Notes on Canadian Ablabesmyia Johannsen, with keys to known Nearctic immatures of the genus (Diptera: Chironomidae) Author Saether, Ole A. text Zootaxa 2011 3069 43 62 journal article 46098 10.5281/zenodo.279010 afe53636-11b6-4d68-8a12-407eabb87fd1 1175-5326 279010 Key to known Nearctic pupae of Ablabesmyia 1. Respiratory duct opens laterally ¼ from apex of thoracic horn ( Fig. 2 G); shagreen on tergites multibranched spinulae; all Lsetae of VII placed distinctly in posterior half.......................................... A. (Asayia) annulata (Say) - Respiratory duct opens near apex; anal lobe at most with 16 spinules distad of distal setae and 5 on basal margin; at least L1 at, anterior of, or slightly posterior of centre of VII............................................................. 2 2. Respiratory duct and apical papilla more than 1/2 as long as thoracic horn................. A. (Karelia) peleensis (Walley) - Respiratory duct and apical papilla not more than 1/10 as long as thoracic horn..................................... 3 3. Wing sheath with numerous freckle-like dots............................................ A. (Karelia) idei (Walley) - Wing sheath without freckle-like dots...................................................................... 4 4. Apex of respiratory duct is a rounded "T" ( Fig. 2 A–C)........................................................ 2 - Apex of respiratory club- or cone-shaped ( Fig. 2 D–G)........................................................ 7 5.. Frontal apotome T-shaped ( Roback 1985 fig. 287 ); wing sheath uniformly pigmented; thoracic comb ( Fig. 2 B) consisting of 13–18 apically pointed 35–40 µm long spines; exuviae 5.7–6.9 mm long........ A. (Karelia) philosphagnos Beck et Beck - Frontal apotome dome-shaped ( Roback 1985 figs 288–298 ); wing pad clear or with faint wing pattern.................. 5 6. Wing pad with faint wing pattern; thoracic comb ( Fig. 2 A) consisting of about 13–16 larger and10 minute spines.................................................................................... A. (Karelia) illinoensis (Malloch) - Wing pad clear; thoracic comb ( Fig. 2 B) consisting of 12–15 apically rounded, 72–115 µm long spines and a few smaller ones..................................................................... A. (Karelia) pulchripennis (Lundbeck) 7. Wing sheath with large dark maculae in area of basal veins R/M and anal vein ( Caldwell 1993, fig. 8 )............................................................................................. A. (Karelia) cinctipes (Johannsen) - Wing sheath not as above, mostly showing vein pattern........................................................ 8 8. Wing sheath mostly uniformly pigmented with irregular clear maculae distributed near the margins, cross vein distinctly dark- ened, surrounded by a clear area, no indication of a vein pattern; cephalothorax mostly clear; abdominal segments II–V ante- rior margins pale, conjunctives laterally with distinct brown spot; respiratory duct S-shaped ( Fig. 2 E), genital sac of male 0.65–0.75 times as long as anal lobe ( Fig. 3 E)............................................ A. (A.) basalis (Walley) - Wing sheath with brownish wing pattern; cephalothorax with a darkened pattern; abdominal segments II–V with dark anterior margins; conjunctives without dark spot, if darkened then more diffused towards the middle; respiratory duct straight or U- shaped ( Fig. 2 D, F), genital sac 0.65–0.85 times as long as anal lobe............................................. 9 9. Wing sheath with vein pattern mostly obscured by pale and dark maculae, only R and M1+2 relatively distinct distally; abdomen with weak pattern................................................................ A. (A.) hauberi Beck et Beck - Wing sheath with distinct vein pattern, with or without dark maculae............................................ 10 10. Wing sheath with veins terminating before the margin........................................................ 11 - Wing sheath with veins connecting to brownish margin....................................................... 12 11. Both L1 and L2 of VII situated in anterior half........................................... A. (A.) parajanta Roback - At most L1 of VII in anterior half.................................... A. (A.) rhamphe Sublette , A. (A.) janta Roback 12. Veins of wing sheaths strong and broad, base of vein M may be absent...................... A. (A.) monilis auct. nec L. - Veins of wing sheaths more faint, vein M generally complete.................................................. 13 13. Wing sheaths with spots in addition to veins............................................................... 14 - Wing sheaths with only veins........................................................... A. (A.) aspera Roback 14. Abdominal segment IV with strong pattern, lateral lines of pigment distinct; thoracic comb ( Fig. 2 D) with 12–17 spines, the longest mostly shorter than 60 µm, occasionally with a number of additional minute spines; genital sac of male 0.75–0.85 times as long as anal lobe............................................................ A. (A.) mallochi (Walley) - Abdominal segment IV unmarked; thoracic comb with 9–10 spines; genital sac of male 0.74 times as long as anal lobe....................................................................................... A. (A.) simpsoni Roback