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Trachusa autumnalis (Snelling, 1966)
HETERANTHIDIUM AUTUMNALE
Heteranthidium autumnale Snelling, 1966

Life   Insecta   Hymenoptera   Apoidea   Megachilidae   Trachusa
Subgenus: Heteranthidium

Trachusa autumnalis, female, head, mtg
© Kimberly Huntzinger, 2007 · 1
Trachusa autumnalis, female, head, mtg

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Identification
Extracted from THE POLLEN-COLLECTING BEES OF THE ANTHIDIINI OF CALIFORNIA (Hymenoptera: Megachilidae) by GRIGARICK A., A. (1968).

Geographic range.—Southern California, Colorado Desert. California records.—RIVERSIDE Co.: Desert Hot Springs, 3 mi. NE, 1 6\ 1 9, XI-8-63 (R. McDiarmid, LACM). The color of both sexes of this species is black with pale yellow maculations. The metasomal bands are closed to form a black spot more typical of other genera of the tribe. H. autumnale exhibits a number of morphological characteristics similar to H. timberlakei and H. zeb-ratum. The females of autumnale are distinguished with a clypeus with a relatively smooth apical mar¬gin and a tergum VI that is nearly straight when
viewed from the side (fig. 122), contrasted to the toothed clypeus and convex tergum VI of timber¬lakei (fig. 126). Both sexes of autumnale have more strongly developed forecoxal projections and carinae on the leading edge of the pronotal lobes than tim¬berlakei. No information is known of the biology of this rare species. Its scarcity may be attributed to the infrequency of collections in the fall season.

Names
Scientific source:

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FamilyScientific name @ source (records)
_  Asteraceae sp @ BBSL__KWC (1)

Withheld @ BBSL (1)

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Updated: 2017-12-15 13:11:11 gmt
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