50 Mr. R. H. Lewis's Descriptions of 



rior and intermediate tibia apparently without spurs, though 

 when viewed under a good magnifier, having their internal 

 margin clothed with a series of short fine cilise, the inter- 

 mediate tibiae being less ciliated than the anterior. Posterior 

 tibice but slightly curved, somewhat prismatical ; externally, 

 with the superior margin clothed with fine spinulae, the in- 

 ferior margin with eight or nine spines of nearly equal size, 

 or stouter in the middle of the tibia ; internally, with a scanty 

 series of spinulse directed downwards, and a dense row of 

 cilise directed inwards ; the apex surrounded with small spines. 

 Tarsi narrow, triarticulate ; the anterior and intermediate with 

 the terminal, and the posterior with the basal joints longest. 

 Allied to Agallia, Curt., from which, however, it may be readily 

 distinguished by the antennae. In that genus they are inserted in 

 the face between the inferior margin of the eyes ; the tM^o first 

 joints very distinct and not concealed, the last a fine seta, as long as, 

 or longer than the head, prothorax, and scutellum taken together : 

 in this the two first joints are very short, and almost concealed in 

 the excavation, the last joint the length only of the prothorax. 

 From Bythoscopus, Germ., the length of the face and shape of the 

 ovipositor, which in that genus is short and much curved upwards, 

 will at once distinguish it. 



In some species the superior wings are semi-coriaceous, in others 

 with some portion hyaline, and in others wholly membranaceous. 

 This genus will, however, be more correctly divided, from the form 

 of the head and thorax, as follows : 



A. (Fig. 3.) Fades lilana ; (Fig. 3, b.) Prothorax transversiis, 

 obcordatus. 



Sp. 1. M. virescens, Fab. Flavo-viridis. 



Long. Corp. 2-j- lin., lat. corjD. 1 lin. 



Cicada virescens. Fab., Ent. Syst. 4. 46. 84. Syst. Rhyng. 79. 



Yellowish green ; superior wings semicoriaceous, subhyaline, 

 the nervures towards the apex whitish green ; inferior wings hyaline, 

 with white nervures ; apex of the outer sheaths of the ovipositor 

 orange ; the ovipositor castaneous. 



Willows, Battersea, Coombe. July, August. 



I have deposited a specimen in the Museum of this Society. 



B. (Fig. 4.) Fades disco tumido ; (Fig. 4, b.) Prothorax trans- 

 versiis, ovatus, postice exdsus. 



Sp. 2. M. flavicoUis, Linn. Fusco-ferrugineus, capite thoraceque 

 viridi-flavis. 



