PEIilTTOPUS. 



175 



Genus PERITTOPUS. 



Perittopiis, Fieler, Eur. Hem. p. 33 (1801); Kirk. Entomologist, 

 1901, p. 286. 



Type, P. breddini, Kirk., a Javan species. 



Distribution. Oriental Eegion. 



Ajjterous form. Subovate ; rostrum and antennse short and 

 stout ; pronotuni with a narrow anterior coUar ; anterior tarsi 

 apparently, single-jointed (two minute basal nodes or joints); 

 intermediate and posterior tarsi distinctly three-jointed ; claws 

 inserted posterior to the apex, in a single cleft ; connexivum well 

 developed, broad. 



961. Perittopus rufus. 



Perittopus rufus, Fieb. (iued.) ? 



Apterous form. Bright reddish-ochraceous ; abdomen above a 

 little darker ; coxae and legs luteous ; antennae, apices of the 

 intermediate and posterior femora, bases 

 and apices of all the tibiae more or less 

 fuscous ; eyes piceous ; ocelli obscure, 

 situate near eyes ; basal joint of antennae 

 incrassate, almost equal in length to 

 second and third joints, fourth fusiform, 

 slightly longest ; rostrum just passing 



/^;^5?'f X >i anterior coxae, its apex black ; pronotum 



I Ila, _. ' \ sparingly coarsely punctate, with a 



distinct transverse impression on anterior 

 area ; antennae, lateral margins of pro- 

 notum and abdomen, apices of femora 

 and the tibiae hirsute. 

 Length 24 millim. 

 Hab. Teuasserim (Coll. Dist.). 8iam~ese Malay States (Annandale 

 di' Hobinson). 



Fig. 128. — I'eritto'p'Us rufus. 



Subfamily IV. GERRINtE. 



As previously defined (p. 168). in this subfamily of the Hydro- 

 metridae the posterior femora are long and slender, extending far 

 beyond the abdominal apex. 



These are all aquatic insects, and their anatomy, especially the 

 structure and segments of tlie sternum, has been much misunder- 

 stood. It is not the province of these volumes to enter ex- 

 haustively on this subject, but Bergroth (Ent. Month. Mag. 1902, 

 p. 258) has cleared up several misconceptions of previous writers. 



The Gerrina' have been subdivided by Bianchi into two divisions 

 or, as he proposes, subfamilies ; and although Champion considers 

 the characters too unsatisfactory to be used, we do not accept 

 that view, at least so far as this fauna is concerned, and we foUow 

 Bianchi's arrangement. 



