Habrophfebia modesta Hágen. 



(Fig. 1. a, b, b, c, d, e, f i.) 



The nymph is 8 — JO inin long and 1"5 — 2 mm broad. Cerci mea- 

 sure 4 — 6 mm. 



The whole body is iiniformely chestnut-coloured. Legs and cerci 

 pale. Body slender, scarcely depresser, widest across the mesothorax, 

 smooth and polish. (Fig. 1. a.) 



The motion-manner is snake-like because the legs are short 

 and weak. 



Head four square, eyes rather small, situated just beiore the 

 hind angles of the head. Antennae rather short measure ^3 of the 

 body. 



Abdomen very slender, depressed without increasing in broad. 

 Gills present on segments 1—7, double, similar or slightly longer 

 on the middle segments, divided in first third of their lenghth into 

 two long, slender, simple tapering filaments. (Fig. 1. b, hi.) 



Cerci very slender, every segment on distal end with a crown 

 of short, fine hairs. Only the three basal segments are without them. 

 (Fig. 1. c.) 



Mouth parts very similar to these of llabrophlehia fiisca. I find 

 it superfluous to describe them nearer because the adjointed figures 

 demonsrate it sufficientely. (Fig. 1. d, e, r, i.) Especially the hypo- 

 pharynx (Fig. 1. f) shows evidentely the relationship between both 

 species. 



The nymph Jives in all brooks and rivulets with clear water 

 and stony ground. 



Leptophlebia subraarginata Steph. 

 (Fig. 2. a. b, c, d, e, f.) 



Length of body 10 — 12 mm, broad 2 — 2-5. Cerci nearly as long 

 «s the body. Legs rather high, stronger. The nymph speeds witb 

 softly elevated body. 



The colour is a combination of pale brown with dark gray 

 spots on the dorsal side of the head and abdomen. (Fig. 2. a.) 

 Below uniformly pale, antennae and legs rather yellow. 



80 



