230 MODERN CLASSIFICATION OF INSECTS. 



to be composed of three divisions {jig. 23. 13.). I know no other in- 

 stance in which the two posterior legs are rudimental, whilst the four 

 others are of the ordinary size. The last segment of the body is 

 rounded and unarmed. 



M. Westermann (in Silbermann's Jtev. Ent. No. 3.) has published a 

 short notice of the B. ocellata (India), and B. cuprea (Cape G. H.), 

 of which he had observed the larvae (which he did not fully describe) ; 

 the latter species, as well as its larva, inhabits a species of Mesembry- 

 anthemum ; the larva being very long, in proportion to its thickness, 

 and of a yellow colour, with a brown head. I regret that he has 

 not been able to furnish me with further details. 



M. Audouin has discovered a lai'va, considered by him to be that 

 of D. berolinensis, which forms numerous narrow galleries in the solid 

 wood of beech-trees. No description has, however, yet been published 

 of it. {Ann. Soc. Ent. France, 1836, p. xvii.) I am indebted to 

 this distinguished entomologist for the accompanying figures (23. 8. 

 and 23. 9.) of this larva, from which it will be seen that it nearly 

 resembles, in many respects, the larvae of the Cerambycidae. It 

 is of a fleshy consistence, and the large semicircular anterior seg- 

 ment of the body appears to me to represent the prothorax, within 

 which the head is retractile. The prothoracic spiracle may be 

 seen in the short piece which succeeds this large segment, and 

 which is, I presume, the membranous connection between the pro- 

 and mesothorax. M. Audouin, I believe, on the other hand, con- 

 siders it to be the prothorax itself. There do not appear to exist the 

 slightest rudiments of feet, and the terminal segment of the body is 

 entire. 



M. Aube has more recently published the description of the prepa- 

 ratory states of Agrilus viridis, the larva of which he had detected 

 in the stems of young beech-trees, which are much injured by its at- 

 tacks. This larva is apod, and nearly agrees with that described 

 above ; being broadest in front, and gradually diminishing towards the 

 extremity of the body, which is armed with two horny points. The 

 larvae underwent their change to pupae at the beginning of May, and 

 the imago appear about the middle of June. The pupa is consider- 

 ably elongated, but does not offer any peculiarity of form {Ami. Soc. 

 Ent. de France, 1837, p. 190.). M. Audouin has also discovered the 

 larva of another species of Agrilus burrowing in the wood of the 

 pear. 



