著者

安松 京三

出版者

社団法人日本動物学会

雑誌

動物学雑誌 (ISSN:00445118)

巻号頁・発行日

vol.50, no.7, pp.358-361, 1938-07-15

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On April 19th of this year, while working at the Hikosan Biological Laboratory, I happened to collect a peculiar bee, which may be referable to Andrena vitiosa SMITH, hitherto known only from North China. As the original description of the species is quite incomplete, the following detailed redescription may be of value. Andrena vitiosa SMITH Andrena vitiosa SMITH. Descrip. New Spec. Hym. Brit. Mus., p. 51, ♂, 1879. Anthrena vitiosa DALLA TORRE, Cat. Hym., vol. 10, p. 161, 1896. "Male. Length 41/2 lines. Black. Head twice the width of the thorax, deeply emarginate behind; the clypeus yellow; the face and vertex finely punetured, the former with a thin pale fulvous pubescence; the cheeks smooth and shining. Thorax thinly covered above with pale fulvous pubescence, that on the metathorax thin and hoary; the collar produced laterally into an elevated tubercle; wings fulvo-hyaline, the tegulae testaceous, the nervures ferruginous; the legs rufo-piceous, the tarsi palest. Abdomen smooth, shining, and very finely punctured; the apical margins of the segments obscurely rufo-testaceous. "Hab. North China" (After SMITH, 1879). ♂. Black. Head and adbomen very shining. Clypeus pale yellow. Apical segments of antennae very faintly reddish-black. Tegulae, tibial spurs and tarsi of all legs pale brownish. Apical half of claws blackish-brown. Posterior margin of each abdominal segment pale. Wings transparent, slightly smoky, with the outer margin darkened. Nervure C pale brownish, other nervures and stigmas brownish-black. Hairs greyish-white. Hairs on front (between the insertions of antennae), thorax, sixth abdominal tergite and on legs very dense and long. Hairs on clypeus, vertex and occiput long, but not so dense as on thorax. Hairs on abdominal tergites rather short and not so dense as on thorax. Temples almost hairless and very much shining. Front with very minute, longitudinal striae. Clypeus with indistinct, minute and coarse punctures. Thorax (except mesonotum and scutellum) and propodeum mat. Abdomen almost impunctate. Head, seen from above, very large, wide, slightly less than twice the width of thorax. Temples very much developed and prolonged posteriorly. Head, seen in profile, with temples about triangular in outline, its maximum length is very slightly shorter than the longitudinal axis of an eye, moderately swollen. Malar space very broad and almost as wide as long. Head, seen in front, somewhat square in outline, slightly wider than long, with the inner orbits very slightly curved, but not convergent below and almost parallel to each other, slightly divergent above only at the uppermost portion. Eyes very narrow, length : width=32 : 11. Front almost flat, slightly excavated at the insertions of antennae. Ocelli put in a very flattened triangle or put in an arc. Postocellar line very much shorter than oculo-ocellar line (nearly 1:2), postocellar line slightly longer than the distance between posterior ocelli and the posterior margin of vertex. Clypeus very slightly convex, triangular in outline, about as long as wide. Anterior margin of clypeus and front almost straight. Mandibles very long and stout, moderately curved, with the apex acutely pointed; slightly longer than eye, without dens, antennae long; scape longer than clypeus; third segment longer than fourth, about twice as long as wide at the apex, distinctly shorter than fourth and fifth. Apical segment of antennae strikingly curved. Thorax, seen from above, as wide as third abdominal segment. Pronotum well developed, long, about three-fourths the length of mesonotum and about twice as long as scutellum, oblique and flat above, its postero-lateral angles very prominently tuberculated. Abdomen long and slender, basal segment longer than wide, second less than twice as broad as long. Posterior margin of fourth and fifth sternites very faintly sinuate at the middle. Sixth sternite very deeply and triangularly emarginate at the middle. Measurements Length: Head seen fro