Extracted from THE POLLEN-COLLECTING BEES OF THE ANTHIDIINI OF CALIFORNIA (Hymenoptera: Megachilidae) by GRIGARICK A., A. (1968). |
Anthidium tenuiflorae Cockerell, 1907. Can. Ent, 39.135 I.
6\ Holotype 9, Boulder, Colorado (UCR). Anthidium tenuiflorae yukonense Cockerell, 1926. Ar.r.. Mac
Nat. Hist., (9) 18:622 <$, 9. Holotype 6\ Carcam, Yuk.-r.
Terr. (AMNH). NEW SYNONYMY.
Biology.—Hicks, 1926, Colo. Univ. Studies, 15:248-249.
Geographic range.—Northwest Canada south through 'Jr.* Pacific, Great Basin, and Rocky Mountain states to New Mexico, Arizona, and southern California.
California records.—ALPINE Co.: Ebbett's Pass, 1 3, VII-30-59 (L. Campos, UCD). EL DORADO Co.: Fallen Leaf Lake, 1 3,1 9, VII-19-20 (I. McCracken, CIS). FRESNO CO.: Florence Lake, 1 9, VIII-29-52 (E. Schlinger, UCD). INYO Co.: Mono Pass, 12,000 ft, 3 3,2 9, VIII-13-57 (J. Powell, CIS). Wyman Canyon, White Mts., 1 3,3 9, VI-21-61 (J. Buckett, D. Miller, UCD). Los ANGELES CO.: Big Pine Camp, 1 3, VII—13—27, on Epilobium adenocaulum var. Parishii (P. Timberlake, UCR); 2 3,1 9, VII-11-27, on Lotus Davidsonii (P. Timberlake, UCR). MONO CO.: Blanco's Corral, White Mts., 7 3, 10 9, VII-8 to 23 (J. MacSwain, CIS). Blue Canyon, Sonora Pass, 3 3,1 9, VIII-30-60 (C. Toschi, CIS). Convict Lake, 1 3, VIII-6-38 (R. fie G. Bohart, UCR). Cottonwood Creek, 9,300 ft., VII-10-61 (G. Stage, CIS). Crooked Creek Lab., White Mts., 1 9, VII-21-61 (P. Hurd, CIS). Fales Hot Springs, 1 3, VIII-18-60 (G. Colliyen, CIS). Gem Lake, 1 3,1 9, VII-24-15 (CIS). Leavitt Meadows, 1 9, VI-23-51 (J. MacSwain, CIS). McKay Creek, Sonora Pass, 2 3, 2 9, VIII-18-60 (E. Jesson, CIS). Schulman Grove, White Mts., 1 9, VII-6-61 (G. Stage, CIS). Sonora Pass, 2 9, VIII-10-60 (C. Toschi, CIS). RIVERSIDE CO.: Herkey Creek, 1 9, VI-24-34 (K. McCracken, CAS). SAN BERNARDINO CO.: Big Bear Valley, 38 3, 22 9, VII-7-34, on Lotus argophyllus (P. Timberlake, UCR); 2 3,19, VIII-11-33, on Aster (P. Timberlake, UCR); 2 9, VII-4-35, on Phacelia heterophylla, Lupinus conlertus (P. Timberlake, UCR); 1 3, VII-4-35, on Solidago confinis (P. Timberlake, UCR). Dollar Lake Trail, San Bernardino Mts., 1 3, 1 9, VIII-10-56 (R. Bohart, H. Moffitt, UCD). SHASTA CO.: Lassen Pass, 7500 ft., 1 3,1 9, VII-18-49 (C. Smith, W. Wade, CIS). SIERRA CO.: Gold Lake, 1 3,1 9, VII-16-21 (E. Van Dyke, CAS). SISKIYOU Co.: Summit Lake, Marble Mts., 3 3,2 9, VIII-24-62 (E. Mezger, UCD). TUOLUMNE Co.: Blue Canyon, Sonora Pass, 3 3, VIII-30-60 (M. Irwin, UCD). Chipmunk Flat, 4 3, 2 9, VIII-9-60 (J. MacSwain, CIS; M. Irwin, UCD). Sonora Pass, 1 3,1 9, VIII-15-59, on Aster ioliaceous (R. Snelling, G. Stage, SS).
This species is rather difficult to distinguish from the closely related emarginatum. Males of both species have a large blackish setal brush, sternum VI (figs. 32, 35) with the lateral and median lobes longer than wide, and tergum VII (figs. 31, 34) with rather broad lateral lobes. However, tenuiflorae males usually have the lateral lobes of tergum VII much broader than in emarginatum. Additionally, the me¬dial lobe of sternum VI is usually weakly emarginate in tenuiflorae (versus entire in emarginatum'), and the apex of sternum VIII (fig. 33) is relatively nar¬rower in tenuiflorae. The females of tenuiflorae usually have the sting emargination either absent or weakly developed; however, this character shows some variation. Additionally, in contrast to emargina¬tum, the female clypeus of tenuiflorae is flatter in profile (figs. 95 and 96). This character is also sub¬ject to variation.
A. tenuiflorae is found at the higher elevations of California's major mountain ranges but is absent in the Coast Range. Its markings are cream colored in
northern California, but they become more yellowish in the mountains of southern California.
A few observations on the habits of this species were contributed by Hicks (1926a) who studied it in Colorado. He observed the females carrying peb¬bles and found a nest which had been constructed between two rocks which, typical for the genus, was richly embellished with down.
The records taken from an examination of 112 males and 145 females showed a relatively few plant associations to be scattered in four families with no discernible preference indicated.