134 Major-Gen. Hardwickk on Cermatia longicornis 



Order. HEMIPTERA. 



Fam. GERRIDJE. 



Genus. GERRIS. Latr. Cimex. Linn. 



Gerris laticaudata. 



G. rufa, antennis tarsisque nigris, caud^ utrinque bidentatci su- 

 pra unguiculatd infra penicillatd. 



Tab. VI. Fig. 1—4. 



Antennce filiform, four-jointed, the first elongate, all cylindrical, 

 porrected, black ; the last joint shortest and incurvate. Head 

 shorter than the thorax ; ei/es prominent ; snout inflected, 

 short. Thorax roundish, convex, smooth ; thicker and 

 shorter than the abdomen. Body sublinear, of eight di- 

 stinct rings and a dilated tail, pointed at the apex, and fur- 

 nished on each side with a pencilled tuft and a hooked 

 seta. Wings incumbent, cruciate, membranaceous, hyaline, 

 subequal. Legs, the anterior pair simple, stronger than the 

 rest, porrected ; the tarsi two-jointed. The anterior thighs 

 compressed, with the inferior margins densely hairy ; the 

 second pair twice as long as the first, and having their in- 

 ferior margin ciliated ; the third pair rather longer than the 

 second, with the thighs cylindrical, armed, as in the Grass- 

 hopper tribe ; the tarsi of the four posterior feet are appa- 

 rently two-jointed, but so finely tapered as to require a strong 

 lens to detect the articulation and the didactyle claws. 



The prevailing colour of the insect is a light brown ; the thighs 

 of the first pair of legs longitudinally streaked with black ; 

 thorax and sides beneath whitish silvery down. 



Length of the insect from the base of the snout to the end of the 

 tail eleven lines. 



. .-. Some 



