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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » Aculeata - Ants, Bees and Stinging Wasps » Apoidea (clade Anthophila) - Bees » Leafcutter, Mason, and Resin Bees, and allies (Megachilidae) » Leafcutter, Resin, Mortar, Sharptail, Mason, and Woolcarder bees and relatives (Megachilinae) » Mason bees and relatives (Osmiini) » Mason Bees (Osmia) » Subgenus Cephalosmia (Osmia Subgenus Cephalosmia) » Osmia montana » Osmia montana quadriceps
Photo#104279
Osmia? - Osmia montana
Copyright © 2007 Hartmut Wisch

Osmia? - Osmia montana
Mill Creek Summit area, ~4970 ft. altitude, San Gabriel Mountains, Los Angeles County, California, USA
April 6, 2007
Size: ~10 mm
In Rhus trilobata (Skunkbrush). I find the large, square head rather striking.

Images of this individual: tag all
Osmia? - Osmia montana Osmia? - Osmia montana Osmia? - Osmia montana
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Contributed by Hartmut Wisch on 20 April, 2007 - 1:46pm
Last updated 1 January, 2008 - 4:18pm

Moved
Moved from Osmia montana.
… Beatriz Moisset, 1 January, 2008 - 4:18pm login or register to post comments

this is a Cephalosmia, named for its striking head
Cephalosmia is a subgenus of Osmia.

This is Osmia (Cephalosmia) montana quadriceps Cresson, 1878, a common species in California.

The smooth, shining, and concave lower face (including clypeus) and nearly black (not green or blue) integument is typical of O. montana.
… John S. Ascher, 20 April, 2007 - 2:09pm login or register to post comments

 
Thanks, John,
for the ID! I've seen this bee before, possibly Mt. Pinos area, might even have some other photos buried in my files.
… Hartmut Wisch, 20 April, 2007 - 2:25pm login or register to post comments

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