NOTONECTIDjE. 329 



angles, whilst in typical deyrollei the lateral pronotal margins are 

 more regularly arched ; he also relies on other minor measure- 

 ments, his measurements of the whole body do not, however, hold 

 good. 



Length 58-73 millim. 



Hob. Assam ; Brahmaputra Eiver (Lefroy). Japan. Corea. 



Two specimens of this species were sent to me by Mr. Maxwell- 

 Lefroy, taken at light on the Brahmaputra, where alone it has 

 apparently yet been found in India. Mr. Lefroy writes : " It is 

 found at light and requires to be handled with very great care as 

 its puncture is poisoned and painful " (' Indian Insect Life,' 

 p. 714). These remarks also exactly apply to my experience of 

 B. niloticum in the Transvaal. 



Family NOTONECTID.E. (Vol. Ill, p. 40.) 



Considerable additions are now made to this Family, so far as 

 the Indian fauna is concerned. Two more genera are included 

 Nychia, Stal, and HelotrepTies, St&l. Three species are added to 

 Enithares, two to Anises, and two to Plea. 



Subfamily NOTONECTINJE. (Vol. Ill, p. 40.) 



Genus ENITHARES. (Vol. Ill, p. 42.) 

 3105. Enithares paivana, sp. n. 



Head (including eyes) and pronotum milky white, the foveately 

 excavate anterior angles of the pronotum more or less black ; 

 scutellum black, its lateral margins milky white, broadest at base 

 and containing at the basal angles an angulate brownish spot, the 

 apex black ; hemelytra milky white, apex of the clavus, about 

 apical third of corium, and the membrane shining black ; body 

 beneath and legs pale greyish brown, a spot at apices of anterior 

 and intermediate tibiae, the tarsal claws, and a longitudinal line on 

 the inner surfaces of the posterior legs, black; head with the 

 vertex longer than its greatest breadth at apex, a little longer than 

 the pronotum, its lateral margins sinuate and attenuate towards 

 base, breadth at apex subequal to that of eye at base ; pronotum 

 more than twice as broad between humeral angles than the medial 

 length ; scutellum considerably broader at base than long ; corium 



