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Ashmeadiella difugita Michener, 1939
Ashmeadiella (Ashmeadiella) difugita emarginatula Michener, 1951, valid subspecies

Life   Insecta   Hymenoptera   Apoidea   Megachilidae   Ashmeadiella
Subgenus: Ashmeadiella


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Overview
Species account taken from: "A Revision of the Genus Ashmeadiella (Hymen., Megachilidae) Author(s): Charles D. Michener Source: American Midland Naturalist,Vol. 22, No. 1 (Jul., 1939), pp. 1-84"


This species is superficially similar to femorata and titusi, but differs from them by the slender, nearly straight, finely serrate hind tibial spurs, and the longer face. It differs also from haematopoda and its relatives by the much less abundant white pubescence and the blacker legs. In spite of its red hind femora, it seems likely that this species is most closely related to cactorum, although it is somewhat more finely and closely punctate than that species.


Female: Inner margins of eyes converging toward clypeus; facial line about as long as transfacial; flagellum dark brown beneath; truncation of clypeus feebly concave, with impunctate margin, and slightly shorter than distance from its end to eye margin; clypeus, except for apical margin and finely punctate preapical part, shining and coarsely punctate; mandibles with red subapical band, distance from first to third tooth much less than greatest width of eye and less than length of last three antennal segments together; cheeks considerably more finely punctate than vertex, narrower than eyes, seen from side; anterior ocellus much farther from antennal bases than from pos- terior edge of vertex; posterior ocelli separated by distance slightly less than (or about equal to) distance to eye and to posterior edge of vertex; vertex, supraclypeal area, and frons, especially the latter, finely and closely punctate in contrast to clypeus. Scutum hardly more coarsely punctate than vertex, without pair of pubescent spots anteriorly; tegulae somewhat brownish; mesep- isterna nearly as coarsely punctate as and a little more sparsely punctate than scutum; wings slightly dusky; hind femora red; inner sides of hind tibiae red; middle femora with inconspicuous *reddish areas (absent in paratypes); hind tibial spurs rather straight and finely serrate, inner margin of inner spurs with about seventeen small teeth, outer margin with about eleven; outer spurs with eight or nine teeth on each margin. Abdomen considerably more finely punc- tate than scutum, punctures of first three tergites medially separated by about twice their diameters; tergites one to five with apical bands of white pub- escence; scopa whitish. Length 51/2 mm. (5 mm. in one paratype).


Male: Similar to female; anterior margin of clypeus with rather deep emargination, shorter than basal width of clypeus and demarked by rounded angles; clypeus more finely punctate than in female, although nevertheless (except anteriorly) considerably more coarsely so than vertex; cheeks con- siderably narrower than eyes, seen from side; distance between posterior ocelli about equal to distance to eye and to posterior edge of vertex. Scutum not more coarsely punctate than vertex, but a little more sparsely so; mesepisterna more coarsely punctate than scutum (not so in some paratypes). Abdominal punctures slightly closer but not coarser than those of female; lateral teeth of sixth tergite longer than broad, apices acutely angulate; median teeth more than twice as long as broad, apical parts parallel sided. Length 5 mm. (vary- ing to 4 mm.)


Holotype female: Lone Pine Canyon, San Gabriel Mountains, California, July 4, 1933, on Eriodictyon trichocalyx (P. H. Timberlake). Allotype male: Big Pines Camp, San Gabriel Mountains, July 13, 1927, on Verbena (P. H. Timberlake). Paratypes: One female, near falls, Mill Creek Canyon, San Bernardino Mountains, California, 6200 feet elevation, August 15, 1934, on Chrysopsis fastigiata (P. H. Timberlake); one male, Camp Baldy, San Gabriel Mountains, August 21, 1929, on Eriogonum fasciculatum (P. H. Timber- lake); two males, Swartout Valley, San Gabriel Mountains, Califomia, June 3, 1928, one on pink Gilia, the other on Phacelia heterophylla. All the above type material is in the Timberlake collection at the Citrus Experiment Sta- tion of the University of California at Riverside

Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Boraginaceae  Phacelia heterophylla @ UCRC_ENT (1)
Fabaceae  Lotus heermannii @ BBSL__KWC (4)
Hydrophyllaceae  Eriodictyon angustifolium @ BBSL (1)
Polygonaceae  Eriogonum fasciculatum @ UCRC_ENT (1)
Rosaceae  Holodiscus microphyllus @ BBSL (1)
_  Withheld @ BBSL__YOSE (29); BBSL (92); BBSL__PINN (1)

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Updated: 2024-03-29 12:06:09 gmt
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