Tritoxa, Loew, 1873

Sinclair, Bradley J., Macleod, Alyssa M. & Wheeler, Terry A., 2021, Revision of the Nearctic genus Tritoxa Loew (Diptera: Ulidiidae), Zootaxa 4920 (3), pp. 359-379 : 377-378

Tritoxa sp.

( Figs 13 , 24 )

Material examined. USA. California: Inyo Co., Deep Springs [37°22′N 117°59′W], Malaise trap 9A-3P, 24/ 25. v.1974, J. Slansky and M. Wasbauer (1♀, CSCA) ; Mono Co., Rock Ck Cpgd [37°28′N 118°43′W], 4.vii.1967, P.H. Arnaud (1♀, CAS) . Nevada: Lyon Co., 7 mi NW Wellington [38°45′N 119°22′W], Malaise trap 8A-12M, 28.v.1974, M. Wasbauer, J. Slanksy (2♀, CSCA) .

Diagnosis. This species has the general appearance of Tritoxa cuneata , but is distinguished by wider silvery parafrontal microtrichose stripe together with the discal hyaline crossband extending beyond cell dm, nearly reaching the wing margin ( Fig. 13 ).

Distribution. This unnamed species is known from Inyo and Mono counties in California and Lyon County in Nevada ( Fig. 24 ).

Remarks. This species is known only from four female specimens. Males are required to confirm its species status through the comparison of the male terminalia.

Figures

FIGURES 6–13. Wings of Tritoxa species. 6. T. californica sp. nov.; 7. T. cuneata; 8. T. decipiens sp. nov.; 9. T. flexa; 10. T. incurva; 11. T. pollinosa; 12. T. ra; 13. Tritoxa sp. Abbreviations: d bd—discal band; dm—discal medial cell; dm-m—discal medial crossvein; r-m—radial medial crossvein; sbap bd—subapical band; sbb bd—subbasal band.

FIGURES 24–26. Distribution of Tritoxa species. 24. T. californica sp. nov. (incl. unconfirmed records (red open circles)) and Tritoxa sp.; 25. T. decipiens sp. nov.; 26. T. cuneata and T. flexa.