Extracted from: Grigarick A.A., & Stange L.A., (1968). The Pollen Collecting Bees of the Anthidiini of California (Hymenoptera: Megachilidae) Bulletin of the California Insect Survey Volume 9.
Anthidium cockerelti Schwarz, 1928. Jour. New York Ent.
Soc., 36:386. Holotype $, near Oasis, California (UCR).
Taxonomy.—Cockerell, 1937, Amer. Mus. Novitates, 948:6; 9.
Geographic range.—Baja California, southern California, southern Nevada, western Texas, New Mexico.
Caliiornia records.—IMPERIAL Co.: Kane Springs, 24 mi. \y 1 3, 111-25-33, on Lupinus (P. Timberlake, UCR). pafo Verde, 3 mi. S, 1 $, IV-9—63, on Oenothera clavaeformis var. aurantiaca (G. Tamaki, CIS). INYO Co.: Darwin, 1 $ IV-28-59 (R. Allen, SS). Emigrant Springs, 1 9, IV-27-5(> (D. Davis, CIS). Little Lake, 1 9, VI-2-17 (C. Fox, CAS). Lone Pine, 1 9, V-24-37 (E. Van Dyke, CAS). North end Owens Lake, 1 9, VI-4-37, on Tritotium (C. Michener UCR). Shoshone, 3 mi. NW, 1 9, IV-13-63 (D. MiUer| UCD). Surprise Canyon, Panamint Mts., 1 3,1 9, V-9-58 (R. Bohart, UCD). Mazourka Canyon, Inyo Mts., 2 £ V-25-57, on Phacelia (C. Michener, UCR). KERN Co.: Mojave, 1 <$, IV-25-50 (R. Howell, CIS). RIVERSIDE Co.: Andreas Canyon, 1 $, IV—2—55, on Larrea divaricata (D. Clark, UCR). Blythe, 6 mi. S, 2 9, IV-12-44, on Phacelia (P. Timberlake, UCR); 18 mi. W, 1 <5, IV-16-51, on Phacelia (P. Timberlake, UCR). Desert Center, 12 mi. W, 1 9, V-5-36, on Dalea Emoryi (R. Snelling, LACM). Eden, 4 mi. E, 1 9, IV—17-37, on Chaenactis carphoclinia (P. Timberlake, UCD). Indio, 1 $, IV—5-51, on Geraea canescerj (E. Linsley, CIS). Oasis, 2 mi. S, 1 6\ IV-8-36, on Pa/a/on'a linearis (P. Timberlake, UCR). Near Oasis, 1 s, IV-19-25, on Cercidium (P. Timberlake, UCR). Palm Canyon, 1 9, IV-6-63 (R. Macdonald, UCD). Palm Desert, 8 o, 3 9, IV-11-50 (P. Hurd, L. Quate, CIS). Palm Springs, 3 9, III-27 to IV-1-16 (C. Fox, CAS). Whitewater, 1 o, IV-26-36, on Dalea califomica (P. Timberlake, UCR). SAN BERNARDINO Co.: Joshua Tree Nat'l Mon., 1 $, 1 9, on Larrea divaricata (R. Snelling, L. Stange, UCD). Kramer Hills, 1 9, IV-25-57, on Phacelia (P. Hurd, CIS). Manix, 22 mi. N, 14 o , 12 9. on Larrea divaricata (P. Hurd, G. Marsh, R. Schuster, CIS). Morongo Valley, 1 $, IV-21-57, on Phacelia distans (R. Snelling, M. Stage, SS). Needles, 3 $, IV-3-51 (P. Hurd, CIS). SAN DlEGO CO.: Borrego Valley, 1 8,1 9, IV-28-54, on Malacothrix (P. Hurd, CIS); 1 6\ 1 9. IV-11-51. on Phacelia (J. MacSwain, CIS); 1 9, 111-26-33, on Abronia villosa (P. Timberlake, UCR).
A. cockerelti is distinctively marked with yellow metasomal bands that are usually interrupted and reddish tegulae. The males can be distinguished by the combination of an inconspicuous yellowish setal brush (fig. 67) on sternum IV and the shape of sternum VI (fig. 62). The latter has no significant development of lateral lobes, and the median lobe is about as long as broad with the apex emarginate. The females are often confused with A. jocosum, since both species have a black clypeus contrasted with yellow mandibles. The dentation of the female mandible (figs. 97, 98) provides a reliable criterion for separating these two species. The species is found mostly in the Mojave and Colorado deserts and is apparently a strictly vernal species. It has associated with numerous plant species in at least seven different families. Records are based on 63 males and 56 females.