CADELLES-BEETLES. 



4-3 



beyond anything- else. Tt is illustrated in Fig'. 49, to show the 

 structure of such beetles, which could not be shown in Fig. 48. 



FAMILY TROGOSITIDAE. 



(Caddies). 



Ips fasciatus Oliv., shown in Fig. 50, is sometimes very abund- 

 ant among and beneath heaps of carrots. It is a rather pretty 

 insect, shining black with two bright, interrupted, reddish or 

 orange bands across the elytra. None of these insects are espe- 



Fig. 50. Ips fasciatus, Oliv. After Forbes. 



cially injurious. This can not be said about the nearly related 

 species of Tenebrioides, frequently called "cadelles." -These in- 

 sects are found in large numbers in barns and mills, where they 

 feed on grain, meal and flour. In mills they can cause great 

 damage, not so much by eating the flour as by eating holes in the 

 fine and expensive bolting silk. One species (T. mauritanica, 

 Linn.), is shown in Fig. 51- 



Such beetles are sometimes found in most unexpected places. 

 The illustration (Fig. 52) shows the work done by their 

 larvae in some books stored in a bin. Whether these insects were 

 after knowledge, and studied a Norwegian book or not, is left an 

 open question. 



