Records of Hie IncUnn Mvseum. 



[Vol. XV, 



cyanophlyctis, Avhicli breeds there, the 011I3' molluscs are Planorhis 

 exustus, which is abundant, and Limnaea ovalis, which is scarce. A few 

 Chironomid and Culicid larvae occur, and a water-mite, parasitic in its 

 younger stages on Ranatra, is common. In the latter part of the " rains " 

 the rocks near the edge become covered with a sponge {SyotnjiUa alhay 

 and a Polyzoon {Plumatella longigem.mis).^ 



The collections on which these notes are based were made on seven 

 different visits to the island, some of which lasted for a week or more, 

 between 1914 and 1917. They were obtained by different members 

 of the Zoological Section of the Indian Museum, now the Zoological 

 Survey of India. The most lengthy of our visits, which took place at all 

 seasons, were made in July and the first week of August, that is to say, 

 in the earlier part of the " rains," which is thus the season best represented 

 in the collection ; but there is comparatively little seasonal variation 

 in the insect life of the island, the climate of which, for purely local 

 reasons, is more uniform than that of most places in Peninsular India. 



I have added certain ecological notes to Mr. Paiva's manuscript. 

 They are enclosed in parentheses. 



N. ANNANDALE, 

 Director, Zoological Survey of India. 



List of Species. 



Fam. Pentatoniidae. 



Coptosoma indicum, Dist. 



Macroscytus subaeneus (Dall.) 



Cydnus varians, Fabr. 



Eynjiysiirus jolini (Oshan.) 

 Fam. Coreidae. 



Pefalocnemis obscura (Dall.) 



Homoeocerus albiguttuhts, Stal. 



Pendulinus antennatus (Kiiby). 



Eusthetus insularis, sp. nov. 

 Fam. Lygaeidae. 



Aspilocoryphvs guttiger (Dall.). 



Dieuches femoralis, Dohin. 



Nysius ceylanicus (Motsch ) 

 Fam. Pyrrhocoridae. 



Sea ntiii s forsferi ( Fa br. ) 

 Fam. Hydrometridae. 



Mesovelia rmtlsanti, Buch. White. 



Microvelia dilufa, Dist. 



Gerris tristan. Kirk. 

 Fam. Reduviidae. 



Bagauda splendens, Dist. 



Petalochirus burmanus, Dist. 



Acanthaspis fulvipes (Dall.) 



Ecfoniocoris cordiger, Stal. 



Harpactor marginahts {Fahr. ) 



Harpactor squalus, Dist. 



Harpactor fuscipes ( Fab?-. ) 



Harpactor varians, sp. nov. 



Sycanus collaris (Fabr.) 

 Fam. Nepidae. 



LaccotrepJies grisexis (Gucr.) 



Ranatra ? filiformis, Fabr. 

 Fam. Belostomatidae. 



Sphaerodema molestvni (Diif.) 

 Fam. Notonectidae. 



Anisops sardea, Herr.-vScliaff. 



Anisops niveus (Fabr.) 



Plea pallescens, Dist. 

 Fam. Corixidae. 



Mieronecta dione, Dist. 



Fam. Cicadidae. 



Terjmosia jenltinsi, Distant, var 

 Fam. Fulgoridae. 



Dichopitera hyalinata (Fabr.) 

 Fam. Membracidae. 



Leptocentrus substitutus (Walk.) 



Coccosterphus minutus (Fabr.) 

 Fam. Jassidae. 



Thomsoniella porrecta (Walk.) 



Eutettix phycitis, Dist. 



1 See Annandale, Mem. Ind. Mus. V, p. 25 (1915). 



8 See Annandale, Bee. Ind. Mus. XI, pp. 166, 168 (1915). 



