S. Mahunka szerk.: Folia Entomologica Hungarica 31/2. (Budapest, 1978)

Table 2. Summary of literature data on the diet of Corixids given together with the description of experiments and the circumstances Author Date Herbivores Omnivores Carnivores Hungerford 1919 Corixidae Ekblom X Corixa sahlbergi Keunen XX Sigara sp. Walton 1943 Corixa lateralis Cymatia bonsdorfi Cymatia coleoptrata Lindberg 1944 Sigara carinata Sigara producta (First and second instar larvae herbivore) Szabó 1950 Corixa hyeroglyphica Corixa falleni Sutton 1951 Corixa punctata, C. panzeri, Sigara striata, S. falleni, S. distincta, S. semistriata Benwitz 1956 Corixidae James 1966 Callicorixa audeni Putschkova 1969 Sigara striata (With predominance of phytophagy) Jansson 1969 Several Corixid species, except Hesperocorixa specie; JanssonScudder 1972 Sigara alternata, Cymatia and Glaenocorisa species KoslucherMinshall 1973 Sigara sp. RESULTS No difference has been found (P=0.0 5) between the composition of the food of striata and falleni (Table 3). The main component was at both species animal body fluid occurring in each specimen. Definitely less but not negligible was the quantity of algae in the gut (

striata 4. 5%, falleni 10. 25%) with a rather high frequency in falleni (70% of the specimens). A great variety of alga species was discovered here and during the following dissections. Both the X after WEBER 1930; XX

after SZABO 1950.