Boros István (szerk.): A Magyar Természettudományi Múzeum évkönyve 51. (Budapest 1959)
Kovács, L. ; Gozmány, L.: Data to the quantitative relations of the Lepidoptera of the Alderwood Marshes in Ócsa, Hungary
exaggeration to try and establish a grade of constancy by the survey results of the two lamps. It is indisputable that the number of individuals, and especially that of species of Lepidoptera collected by lamps in quantitative surveys is exceedingly high, and the more so if we compare it with the results gained in other insect groups. This is caused partly by the high species number of the order of Lepidoptera, and partly by the fact that there are many among the species which more or less adapted themselves to different oecological conditions. The distribution, by the way, of the numbers of specimens among the several species has a rather wide latitude, from 1 to 2,146. An overpowering part of the species was represented by a low individual number, being therefore accidental species. The low individual number may be explained by various circumstances. So, for instance, the main season of some of the species was already over before the commencement of the surveys, or it began only afterwards. Other species had but moderately adapted themselves to alderwood marshes, indeed, they may have arrived there from other plant associations. There are evidently species among those with a low individual number which shun artificial light. Let us illustrate the distribution of the individual numbers by some data. 142 species were represented by a single specimen only, and another 151 species by 2—5 specimens ; all together almost 2 / 3 of the total of captured species. Contrarily, the number of species whose individual numbers reached 100 is Tabïe II. Species over 1°,., according to their d values Serial 1 Number of d number Species individuals values 1 Pelosia muscerda 2,146 16,1 2 i Eilema griseola 904 6,8 3 Haritala ruralis 683 5,1 4 Deilinea pusaria 435 3,3 5 Epirrhoë alternata 420 3,2 6 Ectropis bistortata 377 2,8 7 Xantorrhoë ferrugata 296 2,2 8 Hypena proboscidalis 266 2,0 9 Eupithecia assimilata 251 1,9 10 Aelhalura punclulata 249 1,9 11 Argyroploce lacunana 235 1,8 12 Ocrisia nubilalis 227 1,7 13 Sterrha dimidiata 221 1,7 14 Ethmia funerella 213 1,6 15 Perizoma lugdunaria 212 1,6 16 Serracn punctinalis 210 1,6 17 Sterrha biselata 202 1,5 18 Etiella zinckeneda 200 1,5 19 Calothysanis amataria 197 1,5 20 Clepsis semialbana 189 1,4 21 Phyludoria potatoria 182 1,4 22 Adoxophyes reticulana 167 1,3 23 Porihesia similis 139 1,0 24 Ar chips podarta 137 1,0
