| OCR Text |
Show 50 14. (B) Gills on segment Gills on similar 15. (14) Gills pads gills (15) 1-5 .•.. 0 ••••••••.• 1-5 bilamellate Each Each lamella of 0 1. 0 0 () 0 0 0 as (9) Fig. 61 in With only With (19) .. ,. (Figs. "00 .••••••••••••••••• First • hind 1,55,60·);- o •••••••••••• 0 with 0 terminates 60) ....•..•• the middle, 0 • 0 0 fringed 4' ... 0 0 0 0 • 0 shaped 0 0 0 0 0 0 0 in 0 0 and ., 0 GI ., 0 0 0 0 II e CJ • caudal filaments, (9) vestigial •••••••.••••..•..••• Gills 0 ••••• of pair body gills greatly enlarged, of nymph ..•••..•.•.....•. all on abdominal tubercles typically present, present tergum (Figs. *See descriptions and Homothraulus if mid-dorsal on for I on • Epeorus 20 Rhithrogena as not Heptagenia segments 1-5 only; segments abdominal not9 then line of 30, 31).04.0 differences aly. , ....••••••.•.••..••..•....• last present Th rau 1 cd e s filaments, the median developedo well beneath mid-dorsal Hermanella the median .••..•.•.••..•.....•..•.••. 21. Traverella in as 0 o.1B apical margin, shaped Homothraulus Homothraulus-ally* near last middle 17 a •••••••••••••• pairs of gills not as large ones; gills directed laterally; beneath body converging First 16 mar- •••••••••••••••••••••••••••••• (Fig. caudal converging ••••••••••. .•••••••••.•. gills 1-5 filament and Hagenu lops is .•.•••••••••.•• two three caudal 20. '0,. gills 1-5 filament caudal Choroterpes greatly elongated, apical posterior margin of labrum in 0 Labrum widest 19. not •••.••••.••.•....•.••.•••••. ••••• lamella of Labrum widest Fig 15 not to slender filament (16) 50), Maxillary palpi greatly elongated, apical tip extending to at least anterior margin of labrum gns (Fig. 551 lB. ....•...•...••.....••..••••••••••••• deeply forked (Fig. 45); hind wing tip extending (16) to .••....•••.••.•. Maxillary palpi 17. shape one lanceolate (Fig. middle abdominal gills wing pads present 16. in segment to absent Gills similar one middle abdominal tufts of setae each abdominal •••••••••••• between the 0 ••••••••••••• nymphs Baetodes of Homothraulus |
