APHROPHORA SALICIS. 83 



Larva of Aphrophora alni. — Oblong ; with head, 

 prothorax, legs, and tip of the tail pale green. Abdo- 

 men tumose, bright yellow, with white edges to the 

 rings. Eyes variable as to colour and conditions of 

 maturity, but usually pale green with red pigmental 

 cells. Frons or mask much swollen. 



Size, lO'O millimetres, or 0*40 inch. 



Fupa. — More linear than the larva. The head 

 smaller. Eyes black. Wing-cases brown. Abdomen 

 orange-yellow. Colour brighter underneath. Legs 

 green, as also is the saw-case in the female. Frons 

 with pale transverse striations. 



When the larva is removed from its covering of froth, 

 it repeatedly lengthens and contracts the rings of its ab- 

 domen, shortening them like the slides of a telescope. 



It is fairly common on the marshes of Godalming 

 and Haslemere, but is very plentiful at Brockenhurst, 

 Hampshire. 



Inch. Millimetres. 



Expanse of imago 0-75 18-97 



Body 0-35 X 0-09 8-89 x 2-22 



Aphrophora salicis, DcGcer. Plate XXIII., fig. 1. 



Cicada spumaria salicis, DeGeer. 

 Cercopis rustica, Fab. 

 Cicada salicis, Fall. 

 Aphrophora scdicina, Am. et Serv. 



„ salicis, Flor ; Marsh. ; Kirsch. ; Scott ; 



Sahib. ; Edw. pt. i. p. 97. 



General colour ochreous-yellow, almost concolorous. 

 Whole body and elytra finely punctured. Eyes brown. 

 Nervures of elytra paler. Sometimes the trace of a 

 white spot may be seen on the costa. 



This insect is far rarer than the preceding, and is a 

 trifle larger than it. It may generally be separated from 

 A. (dni by the absence of brown barrings on the elytra. 



Size, from lO'O to 10-5 millinuHres, or 0'39 inch. 



g2 



