Fourty two grass species, mostly weeds, found within about 70 heactares of the Peradeniya University Park, were examined for aphids.Eight species of aphids were recorded from 21 grass species in the study area. Two of the aphid species collected, Hysteroneura setariae (Thomas) and Rhopalosiphum Padi (L.) had not bee previously recorded from Sri Lanka.
A list is given of 17 species of aphids with their host plants (52 plant species in 29 familes) from Peradeniya campus, located in the Central Province of Sri Lanka. Nine of the aphid species had not been previously recorded from Sri Lanka. Of them, Sitobion wikstroemiae (Mamet) has been recorded only from Mauritius and East Africa and Uroleucon minutus van der Goot is considered a rare species. Two of the aphid hyperparasitoids collected. Syrphophagus hofferi (Hayat) and Coagerus boucaki Noyes and Hayat are without previous host records
