Triepeolus utahensis (Cockerell)

(Figs. 4, 7, 8; Rightmyer 2008: 70–71; Figs. 88, 89)

Epeolus utahensis Cockerell 1921: 15 –16 [Holotype: American Museum of Natural History No. 25112; ♂, Huntsville (near Ogden, Weber Co.), Utah; July 26 1920; about 41˚ 17’N, 110˚ 46’W]; Rightmyer 2008: 70 [synonymy under T. heterurus].

Epeolus heterurus Cockerell & Sandhouse 1924: 316 –317 [Holotype: California Academy of Sciences No. 1611; ♀, Redding (Shasta Co.), California; July 6 1918.

Epeolus piscatoris Cockerell 1939: 432 –433 [Holotype: California Academy of Sciences No. 6652; ♀, Fisherman’s Cove, Santa Catalina Island, California; June 9 1933; Sinapis]; Rust 1984: 120 [synonymy with T. heterurus].

Triepeolus piscatoris (Cockerell); Brumley 1965: 73.

Description. Length ca. 7–9 mm; ITW 1.3–1.9 mm. Integument black, with red on part of mandible; dorsally with bands of setae pale yellow. Clypeus lacking midline and larger punctures, sometimes covered with diffuse, pale setae. Mesepisternum with dorsal half covered with white, suberect to erect branched setae, anterior margin with sparse, erect, simple setae, ventral half with punctures nearly contiguous, often covered with diffuse, brown, branched setae (females), or covered with erect to suberect, dense, white, branched setae (males). Paramedian bands distinct (some females), or contiguous with pale setae on anterior margin of scutum (males and most females). Scutellum with dorsal biconvexities weakly pronounced, axillar spines triangular, reaching or not reaching midpoint of scutellum. T1 interspace subovate to subquadrate; T2 with lateral, longitudinal band of pale setae forming acute angle with apical, transverse band of pale setae. Female: Pseudopygidial area with long setae, parted medially and directed laterally to posterolaterally at approximately 45 degree angle, apical margin concave; S5 slightly downcurved at apical margin. Male: Pygidial plate very narrow and long, apparently lacking transverse basal ridge; S2–S3 with apical bands of white setae (S3 with white setae slightly extended past apical margin); S4–S5 with brown apical fringes (S4 rarely with slight whitish tinge on apical fringe).

Distribution. MEXICO: Baja California; USA: California, Idaho, Nevada, Oregon, Utah, Wyoming.

Floral Records. Chrysothamnus Nutt. sp. (Asteraceae), Eriogonum Michx. sp. Grindelia camporum Greene (Asteraceae), Centromadia pungens Greene (Asteraceae), Mentha spicata L. (Lamiaceae), Sinapis L. (Brassicaceae) sp., Solidago californica Nutt. (Asteraceae), Wislizenia refracta Engelm. (Capparaceae).

Seasonal Records. 10 May to 16 October.

Specimens examined. 68♀, 91♂ (AMNH, BLCU, CAS, EMEC, FSCA, INHS, LACM, OSAC, SDMC, SEMC, UCDC, UCMC, USNM, ZRC).