Hydrosmittia, Ferrington Jr & Saether, 2011

Ferrington Jr, Leonard C. & Saether, Ole A., 2011, A revision of the genera Pseudosmittia Edwards, 1932, Allocladius Kieffer, 1913, and Hydrosmittia gen. n. (Diptera: Chironomidae, Orthocladiinae) 2849, Zootaxa 2849 (1), pp. 1-314 : 106

Key to known female imagines of Hydrosmittia gen. n.

1. Costa proximal to apex of R 4+5 with 0–5 non-marginal setae.................................................... 2

– Costa proximal to R 4+5 with 17–42 non-marginal setae............................................................ 4

2. Inner vertical setae absent, LR 1 0.38–0.39................................ H. ruttneri Strenzke et Thienemann (p. 129)

– Inner vertical setae present, LR 1 0.44–0.48...................................................................... 3

3. Inner vertical setae conspicuous, the longest 32–48 µm long; seminal capsules with fine microtrichia............................................................................................... H. oxoniana (Edwards) (p. 120)

– Inner vertical setae inconspicuous, less than 15 µm long; seminal capsules with or without distinct microtrichia........... 4

4. Seminal capsules with dark microtrichia; costa proximal to apex of R 4+5 with 17–23 non-marginal setae; Holarctic......................................................................................... H. virgo Strenzke (p. 126)

– Seminal capsules apparently without microtrichia; costa proximal to apex of R 4+5 with 21–42 setae; Holarctic.......................................................................................... H. montana Strenzke (p. 118)