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Perdita fulvicauda Timberlake, 1962
Life   Insecta   Hymenoptera   Apoidea   Andrenidae   Perdita
Subgenus: Perdita

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Extracted from: Timberlake P.H., (1962). 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 V. University of California Publications in Entomology Editors, Volume 28, No. 1, pp. 1-124.

This species is very similar to erythropyga but has more extensive white and yellow markings, the pubescence of the mesonotum rather denser and more mosslike, and the wings more whitish hyaline with paler nervures. Possibly it would be better to call erythropyga and fulvicauda forms of one species, but both occur in the Palm Springs region without evident intergradation.

Female.—Agreeing with erythropyga in most characters. Face marks whitish, or sometimes yellow; when most developed, clypeus light except for two broad submedian stripes and usual part of dots, and lateral marks broadly transverse but with a slender orbital extension to level of antennae; or sometimes the pale color of clypeus reduced to a narrow line on lateral margins and a median stripe, or entirely lacking. Abdomen with a broad, entire yellowish-white (or yellow) band at base of tergites 2 to 4 not quite reaching lateral margins, and generally with two small marks close together at summit of basal declivity of tergite 1; these marks sometimes moderately enlarged, almost contiguous, and enclosing a dark spot on their outer half. Venter and two apical tergites fulvous; venter more yellowish toward base. Tubercles sometimes slightly yellowish on dorsal margin before apex. Extreme apex of middle femora and anterior side of middle tibiae yellow, like front legs (middle tibiae in erythropyga often dark or with much less yellow on anterior side than front tibiae). Scape of antennae more or less whitish beneath, at least on basal half. Wings whitish hyaline, nervures pale testaceous, subcosta and margins of stigma pale brownish.

Structurally like erythropyga, but pygidial plate sometimes slightly less broadly rounded, and pubescence of mesonotum coarser and more mosslike. Length: 4r-5.5 mm.; anterior wing, 3-3.4 mm.

Male.—Resembles male of erythropyga, but face below antenna usually all or nearly all yellow except for usual pair of clypeal dots. Tergites 1 to 3 or 4 dark, with an interrupted pale-yellow band on 2 and 3, or 2 to 4; but sometimes tergite 1 slightly yellow just before apical depression, and dark area on following segments more or less reduced, so that in extreme cases only basal margin, broad lateral margin on basal half of segments, and a suffused roundish spot on each side subapically remain dark on tergites 2 and 3. Legs yellow; front and middle legs fuscous or brownish on posterior side of femora, and with a narrow dark streak on tibiae; hind coxae dark on basal half, hind femora dark except narrowly beneath and at apex, hind tibiae pale fuscous except on anterior side, and hind tarsi pale brownish except apical joint. Wings whitish hyaline, with rather pallid nervures as in the female.

Structurally like erythropyga, but with slightly coarser pubescence on mesonotum, and pubes-cence on disk of subgenital plate longer and more evident. Aedeagus very similar, but volsellae shorter and less exposed, reaching to, or just beyond, middle of parameral lobes, with tubercles of inferior pair restricted to dorsal margin. Length: 3.5-4.5 mm.; anterior wing, 3-3.1 mm.

Scientific source:

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FamilyScientific name @ source (records)
Asteraceae  Stephanomeria @ UCRC_ENT (1)
Boraginaceae  Nama hispidum @ UCRC_ENT (4)

Phacelia distans @ UCRC_ENT (6)

Tiquilia palmeri @ UCRC_ENT (4)

Tiquilia @ UCRC_ENT (2)
Fabaceae  Dalea mollis @ UCRC_ENT (37)

Dalea @ UCRC_ENT (7)

Melilotus sp @ BBSL (1)

Psorothamnus @ UCRC_ENT (11)
Loasaceae  Mentzelia involucrata @ UCRC_ENT (1)

Mentzelia multiflora @ UCRC_ENT (4)
Zygophyllaceae  Larrea tridentata @ BBSL (1)
_  Withheld @ BBSL (6)

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Updated: 2024-06-17 20:26:16 gmt
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