20 THE IMMATURE STATE OF THE ODONATA. 
1l. ZASCHNA CYANEA. 
Prats IV. Fie. 3. 
Mueller. Selys, Revue des Odonates, p. 115. 
Nymph, in alcohol and skins, male and female. Length, 48 mm. ; 
breadth, 9mm. Locality, Vienna. Raised by F. Brauer ; Lueneburg, raised 
by M. Heyer; raised by Prof. Rosenhauer, Erlangen, Bavaria. 
Body elongated and slender. Head large, flat, narrow behind. Eyes 
large, prominent, globular, occupying half the head; inner hind angles much 
produced, Line between occiput and eyes curved. Sides of head oblique, 
hind angles rounded. Occiput notched; on each side of median line a pol- 
ished spot, on upper side of hind angles polished bands separated by rough- 
ened lines. Vertex, antenns, and mouth parts as in Ai. rufescens. Head 
grayish, with paler band at sides ; a pale spot on each side the median line 
of occiput. Mask extending between the middle legs; narrow at base, one 
half width of front border. Middle third of front border somewhat pro- 
duced, at very obtuse angle, cleft with a comb of hairs. Palpi meeting 
broad, cut straight at ends, and produced very slightly into end hooks, 
Movable hooks sharp and thin, reaching base of the opposite one. Protho- 
rax small, as broad as back part of occiput, ash gray at each side, pale at 
border. Processes short, scabrous, enclosing a little more than a right angle ; 
anterior shortest ; legs slender, hind legs reaching eighth segment. Femora 
and tibix ringed with two darker bands. Thorax not very large ; wing cases 
reaching fourth segment. Abdomen long, slender, enlarged gradually te 
beyond the middle, thence tapering, grayish ; dorsal band dark, divided by 
paler band; a pale band on each side of dorsal band. Segments of about 
equal length, except tenth, which is shorter. Lateral spines on segment six 
to nine. Inferior appendages as long as two last segments, triangular, sharp : 
lateral superiors one half length of inferiors. Middle appendage notched ; 
male projection conical, rather enlarged at base, shorter than lateral appen- 
dages. The whole body finely granulated with what appears, when highly 
magnified, to be spines pointing backward, and with short yellow hairs 
inserted behind them. Genital parts of the male indicated, those of the 
female extending somewhat beyond the ninth segment. 
The nymph described are types of Hagen, Stettin Zeit. XIV. p. 266; 
and F. Brauer, Neur. Austr. p. xvi. %schna innominata, Dufour, Ann. se. 
nat. ser. 3, XVII. p. 69, pl. 3, f. 5, is apparently A. cyanea. 
