Tephrochlamys, : Aldrich & Darlington, 1908

Zeng, Wei, Xu, Xingnong & Yang, Ding, 2023, Subfamily Heteromyzinae newly recorded from China with description of one new species (Diptera: Heleomyzidae), Zootaxa 5264 (2), pp. 293-298 : 295

An Updated Key to Palaearctic species of Tephrochlamys

(modified from Okadome, 1997)

1. Anterior orbital bristle very weak.............................................................. T. steniusi Frey

- Anterior orbital bristle normal........................................................................... 2

2. Wings with brownish tinge, distinctly clouded along costal vein................................ T. japonica Okadome

- Wings hyaline, not clouded along costal vein............................................................... 3

3. Face very short and concave; edge of mouth raised above oral vibrissal axis; male anterior tarsus broadened................................................................................................ T. tarsalis (Zetterstedt)

- Face, edge of mouth and male anterior tarsus not so described above............................................. 4

4. First dorsocentral bristle closer to 2 nd dorsocentral bristle than to suture......................... T. flavipes (Zetterstedt)

- First dorsocentral bristle closer to suture than to 2 nd dorsocentral bristle.......................................... 5

5. First dorsocentral bristle shorter than posterior dorsocentral bristle.............................................. 6

- First dorsocentral bristle as long as posterior dorsocentral bristle................................................ 7

6. Body length 3.5–4.0 mm; hairs between postsutural dorsocentral in four rows........................ T. laeta (Meigen)

- Body length 7.0– 7.2 mm; hairs between postsutural dorsocentral in six rows.......... Tephrochlamys qinghaiensis sp. nov.

7. Acrostichal hairs in four rows; third antennal segment yellowish brown; costal spines inconspicuous... T. ezoensis Okadome

- Acrostichal hairs more than four rows; third antennal segment reddish brown; costal spines short, but conspicuous........................................................................................... T. rufiventris (Meigen)