Two indices, Simple Resultant Index (R,) and Weighted Resultant Index ( R J , are proposed for enabling the analysis of stomach contents of fishes. The indices are based on percentage occurrence and percentage volume, as in the case of the Index of Preponderance. Possible graphical representation of the indices helps towards understanding the relative representation of the two contributing parameters. The weighted index is, in particular, a means of comparison, grading food items in the order of importance.

In a survey for oothecal parasites of cockroaches in India, 6 species of cockroaches were recorded. Of these Neostylopyga rhombifolia (STOLE.) was restricted to thatched huts while Blattella germanica (L.), Periplaneta americana (L.), P. australasiae (F.), P. brunnea BURMEISTER and Supella longipalpa (F.) were common in other types of buildings. Eight species of parasites, of which 4 are new records; were reared: Anastatus tenuipes BOLIVAR., Cornperia merceti COMPERE, Evania appendigaster (L.), Evania sp. near antennalis WESTW., Genus et sp. nov. near Anastams. Tetrastichus asthenogmus (WATERSTON), T. hagenowii (RATZEr~URG) and Tetrastichus sp. (miser group) which is hyperparasitie. The natural and experimental hosts of these parasites are discussed. The low levels of field parasitism suggest there is scope for introducing more promising parasite species into India for biological control of cockroaches.

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The species of flies breeding in bovine manure, their parasites and predators as well as other associated arthropods in 3 localities in and near Bangalore are recorded. The flies are Muaca domestiea L., Musca pattoni AUSTEN, Stomoxys calcitrans L., Physiphora aenea F., Physiphora demandata F., Sargus metallinus F., Sepsis thoracica R.-D., Sepsis nitens WIEDEMANN, Sphaerocera seabricula HAL. and Leptocera (Coproica) hirtula RONDANI. Four species of hymenopterous pupal parasites of these flies have been obtained: Spalangia camerani PERKINS from pupae of M. domestica, M. pattoni, S. calcitrans, P. aenea and P. demandata; Spalangia endius WALKER from pupae of M. domestiea, M. pattoni and S. calcitrans; Spalangia nigroaenea CURTIS from pupae of M. domestica and S. calcitrans;and Dirhinus trichiophthalmus MASX from pupae of Sargus metallinus F. Percentage parasitism of fly puparia in field samples was noted. Four species of Hister and Aleochara puberula KLU6 feeding on various immature stages of M. domestica, 2 species of scarabaeid beetles, 2 species of ants and a pseudoscorpion were also found in the manure. The importance of biotic regulatory factors in the control of flies is discussed.A continuing survey for natural enemies of house fly and other related flies in and near Bangalore began in March, 1975 under a research grant from the Indian Council of Medical Research. This paper summarises the preliminary work in so far as it relates to flies breeding in bovine manure.