302 BARON WALCKENAER ON THE 



Frischii, of which it is perliaps merely a variety : ^ but this 

 insect is met with as frequently on the leaves of the willow and 

 rose as on those of the vine ; and it is not one of those con- 

 sidered particularly noxious by the cultivator ; and for these 

 reasons probably did not attract the notice of agriculturists 

 in ancient times. 



Before we pass on from the word Spondylus, I ought not to 

 omit remarking that Fabricius has employed this word to de- 

 signate a genus of Coleoptera which he has formed in the family 

 Prionidce, and named Spondylis Buprestoides ; but this insect, 

 whose larva inhabits the wood of trees, can have no connexion 

 with the Spond/flus of ancient authors, the larva of which attacks 

 the roots of young or annual plants. It would seem that the 

 intention of Fabricius in making choice of this name, was 

 thereby to furnish an argument in support of his opinion that 

 there was some relation between the insects : now what I have 

 said at the commencement of these Researches, applies so 

 exactly to the case in question as to render further comments 

 unnecessary. 



3. Joulos, or Julus. — Centipede, 



The Joulos has even less claim than Spondylus to be included 

 amongst insects hurtful to the vine, though Suidas has called it 

 the worm of the vine ; but this lexicographer, who lived 

 in the middle ages, is the only writer who has so much 

 mistaken the Joidos of the ancients. From a comparison of 

 passages, it appears that the Joidos is an apterous or wingless 

 insect, with a great number of legs ; long, like a worm ; has a 

 sinuous mode of progression ; rolls up when touched ; and that 

 it is found in moist places. 



Modern naturalists have not made any mistake about this 

 insect, and they have retained its ancient name. The name 

 Jidus, given to a genus of insects by the moderns, corresponds 

 exactly with the Julus or Joidos of the ancients, especially if we 

 consider its modern signification to be restricted to the genus 

 Julus of Leach, ^ in his excellent Work on the Myriapoda, from 

 which he has very properly separated Polydesmus, and some 

 other genera. 



' Walckenaer, Faune Parisienne, vol. i. p. 185 ; Oliv., Entomologie genre Han- 

 neton, No. 39, pi. 2, f. 12, a, b, c, p. 34, vol. i. ; Sclicen. Synon. Insect., vol. i. 

 pt, 3, p. 193. 



' Leach, Zoological Miscellany, 1817, 8vo. vol. iii. pp. 32 — 48. 



