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.
As indicated above, the female assigned by Metz to this species is H. wooton;; the male type, now in the collection of the University of California
at Riverside, is from Filmore Canyon, New Mexico, collected on Aug. 27 by
T. O. A. Cockerell. Another male, with identical data is in the collections of
the Los Angeles County Museum.
Until the present study was undertaken H. cookii was known only from
the type. It is doubtful if this species could have been recognized from the
original description, or the figures of the genitalia and hidden ventrites as
illustrated by Metz. When I was able to examine the type, I found it to be
identical with a species which P. H. Timberlake and I had independently
assumed to be undescribed. Because of the inadequacies of the original description,
the species is redescribed and the hidden ventrites illustrated.
Diagnosis.-Male: Small species, head width not exceeding I mm.; scape
less than half as wide as long; lateral face marks ending well above level of
antennal sockets; frontal punctures coarse, distinct; mesoscutal punctures
distinctly finer than those of frons; punctures of tergite I as coarse as those of
mesoscutum, those of tergite II finer, dense on both segments. Female: Small,
head width not exceeding 1.3 mm.; frontal punctures coarse, distinct; mesoscutal
punctures equal to those of frons; metanotum not rugulose, with
distinct punctures; abdominal punctation similar to that of male, but punctures
finer, tergite III distinctly, though finely, punctate.
Male.-Integument black, except the following pale creamy-white: clypeus;
supraclypeal mark; lateral face marks, ending acutely on eye margin
well above level of antennal sockets; medially interrupted stripe on pronotal
collar; pronotal lobe; spot on anterior half of tegula; small apical spot on all
femora; stripe on anterior tibiae; elongate basal and small apkal spots on
middle and hind tibiae; basitarsal and mediotarsal segments. Apical tarsal
segments light ferruginous; tibial spurs whitish. Wings whitish-hyaline, veins
and stigma light ferruginous. Erect pubescence whitish.
Head: UFO 0.76 x FL; LFD 0.52 x UFD; OCD 1.06-1.21 x TFD; basal
width of clypeus 0.77 x distance from laterobasal angle to eye margin; distance
between antennal sockets about equal to a socket diameter, distance from
sockets to eye margin about 0.85 x a socket diameter. Maximum scape width
about 0.42 x maximum length; minimum length of first flagellar segment
about one-half length of second. Maculate portions of face slightly shining,
finely punctate, those of clypeus separated by one-half to a full puncture
diameter, those of lateral part of face somewhat elongate, linearly arranged,
spacing variable; frons coarsely. contiguously punctate, the punctures distinct,
the frons somewhat bulging on either side of midline. Vertex sharply raised
above tops of eyes, coarsely punctate, the punctures crowded and less sharply
defined than on frons.
Thorax: Mesoscutum dull, closely coarsely punctate, the punctures
slightly larger than those of frons, separated by one-third to one-half a puncture
diameter; mesoscutellum slightly shining, punctures about equal to those of mesoscutum, separated by one-half to a full puncture diameter; metanotum
duU, densely tesselate, with punctures finer than those of mesoscutum, separated
by about a puncture diameter: mesopleurae dull, tesselate, punctures
about equal to those of mesoscutum, separated by about one-third to one-half
a puncture diameter. Basal area of propodeum areolate; lateral areas coarsely
punctate, the punctures poorly defined; transverse carina poorly developed,
oblique carina absent; disc densely tesselate, with coarse punctures.
Abdomen: Tergite I shining, smooth, densely punctate, the punctures
smaller than those of mesoscutum, separated by one-half to a full puncture
diameter; tergite II more finely closely punctate, apical one-third (approximately),
depressed, with scattered micropunctures, apical margin slightly
reflexed; tergite III more finely, sparsely punctate; apical ventrites as
illustrated.
Length, to apex of second tergite, 3.0-3.4 mm.; of forewings, 2.45-2.9
mm.
Female.-Similar to male in essential features, except as follows: c1ypeus
and supraclypeal area dark, lateral face marks more rounded above; UFO
0.72-0.80 x FL: LFO 0.55-0.61 x UFO; OCD 1.02-1.07 x TFD; basal width
of clypeus equal to distance from laterobasal angle to eye margin; distance
between antennal sockets about 1.5 x a socket diameter: distance from sockets
to eye margin slightly exceeding a socket diameter.
Length, to apex of second tergite, 4.0-4.3 mm.; of forewings, 3.2-3.5 mm.
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