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Ashmeadiella maxima Michener, 1936
Life   Insecta   Hymenoptera   Apoidea   Megachilidae   Ashmeadiella
Subgenus: Ashmeadiella

Ashmeadiella maxima, female, face
Smithsonian Institution, Entomology Department · 9
Ashmeadiella maxima, female, face

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Ashmeadiella maxima, female, side
Smithsonian Institution, Entomology Department · 9
Ashmeadiella maxima, female, side
Ashmeadiella maxima, female, top
Smithsonian Institution, Entomology Department · 9
Ashmeadiella maxima, female, top

Ashmeadiella maxima, female, wing
Smithsonian Institution, Entomology Department · 9
Ashmeadiella maxima, female, wing
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 is a large, robust, black species, with rather abundant pubescence. The male may be confused with opuntiae, but differs by the broader face, and the somewhat more widely separated posterior ocelli, as compared to the distance from one of them to the posterior edge of vertex.

Female: Inner margins of eyes converging toward clypeus; under side of flagellum brown; punctation of head rather coarse, punctures separated by a little smooth surface; face broad, greatest distance between eyes equal to length of an eye; punctures of clypeus, except for the impunctate anterior margin and the finely and closely punctate area adjacent to this margin, larger than those of vertex; punctures between ocelli and on lower part of frons and upper part of supraclypeal area finer and closer than those of vertex posterior to ocelli; truncation of clypeus somewhat concave medially, its lateral angles rounded, its length slightly less than distance from end of truncation to lateral angle of clypeus; distance between first and third mandibular teeth much less than width of eye, slightly less than length of last three antennal segments together; anterior ocellus about at the midpoint between bases of antennae and posterior margin of vertex; distance between posterior ocelli about equal to distance to nearest eye margin, less than distance to posterior margin of vertex; cheeks considerably narrower than eyes, seen from side. Punctation of scutum like that of vertex; scutum with pair of pubescent spots anteriorly; mesepisterna, especially below, a little more coarsely punctate than scutum, with a few minute punctures among the larger ones; tegulae and apical seg- ment of each tarsus brown or nearly black; margins of hind tibial spurs finely serrate, inner marigin of inner spurs more finely so than others, teeth of outer spurs somewhat oblique. Punctures of abdomen rather coarse and close, espe- cially on sides and on posterior tergites; tergites one to five with apical pub- escent bands. Length 7',2 to 9 mm.

Male: Similar to female except as indicated: greatest distance between eyes slightly less than length of an eye; clypeus finely and closely punctate, except for smooth apical margin; apex of clypeus with emargination about three-fourths as wide as basal width of clypeus, and demarked by evident but rounded angles; face except for clypeus largely covered with white pub- escence; lateral teeth of sixth tergite rather large and acutely pointed, median teeth quite long, broadened basally, nearly parallel sided apically, concavity between them much longer than semicircle. Length nearly 8 mm.

TEXAS: Range, August 11, 1904, on Opuntia (J. C. Crawford); Sabinal, June 16 and 18, 1910 (F. C. Pratt); Laredo, October 21, 1908 (Mitchell and Bishopp); Kerville, April 11, 1909, on Salhia pitcheri (F. C. Pratt) (all from U. S. N. M.); Pecos High Bridge (Pilsbry) (Acad. Nat. Sci. Phila.)

Scientific source:

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FamilyScientific name @ source (records)
Fabaceae  Dalea greggii @ BBSL (1)
_  Withheld @ BBSL (1); BBSL__CAVE (1)

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Updated: 2018-07-18 15:27:09 gmt
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