N. 52: Angel Solís & Bert Kohlmann

G. it. Ent., 11 (52): 1-73

December 2004

El género Canthidium (Coleoptera: Scarabaeidae)

en Costa Rica

por

ANGEL SOLÍS y BERT KOHLMANN

Abstract - The genus Canthidium (Coleoptera: Scarabaeidae) in Costa Rica - This paper is the result of the study of the genus Canthidium Erichson (Coleoptera: Scarabaeidae) in Costa Rica. Twenty-four species are reported, six of them are new. The known species are: C. angusticeps Bates, C. ardens Bates, C. aurifex Bates, C. centrale Boucomont, C. discopygidiale Howden & Young, C. guanacaste Howden & Gill, C. haroldi de Borre, C. hespenheidei Howden & Young, C. laetum Harold, C. leucopterum Howden & Young, C. macroculare Howden & Gill, C. pallidoalatum Howden & Young, C. perceptibile Howden & Young, C. planovultum Howden & Young, C. tenebrosum Howden & Young, C. tuberifrons Howden & Young, C. variolosum Howden & Young and C. vespertinum Howden & Young. The new species are: C. annagabrielae, C. emoryi, C. marianelae, C. marielae, C. priscillae and C. pseudopuncticolle. The following synonymy is established: C. centrale Boucomont, 1928 = C. martinezi (Edmonds & Halffter, 1978), Photographs of the dorsal aspect of all the species are included, as well as their line drawings of important morphological characteristics and distribution maps. Drawings of the dorsal habitus for the new and interesting species are also included. An identification key is presented.

N. 52: Saber Sadeghi & E. Gentili

G. it. Ent., 11 (52): 75-77

December 2004

Laccobius (Dimorpholaccobius) torbaticus, new species from Iran

(Coleoptera, Hydrophilidae)

by

SABER SADEGHI & ELIO GENTILI

Abstract - Lacobius torbaticus, new species of Hydrophilidae, is described from Iran. Notes are supplied on specific characters and differences from similar species.

N. 52: P. Rosa

G. it. Ent., 11 (52): 79-90

December 2004

Alcune osservazioni sulle relazioni tra Vegetazione

e Crisidi (Hymenoptera, Chrysididae) in Italia

di

PAOLO ROSA

Abstract - Some observations on the relations between Vegetation and Chrysidid Wasps in Italy (Hymenoptera, Chrysididae) - Some new records of plants visited by chrysidid wasps in Italy (with the exception of Daucus carota L. and Achillea millefolium L.) are listed. Some species of Umbelliferae [Laserpitium gallicum L., Heracleum mantegazzianum Sommier et Levrier, Imperatoria verticillaris (L.) DC.] attract successfully many chrysidid species. Other interesting observations on the plants visited by chrysidid wasps in the mountains, as well as their feeding on pine resins and on the substances exuded by opening chestnut shells are presented.

N. 52: S. Vicidomini

G. it. Ent., 11 (52): 91-98

December 2004

Biologia di Xylocopa (Xylocopa) violacea (Linneo, 1758)

(Hymenoptera: Apidae):

foraggiamento su Vicia faba L. (Leguminosae: Vicieae)

