BEETLES. 27 



cases edged with white. Length, 10 mm. It frequents the 

 banks of streams and ponds. 



* A. viduus, Panz. Dark bronzy-green above ; legs and feet 

 black. It is rather smaller than the last species. 



Genus Hakpalus, Latr. 

 Usually dark-coloured beetles of moderate size, with the 

 pronotum as large as the abdomen. They are found under 

 stones and on paths. 



* H. azureus, Fabr. Blue or green above, and pitchy-brown 

 beneath, with red legs. Local on the chalk. 



* H. sabulicola, Panz. This is more than twice as large as 

 the last species. The pronotum is thickly punctured, and the 

 legs are reddish-brown. It is found in chalky and sandy places. 



* H. obscAirits, Fabr. {nee Daws). Is very similar, but rather 

 smaller. This species is very rare. 



* H. ruficornis, Fabr. (Plate III., Fig. 28). Pronotum only 

 punctured on the front and hind borders. The antennas have 

 a thick golden-yellow pubescence. It is common in gardens, 

 where it is often dug up with the mould. 



* H. cc7ieus, Fabr. (Plate III., Fig. 27). Green, blue, coppery- 

 red or blackish, with the antennae and legs red. The thorax 

 has the angles obtuse. It is larger than azureuSy and is very 

 common throughout the kingdom. 



Genus Callistus, Bon. 

 Pronotum nearly heart - shaped, antennae filiform, not 

 pubescent. The only species is richly coloured, and is found 

 under stones. 



* C. lunatus, Fabr. (Plate III., Fig. 29). Pronotum red,, 

 elytra yellow, with three black spots on each. It is local^ 

 being found chiefly in chalky districts. 



