(waSwl) 
Il. A Synopsis of British Homoptera-Cicadina. 
Part II. By James Hpwarps, F.E.§. 
[Read October 5th, 1887.] 
Puate III. 
XII. TETTIGONIDA. 
Frons and clypeus very convex, the passage from the former to 
the crown widely rounded. Thighs with a pair of spines on the 
upper side at the apex. 
The British species of this family constitute a well- 
marked group, combining the tumid frons of the 
Cercopide with the multispinose tibiew of the Acocepha- 
lide and following families. The affinities of the group 
under consideration will be best appreciated on a com- 
parison of the structure of the head in Hvacanthus and 
Philenus; the structure of the frons and the ridge 
dividing the crown from the face is very similar in these 
genera, while the situation of the ocelli and the multi- 
spinose tibie of the former indicate an approach to 
Acocephalus. Our two genera may be thus distin- 
guished :— 
Frons longitudinally carinate .. 36 .. i, EvacaNntTHUus. 
Frons non-carinate abe S: oe .. Ul. TETTIGONIA. 
i, Evacanruus, Lep. et Serv. (Pl. IIL, fig. 1). 
Lep. et Serv., Enc. Méth., x., 612 (1825). 
Upper side pubescent. Ocelli just beyond the eyes three or four 
times as far from each other as from the sides of the crown. The 
latter with an anchor-shaped keel, crossed about its apical third by 
a more or less distinct straight ridge, which runs from one ocellus 
to the other; on each side at the base a callus or a short outwardly 
oblique keel. Scutellum with a transverse impressed line before 
the apex, and two punctures near the base. Submarginal wing- 
nerve reaching the costa. 
TRANS. ENT. SOC. LOND. 1888.—-PART I. (MARCH.) 
