Natural history of facultative social taxa is important for understanding the evolution Eusociality. However, data status many species are missing. Social seven European Ceratina bees was studied in Cyprus. Multifemale nests were found five three different subgenera: C. (Euceratina) mandibularis, (E.) cypriaca, chrysomalla, (Dalyatina) parvula and (Neoceratina) bispinosa. No dallatoreana (N.) s...

1. If a compact Lie group P acts on a completely regular topological space E then E is said to be a principal P-bundle if whenever the relation px — x holds for pÇzP, x£E it follows that p = e, the identity of P. The orbit space X = E/P is called the base space and the map tt: E—>X carrying y into its orbit P-y is called the projection. Suppose now that G is a Lie group, 77i a closed subgroup o...

a tiling of a surface is a decomposition of the surface into pieces, i.e. tiles, which cover it without gaps or overlaps. in this paper some special polygonal tiling of sphere, ellipsoid, cylinder, and torus as the most abundant shapes of fullerenes are investigated.

Behavioural differences across prey-capture and processing mechanisms may be governed by coupled or uncoupled feeding systems. Osteoglossomorph and salmonid fishes process prey in a convergently evolved tongue-bite apparatus (TBA), which is musculoskeletally coupled with the primary oral jaws. Altered muscle-activity patterns (MAPs) in these coupled jaw systems could be associated with the inde...

Epeolus, Coelioxys, Cephalic Secretions, Pyrazines, Spiroacetals Volatile cephalic secretions from females of four cleptoparasitic bee species, Epeolus cruciger (Pz.), E. variegatus, (L.) (Anthophoridae) and Coelioxys (Coelioxys) quadridentata (L.), C. (Schizocoelioxys) mandibularis Nyl. (Megachilidae) were analysed by combined gas chromatog­ raphy/mass spectroscopy. There are considerable simi...

The fossil record of stag beetles (Lucanidae), especially in Mesozoic amber, is sparse. Four additional lucanids preserved mid-Cretaceous Kachin amber from northern Myanmar are here reported. All these species included the primitive subfamily Aesalinae, and have been identified as: Protonicagus mandibularis sp. nov. (tribe Nicagini); Cretognathus minutissimus gen. et Ceratognathini); Ceratognat...