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Reprinted from: Snelling, R. 1970. STUDIES ON NORTH AMERICAN BEES OF THE GENUS
HYLAEUS. 5. THE SUBGENERA HYLAEUS. S. STR. AND
PARAPROSOPIS (HYMENOPTERA: COLLETIDAE) Contributions in Science, No. 180.
This is the species which Crawford called P. mesillae when he raised that
name to specific level after Metz had reduced mesillae to a variety of H. cressoni
(Cockerell).
Diagnosis: The male differs from that of H. c. mesillae in the less coarsely,
closely punctate abdomen and in the shape of ventrite IX. The female differs
in the much finer, sparser punctures of tergite II, the shorter, sparser pubescence
of the abdomen, and the smaller size.
Male. Very similar structually to that of H. c. mesillae but differs in having
the punctures of the mesoscutum finer, sparser, usually separated by a
puncture diameter or more; punctures of tergite I very fine, separated by two
or more times a puncture diameter; discal pubescence of tergite III shorter
than that of mesoscutum; apical lobes of ventrite IX broad, as long as, or
longer than, basal pedicle.
Female. Very similar structually to that of H. c. mesillae but differs as
follows: punctures of median area of upper face of tergite I extremely fine,
perceptible only under high magnification, very sparse; lateral areas of pro podeum
roughened, densely tesselate, with scattered, but distinct, punctures;
erect discal pubescence of tergite III little, if any, more than two-thirds an
ocellar diameter in length (a few widely scattered hairs may attain this length,
but are outnumbered by shorter hairs). Length, both sexes, to apex of tergite II, 3.2-3.7 mm.
Holotype male, allotype female (Los Angeles County Museum of Natural
History), Winterhaven, Imperial Co., California, March 25, 1956 (R. R.
Snelling), Heliotropium curassavicum.
k; Length, both sexes, to apex of tergite II, 3.2-3.7 mm.
Holotype male, allotype female (Los Angeles County Museum of Natural
History), Winterhaven, Imperial Co., California, March 25, 1956 (R. R.
Snelling), Heliotropium curassavicum.
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Identification | |
Extracted from: Snelling R.R.,(1970). Studies on North American Bees of the Genus Hylaeius. 5. The Subhenera Hylaeus, S. Str. and Paraprosopis (Hymenoptera: Colletidae). Los Angeles County Museum of Natural History.
Diagnosis: The male differs from that of H. c. mesillae in the less coarsely, closely punctate abdomen and in the shape of ventrite IX. The female differs in the much finer, sparser punctures of tergite II, the shorter, sparser pubescence of the abdomen, and the smaller size.
Male. Very similar structually to that of H. c. mesillae but differs in having the punctures of the mesoscutum finer, sparser, usually separated by a puncture diameter or more; punctures of tergite I very fine, separated by two or more times a puncture diameter; discal pubescence of tergite III shorter than that of mesoscutum; apical lobes of ventrite IX broad, as long as, or longer than, basal pedicle.
Female. Very similar structually to that of H. c. mesillae but differs as follows: punctures of median area of upper face of tergite I extremely fine, perceptible only under high magnification, very sparse; lateral areas of propo-deum roughened, densely tesselate, with scattered, but distinct, punctures; erect discal pubescence of tergite III little, if any, more than two-thirds an ocellar diameter in length (a few widely scattered hairs may attain this length, but are outnumbered by shorter hairs).
Length, both sexes, to apex of tergite II, 3.2-3.7 mm.
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Updated: 2024-04-18 18:12:20 gmt
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