NEPINA. 581 



each side of it with 2 dark subtrapezoidal patches formed by small, 

 black confluent spots, and a few scattered punctures. Sciiiellum 

 with a narrow, yellow line at the sides. Elytra unicolorous through- 

 out ; Corium ; anterior margin on the basal 3rd very slightly reflexed, 

 and narrowly pale yellowish. Wings white. Sternum yellowish, 

 black in the middle, the sides with long, silky hairs. Legs greenish ; 

 coxce with strong, short hairs ; tliighs with very fine, short hairs ; 

 the edges of the groove finely serrate ; tihice at the end and the 

 spines brown ; cilia yellow. 



Abdomen beneath dull greenish or yellowish ; Connexlvum yel- 

 lowish, the posterior angle of each segment projecting in a small, 

 acute, black spine ; the entire margin with long silky hairs. 



Length, 5 — S'- lines. 



Common in summer in ponds and ditches where many water-plants 

 grow, swimming with rapid motion by means of the 4 hind legs. 



Section 'd.—lYUI'INJ* 



Family 1.— RANATRIDtE. 



Genus 1. — Ranatra, Fad. 



Long, subliuear, cylindrical. 



Head short, seen from the side pyriform, above convex, posterior 

 margin rounded ; Face ; central lobe prominent, not reaching the 

 anterior margin ; side lobes wider, shorter, rounded ; the face before 

 the lobes narrowed, with 2 callosities ; the sides parallel ; anterior 

 margin broad, obtuse. Antennce ; 1st joint annular; 2nd in length 

 subeqnal, with a stout, oblique, lateral process ; 3rd fusiform, stout, 

 reaching beyond the process of the 2nd. Eyes large, prominent, 

 almost semi-oval. Eostrum porrected, short, narrow ; 1st joint 

 greatly contracted at the base ; 2nd rather longer, subcylindrical ; 

 3rd shorter than the 2nd, conical ; lalritm rather long, slender. 



Thorax. — Pronotum very long, narrowest in the middle, a little 

 widened to the front, more so to the hinder angles ; anterior margin 

 roundly, posterior margin angularly, cut out. ScuteUum ?raal], 

 rhomboidal. Elytra pergamentous, laid sloping, roof-like, to the 

 sides, not so long as the abdomen ; Clavus i\^vvo\f ; Corium; on the 

 anterior margin nearly the whole length of the elytra; inner margin 



*■ Paire 45. 



