ACOCEPHALtJS ALBIFRONS. 



Genus XXIX.— ACOCEPHALUS, Germar. 



Body oblong. Head with the eyes hardly broader 

 than the pronotnm, slightly emarginate at the base. 

 Vertex angularly 23rodiiced. Ocelli placed near its 

 anterior margin, and between themselves twice the 

 distance from the eyes. Frons slightly convex. Eos- 

 trnm slender, and longer than the clypeiis. Antennas 

 inserted within fovea3 near the temples; second joint 

 cylindrical, a little longer than the first. Eyes mode- 

 rate or small. Pronotum broadly rounded forward. 

 Scutellum shortly triangular ; apex acute. Elytra 

 narrow, rounded behind, and without an appendix or 

 limbus. Wings furnished with five longitudinal veins, 

 the first approximating to the middle of the marginal 

 costal vein, and joined before the apical with the 

 second transverse vein. Intramarginal vein obsolete. 

 In some species the wings are rudimentary, whilst in 

 others the bounding nervure is seen only partly deve- 

 loped. 



AcocEPHALus ALBIFRONS, Liuii. Plate XL., figs. 1 to 1 d, 

 and Plate XLL, figs. 1 to 1 c. 



Cicada albifrons, Linn. 



Aphrodes testudo, Curt., also concinna. 



Acocephalus arcuatus and confusus, Kirschb. 



,, albifrons, Flor; Marsh.; Sahib.; Sign, 



pi. ii. fig. 14 ; Edw. pt. n. p. 21. 



,, nigropiinctatus, Sahib., var. 



,, interniptus and polystolus, Scott, var. 



Variable as to colour, marking, and size. 



Male, occurs in the macropterous and brachelytrous 

 form. Head, pronotum, and scutellum ochreous, or 

 ochreous-yellow. In some individuals these parts are 

 spotless, but in others they are marked by variously- 



