La abeja de la miel y los abejorros (Bombus, Xylocopa), polinizadores potenciales de doce especies de Compositae en los cardales del macizo Cazorla-Segura (Jaén, SE Península Ibérica) (Insecta, Hymenoptera, Apidae)

Resumen Se aportan datos sobre Apis mellifera (Linnaeus, 1758), Bombus lapidarius (Linnaeus, 1758), Bombus maxillosus Klug, 1817; Bombus pascuorum (Scopoli, 1763), Bombus pratorum (Linnaeus, 1761), Bombus ruderatus (Fabricius, 1775), Bombus sylvestris (Lepeletier, 1832); Bombus terrestris (Linnaeus, 1758), Bombus vestalis (Geoffroy, 1785), Xylocopa cantabrita Lepeletier,1841; Xylocopa iris (Christ, 1791), Xylocopa valga Gerstäcker, 1872 y Xylocopa violacea (Linnaeus, 1758) como polinizadores potenciales y visitantes florales de Carduus bourgeanus Boiss. & Reut. subsp. bourgeanus, C. platypus Lange subsp. granatensis (Willk.) Nyman, Carduus pycnocephalus L., C. tenuiflorus Curtis, Carlina hispanica Lam., Carthamus lanatus L., Cirsium odontolepis Boiss., Notobasis syriaca (L.) Cass., Onopordum acaulon L., O. nervosum Boiss., Scolymus hispanicus L. y Silybum marianum (L.) Graetn. (Compositae) en el macizo Cazorla-Segura (Jaén, SE Península Ibérica). Abstract Data about the Apis mellifera (Linnaeus, 1758) , Bombus lapidarius (Linnaeus, 1758), Bombus maxillosus Klug, 1817; Bombus pascuorum (Scopoli, 1763), Bombus pratorum (Linnaeus, 1761), Bombus ruderatus (Fabricius, 1775), Bombus sylvestris (Lepeletier, 1832); Bombus terrestris (Linnaeus, 1758), Bombus vestalis (Geoffroy, 1785), Xylocopa cantabrita Lepeletier,1841; Xylocopa iris (Christ, 1791), Xylocopa valga Gerstöcker, 1872 y Xylocopa violacea (Linnaeus, 1758) as potencial pollinators and visitors of the Carduus bourgeanus Boiss. & Reut. subsp. bourgeanus, C. platypus Lange subsp. granatensis (Willk.) Nyman, Carduus pycnocephalus L., C. tenuiflorus Curtis, Carlina hispanica Lam., Carthamus lanatus L., Cirsium odontolepis Boiss. ex DC., Notobasis syriaca (L.) Cass., Onopordum acaulon L., O. nervosum Boiss., Scolymus hispanicus L. y Silybum marianum (L.) Graetn. (Compositae) in Cazorla-Segura mountains (Jaén, SE Iberian Peninsula) are presented.

DIVERSITÉ ET ACTIVITÉ DE BUTINAGE DES ABEILLES (HYMENOPTERA APOIDEA) DANS UNE PELOUSE À THÉROPHYTES DE CONSTANTINE (ALGÉRIE)

The study of bee diversity and activity was conducted from January until June 1994 in a natural vegetation parcel (6200 m2) in Constantine (Algeria). The results showed the presence of 10 genera of wild bees visiting natural flowers and belonging to four families: Andrenidae, Anthophoridae, Halictidae, and Megachilidae. The Apidae family was represented by honeybee (Apis mellifera L.) and bumblebee (Bombus ruderatus siculus Dalla Torre et Friese). Census of bee populations revealed the abundance of wild bees with 66.26% of flowers visits, honeybee with 31.98%, B. ruderatus and Xylocopa violacea with 1.59 and 0.17% of total fauna, respectively. The beginning flight activity of these species started from a minimum threshold of temperature and humidity. The alimentary specialization was quantified by Simpson’s diversity index (Is) and by Shannon’s diversity index (Ish). Apis mellifera had the highest floral visits index (Is = 0.866) and the broadest alimentary niche index (Ish = 0.316).

BROOD BIONOMICS OF BOMBUS RUDERATUS IN NEW ZEALAND (HYMENOPTERA: APIDAE)

Observations of five free foraging colonies of Bombus (Megabombus) ruderatus (Fab.) are reported with respect to brood production and mortality. Emphasis is given to the nutrition of larvae and new adults, and larval ejection. Seasonal trends in the sex, caste, and size of adults are reported. Colony size was relatively large for a temperate Bombus species. Intraspecific variation in colony size was related to the timing of male production.