20 THE IxMMATURE STATE OF THE ODOXATA. 



11. ^SCHNA CYANEA. 



Plate IV. Fig. 3. 

 Miieller. Selys, Eevue des Odonate.?, p. 115. 



Nympha?, in alcohol and skin.s, male and female. Length, 48 mm.; 

 breadth, 9 mm. Locality, Vienna. Raised by F. Braner ; Lueneburg, i-aised 

 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, antennae, and mouth parts as in ^E. 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 boi'der. 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. Piotho- 

 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 tibise ringed with two darker bands. Thorax not very large ; wing cases 

 reaching fourth segment. Abdomen long, slender, enlarged gradually to 

 beyond the middle, thence tapering, grayish ; dorsal band dark, divided by 

 paler band ; a pale band on each side of dorsal band. Segments of aljout 

 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 superiprs 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 aj^pears, 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 nymphae described are types of Hagen, Stettin Zeit. XIV. p. 266 ; 

 and F. Brauer, Neur. Austr. p. xvi. ^Eschna iunoniinata, Dufour, Ann. se. 

 nat. ser. 3, XVII. p. 69, pi. 3, f. 5, is apparently JE. cyanea. 



