84 BBITI8H CICADA.. 



Genus XVI.— PHILiENUS, Stal 



Body oblong or sub-linear. Head often deltoid. 

 Vertex not carinated above ; fore-margin sulcate. 

 Ocelli equally distant from the eyes as they are from 

 themselves. Rostrum not projecting beyond the second 

 coxae. Scutellum small, longer than broad. Wings 

 not folding or overlapping at their apices. Inter- 

 marginal vein not interrupted. — (StAl.) 



The larva; conceal themselves in foam, whence the 

 generic name Vtijclm given to the species by Flor and 

 by Scott, from -nruzs, I spit. 



Only four British species are generally recognised as 

 such. Scott says that " they are strictly attached to 

 grasses and low plants," and that they "never occur 

 on trees and shrubs except by accident." 



Phil.enus spumarius, Linn. Plate XXIV., figs. 1 to 3. 



Cicada spwuaria, DeGeer. 



Cercojns spimiaria, Fab. 



Aphrophora hifasciatu, leucophthalma, Hneata, &G.,Geim. 



Ptijclus spumarius, Flor ; Kirsch. 



The synonyms of this common species are very 

 numerous, and need not be given here. Sahlberg's 

 ' Cicadariae ' may be consulted for numerous varieties, 

 which are often strongly marked both in colour and 

 form. 



The larva is soft and fleshy, and differs in several 

 w'ays from that oi Aphrophora. Colour greenish, yellowy 

 or brown. It usually feeds with its head downwards. 

 Both the pupte and larvae blow up bubbles of foam. 

 The froth is a trap for many small insects, grains of 

 pollen, and small organisms. Eed spots on the head of 

 the larvae indicate the sites of the future ocelli. The 

 antennae may be shown to consist of numerous (at 

 least seven) joints, as in Cicada proper (see Plate 



