The Anthrax 



a double row of little thorns, with a hollow in 

 between. I count about twenty-five twin- 

 toothed arches to one segment, which gives a 

 total of two hundred spikes for the four rings 

 thus armed. 



The use of this rasp, or grater, is obvious: 

 it gives the nymph a purchase on the wall of 

 its galle'ry as the work proceeds. Thus an- 

 chored on a host of points, the stern pioneer is 

 able to hit the obstacle harder with its diadem 

 of awls. Moreover, to make it more difficult 

 for the instrument to recoil, long, stiff bristles, 

 pointing backwards, are scattered here and 

 there among the climbing-belts. There are 

 some besides on the other segments, both on 

 the ventral and the dorsal surface. On the 

 flanks, they are thicker and arranged as it were 

 in clusters. 



The sixth segment carries a similar belt, but 

 a much less powerful one, consisting of a single 

 row of unassuming thorns. The belt is weaker 

 still on the seventh segment; lastly, on the 

 eighth, it is reduced to a mere rough brown 

 shading. Commencing with the sixth, the 

 rings decrease in width and the abdomen ends 

 in a cone, the extremity of which, formed of 

 the ninth segment, constitutes a weapon of a 

 new kind. It is a sheaf of eight brown spikes. 



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