CADELLES-BEETLES. 



43 



beyond anything else. It is illustrated in Fig. 49, to show the 

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



F.-X M ILY TROGOS I T IDA E. 



(Caddies). 



Ips fasciaftis 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. Xone of these insects are espe- 



Pig. 50. Ips fasciat us, OM\. After Porhes. 



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

 species of Tenehrioidcs, frer[uently 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. vianritanica, 

 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 

 larvce 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. 



