Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 63. (Budapest 1971)

Kovács, L.: Data to the knowledge of Hungarian Macrolepidoptera VI. Data with respect to migrating and spreading species

2. Spodoptera exigua HBN. Light trap data The species is observable, except for the northern mountainous range, everywhere in the country. Whereas, however, M. vitellina is regularly captured by the light traps operating in the eastern part of Hungary, exigua derives chiefly from traps placed in the Transdanubia and between the Danube and the Tisza (in this area, 31 of the 39 light traps yielded exemplars of the species). In the Trans-Tisza Region only 5 out of 8, and in the Northern Central Range merely 3 out of also 8, light traps collected it. The great majority of specimens found in the material of the light traps originate from the Transdanubia, and mainly from the southern and central parts. Of the 274 specimens captured until the end of 1970, 89 fall on the southeastern and 79 on the western parts of the Transdanubia. They are followed by the 54 exemplars deriving from between the Danube and the Tisza, then the northeastern part of the Transdanubia with 28, the Trans-Tisza Region with 18, and the Northern Central Range with 6, specimens (Table 2; Map 4). If the annual mean of the individual numbers per light trap is plotted on a map, the south-southwestern preponderance of the species becomes even more conspicuous (Map 5). The frequency of occurrence is strikingly expressed by the mean per light trap in the several reasearch regions. This is 11 in the southeastern part of the Transdanubia, and 9 each in the western part and between the Danube and the Tisza: values rather corresponding to one another. In the northeastern part of the Transdanubia and in the Trans-Tisza Region the mean per one trap is 3.5 for each regional unit, and no more than 2 for the Northern Central Range. Map 4. Spodoptera exigua HBN. — Individual numbers per light trap