130 THE ENTOMOLOGIST. 



it is in part effected by the muscular action of the body, but 

 principally by the ja^vs of the larva. I give two instances by 

 way of illustrating my meaning : here, on the one hand, is a 

 larva that wishes to move sideways ; this it effects by giving 

 its body a sudden and violent twist or jerk, by which means 

 it moves its body and case sideways a quarter of an inch or 

 so : on the other hand we have a larva which, feeling dis- 

 posed to propel its body forward, .does so by simply pro- 

 truding its anterior segments, and, catching hold of any 

 object immediately in front of its head, pulls its body and 

 case forward by the sheer strength of its jaws ; by this 

 means the larva, though destitute of legs, is enabled to move 

 about on a level surlace with almost as much ease as an 

 Adela or Incurvaria larva. On first perceiving this pecu- 

 liarity in their economy I was impressed with an idea that 

 they would possibly recommence feeding, and accordingly 

 supplied them with some unblemished Cornus leaves, over 

 which I kept a strict watch for the slightest indication of 

 their having been eaten ; continued observation, however, 

 convinced me it was contrary to their habits to partake of 

 any food after having constructed their cases. — C. Healy. 



En tomologica I Periodicals. 



Hie ^ EniomoloyisVs Moulhly Mogaziiie.'' — No. 6 contains 

 the following papers on exotic li^ntomology, all of which are 

 written with the accustomed excellence of the various con- 

 tributors : that by my friend Mr. Baly is entirely in Latin, the 

 true language of Science. Thus enriched this admirable jour- 

 nal cannot fail to rank high among the current entomological 

 literature of Europe. "On a singular Caddis-worm Case 

 from Ceylon, by R. M'Lachlan." " New Species of Butter- 

 flies from Guatemala and Panama, by H. W. Bates." " Notes 

 on the Diuinal Lepido])tera of North-Western India, by Capt. 

 A. M. Lang (with descriptions of new species by F. Moore)." 

 " Descriptions of some uncharactevized Genera of Phyto- 

 phaga, by J. S. Baly." There are also a number of minor 

 contributions, of which I give a more detailed notice below, 

 omitting those which have already appeared either in the 

 ' Zoologist' or 'Entomologist,' and one or two others which 

 are of no particular interest: — 



