1909.] H. Maxwell-Lefroy : Insects of Tirhut. 337 



201. A nisops fieberi, Kirk. 



Pusa. — All months. 



Kirkaldy says "Distributed over British India," on whose 

 authority is not stated. Distant records Ceylon and Celebes. 



202. Anisops niveus, Fabr. 



Pusa. — All months. 



The Fauna records Bomba}-, Burma, and " suggests " all India. 



203. Plea pallescens, Dist. 



Pusa. x-08 — ix-08 — vii-09. 

 Recorded from Calcutta. 



CORIXID^. 



204. Corixa hieroglyphica, Duf. 



Pusa. — All months. 



Recorded from Assam, N. Bengal, Bombay. 



205. Micronecta striata, Fabr. 



Pusa. — All months. 



The Fauna records Calcutta, Kanara, Ceylon. 



The aquatic Rhynchota have probably been little collected in 

 India, and one would expect them to be widely spread, since 

 neither heat nor drought would affect them in big rivers such as 

 come down from sub-tropical areas. Still there are puzzles, not- 

 ably Belostoma deyrollei from the Brahmaputra not being found in 

 the Ganges. A feature, too, is the complete absence of Mononyx, 

 so common in the hills, and of Naucoridge. The former is a land 

 insect typical of sub-tropical areas and the Naucoridse apparently 

 also are not plains' insects at all. 



We have now enumerated 205 species of Rhynchota Heterop- 

 tera from Tirhut, mainly from one locality, Pusa, in which collect- 

 ing has been done continuously by many students and others, as 

 well as myself, for five years. We have probably found at least 

 every common species ; there may be another 100 rare species not 

 listed, which are not identified or are new. The fauna as a whole 

 is markedly Malayan and Burmese, very markedly distinct from 

 that of the nearest sub- tropical zone, Sub-Himalaya, West. It con- 

 tains also very few species stretching across the drier north-west, 

 but probably many species common also to the hills of Chota 

 Nagpur and other places to the south-west. How it will compare 

 with the fauna of Central India, East, is uncertain, but we believe 



