Differentiation of larvae and pupae of aquatic genera of Nearctic Hemerodromiinae (Diptera: Empididae) Author Brammer, Colin A. Author Harkrider, Robert Author Macdonald, John F. text Zootaxa 2009 2069 59 68 journal article 41136 10.5281/zenodo.187072 1b8f65fd-4b4f-432b-9103-7b5bb7978733 1175-5326 187072 Key to genera of aquatic larvae of Nearctic Hemerodromiinae 1 Terminal abdominal segment ending in a pair of prominent, divided apical lobes; terminal pair of prolegs at least 2 x longer than preceding 6 pairs ( Figs. 1 a, 1b) ............................................................................ Hemerodromia Meigen - Terminal abdominal segment lacking apical lobes; terminal pair of prolegs 1.5– 2 x longer than preceding 4 pairs (anterior 2 pairs may be shorter yet) ( Figs. 2–4 ) ......................................................................................................... 2 2 Body robust, prolegs long and robust ( Fig. 2 a), crochets prominent relative to couplet 2- below (see description for actual measurements and ratios); terminal abdominal segment ending in two very small, but distinctly separated processes, each of which bears a pair of setae ( Fig. 2 b) ................................................................... Neoplasta Coquillett - Body slender, prolegs short and slender ( Figs. 3 a, 4a), crochets less prominent relative to couplet 2 above (see description for actual measurements and ratios); terminal abdominal segment ending in two pairs of setae that do not arise from distinctly divided processes ( Fig. 3 b, 4b) .................................................................................................... 3 3 Setae on terminal abdominal segment and longitudinal cuticular striations strongly developed relative to couplet 3- below (see diagnosis section for explanation and interpretation) ( Fig. 3 a) ................................... Chelifera Macquart - Setae on terminal abdominal segment and longitudinal cuticular striations weakly developed relative to couplet 3 above (see diagnosis section for explanation and interpretation) ( Fig. 4 a) ................................ Metachela Coquillett