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Hylaeus illinoisensis (Robertson, 1896)
Prosopis illinoisensis Robertson, 1896; Prosopis illinoensis Robertson, 1897, emend; Prosopis modestus var illinoiensis_sic Metz, 1911; Hylaeus (Prosopis) certus_homonym Mitchell, 1951

Life   Insecta   Hymenoptera   Apoidea   Colletidae   Hylaeus
Subgenus: Prosopis

Hylaeus illinoisensis, female -2
© Copyright Hadel Go 2011-2016 · 8
Hylaeus illinoisensis, female -2

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Hylaeus illinoisensis, female -1
© Copyright Hadel Go 2011-2016 · 7
Hylaeus illinoisensis, female -1
Hylaeus illinoisensis, female -3
© Copyright Hadel Go 2011-2016 · 7
Hylaeus illinoisensis, female -3

Hylaeus illinoisensis, male AMNH BEE00028879-1
© Copyright Hadel Go 2011-2016 · 7
Hylaeus illinoisensis, male AMNH BEE00028879-1
Hylaeus illinoisensis, male AMNH BEE00028879-3
© Copyright Hadel Go 2011-2016 · 7
Hylaeus illinoisensis, male AMNH BEE00028879-3

Hylaeus illinoisensis, male AMNH BEE00028879-2
© Copyright Hadel Go 2011-2016 · 6
Hylaeus illinoisensis, male AMNH BEE00028879-2
Hylaeus illinoisensis, figure11n
Mitchell, Bees of the Eastern United States, Vol. I, 1960 · 1
Hylaeus illinoisensis, figure11n

Hylaeus illinoisensis, figure13g
Mitchell, Bees of the Eastern United States, Vol. I, 1960 · 1
Hylaeus illinoisensis, figure13g
Hylaeus illinoisensis, figure14c
Mitchell, Bees of the Eastern United States, Vol. I, 1960 · 1
Hylaeus illinoisensis, figure14c

Hylaeus illinoisensis, M scutum interpit
Deana Crumbling · 1
Hylaeus illinoisensis, M scutum interpit
Hylaeus illinoisensis, M scutum side
Deana Crumbling · 1
Hylaeus illinoisensis, M scutum side
Overview
Reprinted with permission from: Mitchell, T.B. 1960 Bees of the Eastern United States. North Carolina Agricultural Experiment Station Technical Bulletin No. 141.


FEMALE—Length 6-7 mm.; black; antennae black above, piceous below; face marks yellow, triangular, entirely filling area between clypeus, eyes and antennae, terminating obliquely on eye margin at level of antennae; tubercles and two conspicuous maculae on collar yellow; tegulae piceous, not maculated; wings subhyaline, veins and stigma piceous; front and mid tibiae with basal yellow spots slightly more than a third of their length; slightly more than basal half of hind tibiae yellow; legs otherwise black; spurs yellowish; face somewhat narrowed below; cheeks sub- equal to eyes in width in lateral view; foveae linear, deep and distinct, separated from eye by a space of about equal width, markedly divergent from eye above; inner orbits slightly elevated above level of eyes; 2nd segment of flagellum slightly broader than long, these dimensions subequal in 1st and 3rd segments, following segments slightly longer; front coxae simple; dorsal area of propodeum about as long as metanotum, coarsely reticulate, as also the posterior surface which is bounded by a low carina and with a deep median groove, surface somewhat obscured by greyish tomentum, lateral surfaces finely rugose; metanotum densely and finely rugose; face below antennae tessellate, sparsely and very shallowly and obscurely punctate; surface above antennae closely, deeply and rather coarsely punctate, subrugose; scutum quite coarsely and deeply punctate, close but not crowded, tessellate between punctures; punctures of scutellum slightly more sparse, deep and separate; pleura dull, densely tessellate, with coarse, shallow, well separated punctures; basal segment of abdomen shining, nearly impunctate, 2nd and following segments less shining, with rather close and very minute punctures.

MALE—Length 5-6 mm.; black; antennae blackish above, brownish beneath; scape, mandibles and labrum black; tegulae piceous, not maculated; wings subhyaline, veins and stigma brownish; maculations yellow, as follows: entire face below antennae, supraclypeal mark subquardrate, somewhat rounded above between antennae, face marks contiguous with antenna, fossa on outer side, obliquely truncate just above antennae, tubercles and two small spots on collar, all the tibiae, tarsi and spurs, but front and mid tibiae with large ferruginous blotches on under side, partially encircling mid tibiae; face narrowed below; cheeks slightly narrower than eyes; scape somewhat robust, diameter at apex considerably exceeding diameter of flagellum, 1st and 2nd segments of flagellum about as long as broad, following segments somewhat longer; front coxae simple; dorsal area of propodeum slightly longer than metanotum, very coarsely reticulate, as also posterior surface which is delimited by a low, barely evident carina, this interrupted medially above, lateral surfaces finely, irregularly rugose; punctures of scutum deep and quite coarse, crowded anteriorly, close over remainder of disc, well separated but not sparse on scutellum; quite coarse and well separated on pleura; basal segment of abdomen shining, impunctate, 2nd and following segments closely and very minutely punctate; wings of 7th sternum crescentic, the outer concave margin fringed with fine setae; distal pedicel of 8th sternum rather narrow, truncate apically; penis valves of genital armature not attaining tips of gonostyli, the latter rather robust, narrowly rounded apically.
DISTRIBUTION—Illinois and West Virginia to New York, Massachusetts and Maine; June, July and August.

FLOWER RECORDS—Only one flower record has been seen by the writer, a male having been collected by H. V. Weems, Jr. on Apocynum cannabinum in Raleigh Co., W. Va., June 6, 1955. Robertson (1929) records illinoensis on the following: Aruncus, Aster, Cicuta, Cornus, Crataegus, Eulophus, Gonolobus, Heracleum, Lycopus, Osmorrhiza, Pastinaca, Rhus, Salix, Solidago, Taenidia, Thaspium and Viburnum. At the time that certus was described it was believed that illinoensis was a synonym of modestus, having been recognized as a variety of that species by Metz (1911), and later reduced to synonymy in the Catalog of Hymanoptera (Muesebeck, et al, 1951, p. 1051). Recently the writer had the opportunity to study the type of illinoensis at the Illinois Natural History Survey and found it to be similar in all respects to certus Mitchell.

Identification
Very difficult to tell from modestus, possibly the same species.

Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Apiaceae  Cicuta maculata @ UCRC_ENT (1)

Daucus carota @ UCRC_ENT (5); AMNH_BEE (1); BBSL (1)
Apocynaceae  Apocynum cannabinum @ UCRC_ENT (3)
Asteraceae  Erigeron philadelphicus @ UCRC_ENT (1)

Solidago canadensis @ UCRC_ENT (2)

Solidago rugosa @ UCRC_ENT (2)

Solidago @ UCRC_ENT (1); AMNH_BEE (1)

Sonchus arvensis @ UCMS_ENT (1)
Boraginaceae  Phacelia dubia @ UCRC_ENT (1)
Campanulaceae  Campanula carpatica @ UCRC_ENT (1)
Caryophyllaceae  Cerastium velutinum @ UCRC_ENT (2)
Rhamnaceae  Ceanothus americanus @ UCRC_ENT (2)
Rosaceae  Rosa @ UCRC_ENT (13)

Rubus argutus @ UCRC_ENT (2)

Rubus @ UCRC_ENT (3)

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Updated: 2019-06-25 07:29:17 gmt
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