82 BEETLES. 



Genus Rhizotuogus, Latr. 



Extremity of the abdomen not produced. Antennae with 

 nine or ten joints, the third and fourth being of about equal 

 size, with a trilobed club, longest in the males. The tarsal 

 joints have a row of short bristles below. The beetles remain 

 hidden at the roots of moss, and fly by night. 



* E. solstiiialis, Linn. (Plate IX., Fig. 1). Wing-cases dark 

 brown, with grey pubescence and three black stripes. The 

 pygidium is finely granular, sometimes brown, with two 

 elongated yellow spots ; sometimes yellow, with a central 

 brown stripe. The antennae have nine joints. It appears in 

 June or July, commencing to fly at seven in the evening, and 

 is most destructive in those years when cockchafers are 

 abundant, as it follows up their ravages. The larvae live 

 in the same way as those of the cockchafer, but are 

 smaller, and difficult to distinguish from the half-grown 

 white worms. It is somewhat local. 



R. fuscus, Scop, (ater, Herbst) (Plate IX., Fig. 2). This is 

 elongated and convex ; the male shining black, with reddish- 

 brown antennae, dark brown elytra, and long, erect, yellowish- 

 grey hair on the head and pronotum. The female is more 

 convex, orange, with pale yellow elytra, and short hair on the 

 head and pronotum. It is a native of Southern Europe, and 

 begins to fly at from eight to ten o'clock at night. 



B. wstivus, Oliv. (Plate IX., Pig. 3). Elongated, oval, 

 slightly convex, reddish-ochreous. The margin of the pronotum 

 and a broad stripe along the suture, or sometimes the entire 

 elytra, are darker. The legs are pale yellowish-brown. The 

 sternum is covered with shaggy hair, and the abdomen is very 

 sparsely clothed, being often almost naked. The hind femora 

 and the abdomen of the male are bristly. The antennae have 



