220 



ARACHNOIDEA, 



CASE heavy body, rendered still more unseemly by the filth with which 

 XIII. ^ ' , , ' 



they cover themselves, upsets them at e very- 

 step they take when they walk on a flat 

 surface. Their larvae are like the perfect 

 insect, only softer and whiter, and they are 



always covered 

 by a layer of 

 soil or dirt, pel- 

 lets of which 

 they appear to 

 be to the on- 

 looker. The 

 tarsi are mo- 

 nodactylous in 

 the larva, tri- 

 dactylous in the perfect insect. The present species is of a violet 

 brown colour, like the lees of wine. It is common everywhere 

 near Paris, but is difficult to detect on account of its earthy cover- 

 ing, which, moreover, it is difficult to remove from its back, on 

 account of its lateral spines being interlaced and mixed up with it. 



Larva of Notlirus spini^er. _ Claw of Notbnis spinip^er. 



O">.ooo8o in length. Copied from Nicoljt. Copied from Nicolet's fitjure. 



IJo. 18. NOTHRUS HORRIDUS {Hemi.). — 18. Magnified sketch of perfect insect, copied 

 from M. Nicolet's figure. 



Kothrus horridus, covererl with its clo.ik of cTrt. 

 Copied from llcniiann's fijjure. 



Kothrus horridu^-, on.00112 in lenj^th. 

 Copied In nil Xicolfct. 



