pronotum is black in the male, but red in 

 the female. It lives on hazel, alder, and willow, but is rare. 



C. cordiger, Linn. (Plate XIX., Fig. 24). Elytra cherry-red, 

 with two black spots on each, and a fine black border. The 

 pronotum is marked with yellow. It is found on willow, 

 hazel, and alder in many parts of the Continent. 



C. octopunctatus, Scop. (Plate XIX., Fig. 25). Elytra red, 

 each with two variable black spots, and a raised lateral border. 

 It is common in many places on the Continent. 



G. violaceus, Fabr. (Plate XIX., Fig. 26). Blue or greenish, 

 finely pubescent beneath. It is common in Southern Europe 

 on birch and willow. 



* G. sericeits, Linn. (Plate XIX., Fig. 27). Golden -green, 

 violet or reddish-purple, with two slight depressions on the 

 pronotum. It is common on flowers. 



