Solitary Digger Bee
( Habropoda depressa )


2012-0407-01100112-HYM00626-Habropoda_depressa[1221h40s,F,A,plant-flower]{EXD}-G.jpg

PHOTO COMMENT
The nesting biology of Habropoda depressa Fowler is described for urban (University of California at Berkeley) and island (Santa Cruz Island) populations in the state of California (USA). This protandrous species is common in the California foothills where adults are active from late February through early June. Larvae do not spin cocoons and pupate to overwinter as adults by November. A portion of the population appears to delay development since prepupae were found in nest excavations early in the nesting season. Brood cells were parasitized mostly by two dipterans: bombyliid flies and an anthomyiid species, Leucophora fusca Huckett (found only on SCI). Unlike its congeners which nest in sandy soils, H. depressa nests in hard-packed soils, including clay. During the nesting season, females spend evenings outside burrows, roosting on nearby vegetation before returning to their nest the following morning. At the urban locale, female bees subsist almost entirely upon exotic and horticultural plant varieties while the majority of host plant collection records at Santa Cruz Island were from native species. On average, nests made by bees at UCB were significantly shorter than those constructed at SCI, although the average number of cells per nest was greater. These foraging and nest architectural differences may reflect either variation among populations or adaptations to urbanization effects of the last century. Barthell, John F., et al. 1988.

IDENTIFICATION
Identification:Habropoda depressa
(Fowler ,1899 )
Common Name:Solitary Digger Bee
Life Stage:(A) adult

PHYLOGENY

Phylum:Arthropoda
Class:Insecta
Superorder:Holometabola
Order:Hymenoptera
Suborder:Apocrita
Family:Apidae
Subfamily:Apinae
Tribe:Anthophorini
Genus:Habropoda
Taxon Code:HYM00626
ITIS/TSN:699265

LOCATION DETAILS
Location Name
Gardens at Lake Merritt, Lakeside Park, 666 Bellevue, Oakland
County:Alameda County
ECI Site#:CA01100110

RECOGNITION
Body Length
5-15 mm.

BIOLOGY
Solitary; ground nesting. Adults are active from February to early June in California.
Habitat
Unlike its congeners which nest in sandy soils, H. depressa nests in hard-packed soils, including clay.
Active Period
Adults are active from February to early June in California.
Development
Larvae do not spin cocoons and pupate to overwinter as adults by November.

CREDITS
Photographer
Eddie Dunbar
Insect Sciences Museum of California

References
Species Habropoda depressa. (http://bugguide.net/node/view/51916). Accessed March 12, 2016. .
ITIS.
John F. Barthell, Daniel M. Bromberger, Howell V. Daly and Robbin W. Thorp. Nesting Biology of the Solitary Digger Bee Habropoda depressa (Hymenoptera: Anthophoridae) in Urban and Island Environments. Journal of the Kansas Entomological Society. Vol. 71, No. 2 (Apr., 1998), pp. 116-136


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