Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 67. (Budapest 1975)

Sakagami, Sh. F.: Some bumblebees from Korea with remarks on the Japanese fauna (Hymenoptera, Apidae)

'"Bombus (Bombus) sporadicus czerskianus VOGT Bombus (Terrestribombus) terrestris var.• geogr. czerskianus VOGT, 1911, SB. Ges. Naturf. Fr. Berlin, p. 56. — Bombus (Terrestribombus) sporadicus Rasse czerskianus, KRÜGER 1956: 95. — Bombus sporadicus czerskianus, TKALCÛ 1967: 46. NE: No. 216, 9 ww. Hair colou r. Hairs of head, both short and long, rather dark brown without greyish brown tint as redescribed by TKALCÛ, suggesting individual variation. Shade of collaris, scutellaris and T

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—T

2 yellow ochre to yellow brown, the latter apparently indicating post mortem change, closely resembling some decoloured specimens of B. patagiatus lanchouensis VOGT (= B. vasilievi SKORIKOV, cf. TKALCÛ 1967). Collaris variable in width, from 2/3 to 1/3 of interalaris. Interalaris often with admixture of yellowish hairs along tegulae, in extreme case changing to an ill-defined centralis. T

} anteriolaterally with sparse black hairs only in two out of nine workers, T

2 posteriorly with sparse blackish brown hairs in two workers, T

4 posteriorly with sparse whitish hairs in all workers. Otherwise as described by TKALCÛ. Structurally the specimens well coincide with some Scandinavian specimens of B. s. sporadicus compared and with the redescription of TKALCÛ. Comparison of some metric characters among species Certain metric characters were taken in all the specimens examined. The distributions of measured values in some species represented by a reasonably large number of workers are given in Figs. 10-12, in order to show the differences among the species and the relation between various ratio sused in bumblebee taxonomy and body size variation. The body size of bumblebee females exhibits the variation range much ampler than in other insects due to its caste linked polymorphism. It is known that allometric trend is realized in such case more exaggeratedly than usual (WILSON 1953, SAKAGAMI & MOURE 1965). This must be borne Fig. 10. Distribution of ratios malar width/malar length (A) and lower/mid interorbital distance in females of five bumblebee species (B).