Empis (Enoplempis) arizonensis, Sinclair & Brooks & Cumming, 2025

Empis (Enoplempis) arizonensis sp. nov.

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( Figs 82–84 View FIGURES 82–90 , 93 View FIGURES 91–93 , 129 View FIGURES 129–130 )

Type material. HOLOTYPE ♂, labelled: “w295”; “U.S.A.: ARIZONA: WHITE / Mountains [33°54′N 109°33′W], subalpine/ meadow, A. R. Moldenke/ # refers to host & date/ CALIFORNIA ACADEMY OF/ SCIENCES COLLECTIONS”; “ HOLOTYPE / Empis (Enoplempis) / arizonensis Sinclair ,/ Brooks & Cumming [red label]” ( CAS) GoogleMaps . PARATYPES: USA. Arizona: Same as holotype except, w1969 (1♂, CAS) ; same data except, w294 (1♂, CAS) .

Diagnosis. This species is distinguished from other species of the E. (En.) canaster species group by single paint brush-like cluster of setae and inner, unmounted narrow cluster of setae on the male hind femur, paired digitiform basal processes of the male hind tibia, and length of dorsal setae of the male hind tibia subequal to width of tibia ( Figs 82–84 View FIGURES 82–90 ).

Description. Wing length 7.3–7.5 mm. Male. Similar to E. (En.) spokanensis sp. nov., except as follows: legs slender, yellowish brown, tarsi darker; coxae yellowish brown, partially clothed in thin greyish pruinescence ( Fig. 82 View FIGURES 82–90 ). Fore tarsomere 1 not inflated. Hind femur with anteroventral digitiform process, with paint brush-like setae in tight cluster; medially with unmounted narrow cluster of setae; 3 triangular posteroventral processes without setae; anterior process longest; preapical anterior seta strong, shorter than width of femur ( Figs 83, 84 View FIGURES 82–90 ). Hind tibia with pair of narrow digitiform processes on basal quarter; posteroventral process slightly twisted, with black setae along margins, with crown of tightly clustered, tapered setae, with knob-like, inner basal setose lobe; anteroventral process quadrate, with apex divided into 3 setal clusters, posteroventral cluster longer than length of process; posteroapical comb with seta; 4–6 strong anterodorsal and posterodorsal setae, not longer than width of tibia; ventral margin without dense, fine erect setae ( Figs 83, 84 View FIGURES 82–90 ). Hind tarsomere 1 not inflated, with long dorsal setae, similar to tibia.

Abdomen dark, with dense greyish pruinescence, concolourous with scutum; long, pale lateral setae on pregenital segments. Pregenital segments unmodified, except sclerites of segment 8 narrowly separated, weakly fused. Terminalia ( Fig. 93 View FIGURES 91–93 ): orange brown. Cercus short, rectangular; dorsal margin with broad notch at mid-length; apex with base produced posteriorly, rounded; setae longer than width of cercus; weakly fused anteriorly to epandrium. Subepandrium without process; with row of medium-length setae. Epandrial lamella oval, higher than long; posterior margin truncate, without projection, bearing long, slender setae along posterior margin. Hypandrium short, truncate; numerous strong setae of various lengths present. Phallus very narrow and tubular basally; expanded on basal half, tapered, slightly sinuous apically; apex emerging beyond cercus; apex not expanded; ejaculatory apodeme nearly as long as length of epandrium, Y-shaped, with ventrally positioned lateral apodemes.

Female. Unknown.

Geographical distribution and seasonal occurrence ( Fig. 129 View FIGURES 129–130 ). Empis (En.) arizonensis sp. nov. is only known from the type locality in the White Mountains of Arizona .

Etymology. This species is named after Arizona, the state in which the type locality occurs.

Nuptial gift presentation. Form unknown.