O. Merkl szerk.: Folia Entomologica Hungarica 69. (Budapest, 2008)

(CSONTOS 1986). Natural forest habitats in Central Europe have few persistent neophytes, nevertheless Impatiens parviflora about 150 years after its introduction has become naturalised and dispersed in Europe. Its Hungarian distribution expanded in Western Transdanubia, Transdanubian and North Hungarian Mountains, also along the major rivers. MATERIALS AND METHODS In 2006 and 2007 aphid infestation of small balsam (Impatiens parviflora) was investigated in Sopron (Győr-Moson-Sopron county, Western Transdanubia close to the Austrian border), in Budapest and in the Pilis Mountains (Pest county, 30 kilometres north-west of Budapest). In Sopron, in Budapest, and in the Pilis Mountains a botanical garden, roadside vegetation, and deciduous forest were the habitats of Impatiens parviflora, respectively. On 27 June and 13 July 2007, during the visual plant examination, the aphids found on small balsam were put into vials containing 70% ethyl alcohol. In laboratory after boiling the aphids for a few minutes in ethyl alcohol they were put in 10% potassium hydroxide. The animals' bodies were cleaned by boiling them again in it and by pressing them to the necessary extent. Having rinsed the animals with distilled water, they were mounted in Hoyer's medium containing sorbitol. The microscope-slide preparations were dried in an incubator at 30°C and then sealed with commercial nail varnish (UPTON 1991). Aphids were studied with phase contrast microscope. In order to identify the aphid species, wotks by BLACKMAN & EASTOP (2006), and also HEIE (1994, 1995) were used. Classification, species and generic names of aphids were used according to the catalogue of REMAUDIERE & REMAUDIERE (1997). RESULTS Aphids were collected only in Sopron. Two aphid species were found on Impatiens parviflora. The first one is Impatientinum (Impatientinum) asiaticum NEVSKY, 1929 (Aphidinae: Macrosiphini). It is a new species for the Hungarian fauna and the first representative of that genus. The second species is Aphis fabae SCOPOLI, 1763 (Aphidinae: Aphidini). Apterae, alatae and immatures of I. asiaticum were found on flower peduncles and on the underside of the leaves of small balsam. It is probably of Central Asian (Tien Shan) origin, and was introduced into Europe around 1967. Now it is widely distributed in Europe, e.g. Czech Republic, Poland, Russia, Britain, Germany, Denmark, Sweden and Finland (HEIE 1994). The species