| OCR Text |
Show 48 Nymphs 1. Gills the or in abdominal on segments 2-7 forked and with margins fringed, gills on segment one variable absent; mandibular tusks present and projecting font of head (Fgsel?, 14)"'!Q ••• Gills abdominal on segments variable, not present0 above; mandibular tusks 2" (1) Gills flattened 3. (2) fore 11) edge of legs projected (Fig. 5), marg in .•• a 0 •• The apex of o 0 0 the ., 0 Fore • 0 4> 0 0 0 0 • 0 0 wi th legs femora and 0 •• e ••••• such 0 II • " • 0 of 0 • 0' .... fit • dense a 0 " 0 0 ••• 0 •••• •••. birs, Gills to 6. (4) 0 •.. 0 •.... 0 ..•... the point apical , Hexageni.;i. • 0 " aboveooo.oo " 0 .•• 11 the on •.••••.•..•...•.... 00 .. 5 or aboveoo.ooo.oo.Qo as o. "POL YMITARC IDAE, •• oooo6 one sgment 2-70 4 0.0.3 12 0 segments on ••••.• ventral, the portlon enlarged (Figo 23). oOLIGONEURIIDAE, abdominat on those such 9sment abdominat on fibril1iform Gills affinge in not 0 EUTHYPLOCIIDAE,10 Fre legs usually with only scattered spines but •. EPHEMElDAE; as 0 hairs fringe col (Figs. 8,33) tibiae " o legs rounded, spines " 02 ..• o for ••. the on •..••..•• the hind row 0 e •.. as apex of the tibiae of into a distinct acute tibiae of no e o.o tibiae , •....•..••••.•. spines present ..••.. projected; not of row f os sor La l legs (Figso 4, The ventral hind not .. GiL'-1s dorsal; •••• •••••• lateral; the fore legs not adapted tibiae cylindrical (Fig. 20) digging, o dorsal, similar oSIPHLONURIDAE, Isonychia one •.•.. ., ... segment two operculate, quadrate meet nearly meeting at the midline of the ing CAENIDAE, Caenis bdomen Gills on or .••••••••.••...•.• o.o ••.. o ••..•• o ••.• ,1 " Gi!l1s tey mtdd 1 eo 7. (6) Gills .. triangular 18 " or 1." 7 0 0 absent abdominal Gills 0 " 0 • " 0 " " , on " • " CO" 0 " 0 fit 0 2-;6 •• II 0 " " " 0 0110 0 .. • " " 0 " operculate, meeting at not 18 e 0 0 10 0 0 " 0 " 0 ••• 0 0 0 0 G " " 0 " 0 gOO" " " 0 " • " 0 0 0 0 0 0 0 0 0 0 • 7 on •..••. 13 TRICORYTHIDAE, 1-6, segments 1-5, 0 " gills present •.•••. abdominal •• " one; 0.0.0 if and oval or segment on t.e r'g a present 0 lit Variable, two segment on are iii 0 " " " Q 0 " " 0 0 " 0 0 " e " 0 0 8 |