di

SALVATORE VICIDOMINI

Abstract - Biology of Xylocopa (Xylocopa) violacea (Linnaeus, 1758) (Hymenoptera: Apidae): foraging behaviour on Vicia faba L. (Leguminosae: Vicieae) - The aim of this contribution is to study the foraging ethology of Xylocopa violacea on Vicia faba. Two foraging tactics have been observed: from the corolla, with flower pollination (3.4% of flowers), and nectar robbery, without flower pollination and damage to the flower (96.6%). Female visit less flowers/min. than males and spend longer time on a flower than males; males visit a double number of flowers/min. in January than in March; they spend longer time on a flower in March than in January and more s/min. (+48%) in flight in March than in January. These data come from the male mating behaviour in this area: the random search for females in flight on V. faba in February-April. A number of advantages come from the robbery tactic, among them, a higher number of flowers/min. visited than with the corolla tactic, as recorded for Lamium purpureum. The robbery tactic among the Xylocopini is probably so widespread for the following hypothesis: the nectar robbery tactic, with or without pollination, allows a higher number of flowers visited per min. than the corolla tactic, with increased energetic reward. X. violacea is a very inefficient pollinator of V. faba. Other V. faba visitors are: Macroglossum stellatarum and Pieris brassicae (Lepidoptera), Epicometis hirta and Oxythyrea funesta (Coleoptera), Anthophora acervorum, Apis mellifera, Bombus terrestris, Eucera longicornis, Xylocopa iris and 3 other undetermined species of Apidae. Other plant species on which X. violacea uses the robbery tactic are: Antirrhinum majus, Canna indica, Cordia mixa, Linaria vulgaris, Mirabilis jalapa, Symphytum tuberosum, Trapeolum lobbianum, Salvia eriocalyx, S. menthaefolia, S. mexicana, Saponaria officinalis, Petunia hybrida, Corydalis sp., Fumaria sp., Jasminum nudiflorum, Lonicera etrusca, Petrocoptis grandiflora, Narcissus cantabricus, N. tazetta, Vicia sativa. It is supposed that X. violacea feeds also on the pollen of V. faba.

N. 52: S. Vicidomini

G. it. Ent., 11 (52): 99-101

December 2004

Sistematica e distribuzione degli Xylocopini

(Hymenoptera: Apidae: Xylocopinae): nuove e rare segnalazioni

di

SALVATORE VICIDOMINI

Abstract - Systematics and distribution of the Xylocopini (Hymenoptera: Apidae: Xylocopinae): new and rare records - New faunistic records are reported for some Xylocopini (Apidae): Xylocopa caffra (L.), extra range record: Eat Indies; X. latipes (Drury), first record (historical: 1876) from Australia (Cape York); X. sulcatipes Maa, first record from Jordan (Qa Disi); X. torrida (Westwood), wrong extra-range record: India (Sikkim); X. violacea (L.), confirmed presence in China.

N. 52: S. Vicidomini

G. it. Ent., 11 (52): 103-104

December 2004

Xylocopa (Xylocopa) violacea (Linneo, 1758)

(Hymenoptera: Apidae):

descrizione delle antenne della pupa

di

SALVATORE VICIDOMINI

Abstract - Xylocopa (Xylocopa) violacea (Linnaeus, 1758) (Hymenoptera: Apidae): description of the antennae of the pupa - The description of the antennae of the pupa of Xylocopa violacea (L.) (Apidae: Xylocopini) is the aim of this note. Main results are as follows: a) the ventral side of pupal antennal flagellomeres is carinate; b) only adult males of Lestis species show this character among the Xylocopini; c) Lestis should be probably included in Xylocopa, as ancestral group of this.

N. 52: S. Vicidomini, M. Impembo, G. Fasanaro

G. it. Ent., 11 (52): 105-107

December 2004

Biologia di Xylocopa (Xylocopa) violacea (Linneo, 1758)

(Hymenoptera: Apidae):

analisi quantitativa dei carboidrati contenuti nella pasta pollinica

di

SALVATORE VICIDOMINI, MARIO IMPEMBO, GAETANO FASANARO

Abstract - Biology of Xylocopa (Xylocopa) violacea (Linnaeus, 1758) (Hymenoptera: Apidae): quantitative analysis of carbohydrates contained by the pollen paste - To determine the quantitative pattern of carbohydrates contained by the pollen paste of Xylocopa violacea (L.) (Hymenoptera: Apidae) in southern Italy is the aim of this note. The identified carbohydrates are as follows (fresh weight %): monosaccharides (fructose 23.70%; glucose 20.45%); disaccharides (saccharose 0.74%); tetrasaccharides (stachiose = lupeose 1.50%).