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Hylaeus polifolii (Cockerell, 1901)
Prosopis polifolii Cockerell, 1901; Hylaeus polifolii catalinensis Cockerell, 1938

Life   Insecta   Hymenoptera   Apoidea   Colletidae   Hylaeus
Subgenus: Paraprosopis


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Overview
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 common California species is closely related to H. wooton; and females are apt to be very difficult to separate in the absence of males. The two species are largely allopatric with overlaps occurring only in some areas of southern California and along the western portions of the Sierra Nevada. Females of H. polifolii which possess the preapical clypeal macula are easily recognized; I have never seen specimens of H. wootoni so maculated. The population of H. polifolii present on Santa Catalina Island, Los Angeles Co., Calif., was given a varietal name by Cockerell; in the females of this population, the clypeal macula seems always to be present. Populations from mainland California mayor may not have a maculate clypeus, but this feature is subject to much variation within a given sample and is, moreover, not correlated with distribution. I see nothing to be gained by recognition of this insular form and have synonymized it under the nominate form.

The facial maculae of the males, too, are subject to considerable variation. In what I consider to be the basic or "typical" pattern, the clypeus is entirely yellow, the supraclypeal area is black, and the lateral face marks terminate above at a point about equal to a socket diameter above the antennal sockets. One variant form, very rare, exhibits an obscure maculation of variable size on the supraclypeal area. In the second variant form, which is fairly common, the clypeus becomes darkened along the lateral margins; this infuscation frequently encroaches so extensively onto the clypeus that the maculation is reduced to an erect median stripe.


Names
Scientific source:

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Hosts · map
FamilyScientific name @ source (records)
Adoxaceae  Sambucus nigra @ UCRC_ENT (1)
Amaryllidaceae  Allium haematochiton @ UCRC_ENT (2)
Anacardiaceae  Rhus laurina @ UCRC_ENT (2)

Rhus ovata @ UCRC_ENT (1)

Rhus trilobata @ UCRC_ENT (1)

Rhus @ UCRC_ENT (1)
Apiaceae  Lomatium dasycarpum @ UCRC_ENT (5)

Pimpinella anisum @ UCRC_ENT (4)
Asteraceae  Aster novae-angliae @ BBSL (1)

Baccharis emoryi @ UCRC_ENT (6)

Baccharis glutinosa @ UCRC_ENT (1)

Baccharis salicifolia @ UCRC_ENT (5)

Chrysothamnus @ UCRC_ENT (1)

Conyza canadensis @ UCRC_ENT (2)

Coreopsis lanceolata @ UCRC_ENT (1)

Corethrogyne @ UCRC_ENT (2)

Deinandra paniculata @ UCRC_ENT (2)

Ericameria arborescens @ BBSL (1); AMNH_BEE (2)

Ericameria nauseosa @ UCRC_ENT (1)

Ericameria palmeri @ UCRC_ENT (2)

Ericameria parishii @ UCRC_ENT (13)

Erigeron platyphyllus @ UCRC_ENT (1)

Eriophyllum confertiflorum @ UCRC_ENT (1)

Eriophyllum multicaule @ UCRC_ENT (3)

Euthamia occidentalis @ UCRC_ENT (2)

Grindelia hirsutula @ UCRC_ENT (2)

Grindelia @ UCRC_ENT (1)

Gutierrezia sarothrae @ UCRC_ENT (1)

Heterotheca grandiflora @ UCRC_ENT (4)

Lasthenia gracilis @ UCRC_ENT (2)

Leucanthemum @ UCRC_ENT (1)

Malacothrix saxatilis @ UCRC_ENT (2)

Pluchea sagittalis @ UCRC_ENT (5)

Senecio californicus @ UCRC_ENT (1)

Solidago californica @ UCRC_ENT (2)

Solidago @ UCRC_ENT (14)

Tetradymia canescens @ UCRC_ENT (2)
Boraginaceae  Cryptantha intermedia @ UCRC_ENT (3)

Eriodictyon @ AMNH_BEE (1)

Phacelia cicutaria @ UCRC_ENT (1)

Phacelia distans @ UCRC_ENT (25)
Brassicaceae  Alyssum @ UCRC_ENT (2)

Lobularia maritima @ UCRC_ENT (1)
Crassulaceae  Sedum @ UCRC_ENT (14)
Ericaceae  Arctostaphylos pungens @ UCRC_ENT (2)
Euphorbiaceae  Euphorbia albomarginata @ UCRC_ENT (3)
Lamiaceae  Agastache rupestris @ BBSL (1)

Mentha spicata @ UCRC_ENT (1)

Mentha @ UCRC_ENT (1)

Monardella linoides @ UCRC_ENT (1)
Malvaceae  Malva @ UCRC_ENT (1)
Papaveraceae  Eschscholzia californica @ UCRC_ENT (1)
Plantaginaceae  Keckiella antirrhinoides @ UCRC_ENT (2)
Polygonaceae  Eriogonum fasciculatum @ AMNH_BEE (1); UCRC_ENT (24)

Eriogonum gracile @ UCRC_ENT (6)

Eriogonum latifolium @ UCRC_ENT (4)

Eriogonum molestum @ UCRC_ENT (1)

Eriogonum nudum @ UCRC_ENT (1)

Eriogonum vimineum @ BBSL (1)

Eriogonum wrightii @ UCRC_ENT (4)

Eriogonum @ UCRC_ENT (2)
Rhamnaceae  Ceanothus crassifolius @ UCRC_ENT (4)

Ceanothus integerrimus @ UCRC_ENT (1)

Ceanothus verrucosus @ UCRC_ENT (3)

Rhamnus californica @ UCRC_ENT (7)

Rhamnus crocea @ UCRC_ENT (6); AMNH_BEE (1)

Rhamnus ilicifolia @ UCRC_ENT (3)
Rosaceae  Adenostoma fasciculatum @ UCRC_ENT (3)

Heteromeles arbutifolia @ UCRC_ENT (10)
Salicaceae  Salix laevigata @ UCRC_ENT (1)

Salix lasiolepis @ UCRC_ENT (3)
Scrophulariaceae  Scrophularia californica @ UCRC_ENT (3)
Tamaricaceae  Tamarix @ AMNH_BEE (1)
_  Withheld @ BBSL (204)

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