X78 [January, 



in H. micacea ; the spiracles oval and black, tlie ventral and anal legs 

 barred with black, the feet fringed with dark-brown hooks that clung 

 to any surface they touched ; the skin, genei'ally soft and smooth, 

 glistened slightly at the wrinkles while the larva was crawling. 



The cocoon was about an inch long and half an inch wide, of 

 elliptical figure, composed of earthy particles mixed with moss and 

 other vegetable comminuted mattei'. the inside smoothly lined with 

 brownish silk. The pupa was 9 lines in length, of stout and robust 

 character, the eye-pieces rather prominent, and beneath them the 

 head produced to an obtuse point ; the thorax thick, with a swollen 

 rounded form, the wing-covers and all other parts clearly defined and 

 smoothly wrapped close to the body ; the lower abdominal rings tapered 

 gently to the tip which ended with two fine points ; in colour the head, 

 thorax, and wing-covers were of a very deep olive-green, the abdomen 

 of a less deep and brownish olive-green, the divisions of the movable 

 rings darker, the surface shining ; the two anal points had become 

 entangled in silk threads that held the old larval skin, and this skin 

 still retained the very remarkable anal plate, already described, in such 

 perfect condition as to afford the most satisfactory identification. 



Emswortli : December 3rd, 1883. 



CONFIEMATION OF THE MIGRATION OP APHIDES. 

 BY JULES LICIITENSTEIN. 



In the October (1883) No. of the Ent. Mo. Mag. my good friend 

 G. B. Buckton, of Haslemere, replying to my criticism of his " British 

 Aphides" says :---" The subject of migration of Ajyhides is of consider- 

 able interest from a scientific, as well as from an economic, point of 

 vievv, and the production of well-ascertained facts will at once assert 

 their value, and eventually hold its own against all comers." 



I hope to be able to-day to convince the readers of the Ent. Mo. 

 Mag., by affording undoubted evidence as to the fact of migration of 

 the elm plant-lice. 



Prof. Horvath, of Budapest, discovered in the last months of 

 1882 that a root-feeding Aphid, which he had determined as Pemphi- 

 gus zece-mdidis, Low and L. Duf. (= Boyeri, Passerini, = radicum, 

 Eonscol.), after becoming Avinged, flew from the maize roots to the 

 trunks of elm-trees, and there deposited its sexed progeniture. 



