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Perdita placida Timberlake, 1958
Life   Insecta   Hymenoptera   Apoidea   Andrenidae   Perdita
Subgenus: Perdita


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Identification
Extracted from: TImberlake P. H., (1958). A Revisional Study of The Bees of the Genus Perdita F. Smith, with Special Reference to the Fauna of the Pacific Coast (Hymenoptera, Apoidea) Part III. University of California Press Berkeley and Los Angeles 1958, Volume 14, No. 5, pp. 303-410, plates 4-15.

P. placida and the three following species, accepta, munda, and albopicta are each known from one or two females, so that their relationship to other species cannot be elucidated fully at this time, but all certainly belong in the zonalis group. Placida is distinguished by having the facial foveae rather narrow, the frons somewhat more closely and strongly punctured than usual, and the punctures of scutellum coarser than those of scutum.

Female.—Head and thorax dark yellowish green, the propodeum more bluish. Mandibles except red tips, labrum, clypeus, and lateral marks creamy white; upper third of disk of clypeus, supraclypeal area, and subantennal plates black; lateral marks narrowed gradually above, then abruptly narrowed at lower end of foveae to intrude between them and eyes for a short distance. Pronotum brownish fuscous, the tubercles white. Abdomen creamy white, with tergite 1, band at base of tergite 2 and broad bands at junction of tergites 2-3 to 4-5 blackish; an evanescent light band on tergite 1. Legs brownish fuscous, the apex of front and middle femora, anterior side of front and middle tibiae, and front tarsi yellowish white, the middle tarsi pale brown. Antennae fuscous, the scape broadly yellowish white beneath, the flagellum pale brownish yellow beneath. Tegulae subhyaline, with basal margin whitish. Wings faintly dusky hyaline, the nervures testaceous, the subcosta and margin of stigma ferruginous.

Head somewhat broader than long. Mandibles stout, strongly curved, with a distinct inner tooth. Facial foveae rather narrow, not more than one fifth as wide as apace between eye and adjacent antennal socket, but wider than the interval between them and eye and about two thirds as long as space between antennal sockets and anterior ocellus. Pygidial plate of medium width, broader 'than in zonalis but less than in interserta, the apex with a distinct notch. Frons tessellate and rather dull, with fine close punctures, which become sparse mesad and above level of foveae. Mesonotum polished, finely and moderately closely punctured, the punctures of scutellum closer and coarser than those of scutum. Pubescence whitish, about normal for this group and not much different than in sonalis. Length, about 6 mm.; anterior wing, 3.9 mm.

One female (holotype), OwenB Valley, Inyo County, California, Aug. 2, 1932 (R. M. Bohart), in collection of the Citrus Experiment Station, Riverside.


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