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Andrena crudeni LaBerge, 1971
Life   Insecta   Hymenoptera   Apoidea   Andrenidae   Andrena
Subgenus: Nemandrena


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Reprinted with permission of the Pan-Pacific Entomologist from: LaBerge, W. E. 1971a. A new subgenus of Andrena found in California and Oregon (Hymenoptera: Apoidea). Pan-Pacific Entomologist 47: 47-57.

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Andrena crudeni is almost indistinguishable from A. torulosa except for the fact that A. crudeni lacks completely the pronotal humeral angle and ridge in both sexes.

FEMALE. MEASUREMENTS AND RATIOS. N = 20; length, 9-12 mm; width, 2.5-4.0 mm; wing length, M = 3.61 0.102 mm; FL/FW, M = = 0.86 0.003; FOVL/FOVW, M = 3.22 0.072.

INTEGUMENTAL COLOR. As in A. torulosa.

STRUCTURE. Structure and sculpture of head as in A. torulosa except as follows: maxillary palpus with segmental ratio about 1.0:1.0:0.7:0.7:0.6:0.4; labial palpus with ratio about 1.0:0.6:0.4:0.6. Thoracic and metasomal sculpture and structure as in A. torulosa except pronotum completely lacks humeral angle and dorsoventral ridge, laterally pronotum rather evenly and finely tessellate.

VESTITURE. As in torulosa but head with vertex and along inner margins compound eyes usually with abundant reddish-brown hairs.

MALE. MEASUREMENTS AND RATIOS. N = 9; length, 8-10 mm; width, 2.0-2.5 mm; wing length, M = 3.32 0.229 mm; FL/FW, M = 0.80 0.008; FS1/FS2, M = 2.37 0.087.

INTEGUMENTAL COLOR. As in A. torulosa.

STRUCTURE. Structure and sculpture of head as in torulosa except as follows: maxillary palpus with segmental ratio about 1.0:1.0:1.0:0.9:0.7:0.6; labial palpus with ratio about 1.0:0.5:0.4:0.4. Thoracic and metasomal structure and sculpturing as in A, torulosa except as follows: pronotum completely lacks humeral angle and dorsoventral ridge, surface finely and regularly tessellate; terminalia as figured: (Figs. 6-10), note apical process gonocoxite longer, less falcate; sternum 7 broader at apex; shape of volsellae; sternum 8 lacking short stout hairs medially.

VESTITURE. As in A. torulosa.

Names
Scientific source:

Supported by

Hosts · map
FamilyScientific name @ source (records)
Boraginaceae  Nemophila menziesii @ UCRC_ENT (1); BMEC_ENT (1)
Hydrophyllaceae  Nemophila sp @ BBSL (21)
Ranunculaceae  Ranunculus @ BMEC_ENT (2)
_  Withheld @ BBSL__YOSE (169); BBSL (49); BBSL__PINN (168)

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Updated: 2021-05-12 02:40:17 gmt
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