Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 60. (Budapest 1968)
Kovács, L.: Data to the knowledge of Hungarian Macrolepidoptera III. New taxa from the subfamily Hadeninae
a part of them feeds on the A. maritima plants dispersed in the neighbourhood, but another part of the individuals arrives there in the course of their wanderings, especially in years of gradation when an inclination to expansion can be observed also in other related species (mainly Mamestra pisi L.). In the vicinity of the other light-traps, conditions must surely be less favourable ; the primary breeding sites of the species must either be at greater distances from the traps, or the populations comprise but meagre individual numbers everywhere in the surrounding areas, owing to some unfavourable pedological or coenological conditions. Phenological data. The activity graph, (Graph 2) constructed on the basis of the data produced by the light-traps, reveals that also this species has two annual broods. w30 mo v.i$. vi.iz VIM va.ii tx.r Graph 2. Activity curve of Orthosia porosa kenderesensis ssp.n. (based on light trap data) The borderline of the two generations is around 6—7 June, not obliterated even by the summarization of the data of several years. The earliest observation refers to the last days of April, the last one to 7 September (both in 1961). During the period of the first brood, there is at least one daily observation between 14 May— 22 June, and similarly between 10 July —3 September for the second brood. By our sporadical data, the transitional period between the two generations is shorter than in the preceding species, comprising merely 17 days. Nor is the second generation predominating over the first one to the same degree as in the case of the preceding taxon. With respect to calendar days, the two generations are nearly equal in time, the first one flying for 56 days (average of ten years), the second for 58 days. However, if the repetition of observations falling on identical calendar days also be taken into account, the rate will discernibly shift to the advantage of the second brood (113: 163). The most favourable days for flight in the spring are between 16 May — 14 June, and in the summer 25 July— 8 August. The peak of flight is on 18 May, and 29, 31 July (main value 6). Though at a smaller rate, also the bulk of specimens appears in the period of the second generation, as the rate of the broods in this respect is 245: 699. For one day, most specimens were captured by the trap at Kenderes, 30 çf and 1 9 on 10 August, 1962. Winter conditions are less detrimental to this species than to the preceding one. Systematical considerations. Literature as well as the collections of the Hungarian Natural History Museum apply the same specific name to both the eastern form and the one inhabiting the Carpathian Basin. The description of the species and the available specimens indicate, however, that they represent two distinct, well delimitable forms.
