oo THE IMMATURE STATE OF THE ODONATA. 
Similar to 42. cyanea. Body shorter, and stouter in proportion. _ Head 
flatter. Eyes larger and more prominent, separated from occiput by nearly 
straight line. Vertex more in the same plane with the eyes. Occiput 
shorter and straighter behind. Bands on hind angles less marked; color 
vrayish; a pale elongated spot on each side of median line, and a narrow 
pale band on hind angle, often scarcely discernible. Mask long, extending 
through middle legs, gradually enlarged; front border a little more than 
twice width of base; middle third of front border somewhat produced and 
rather widely cleft, with comb of hairs. Palpus broad. rounded at upper 
angle, and produced in very short black teeth at lower angles; denticulation 
beneath discernible; movable hook, reaching the base of opposite one. 
Prothorax as broad as back part of occiput, rounded behind. Processes 
stout and blunt, not much separated, anterior more contracted. Legs very 
slender; hind legs extending to ninth segment, ash-gray ; femora with two 
pale rings. Wing cases extending to middle of fifth segment. Abdomen 
short, stout, tapermg from seventh segment; dorsum very convex; finely 
granulated as in AM. cyanea, but with whitish hairs; color grayish; each seg- 
ment with eight darker impressed spots, four on middle and two on each 
side near margin. Segments of nearly equal length, except tenth, which is 
half as long; lateral spines on segments six to nine; that of ninth nearly 
as long as tenth segment. Inferior appendages as long as two last segments, 
triangular, sharp; middle appendage notched, not so long as inferiors; lat- 
eral superiors rather more than half length of middle one, cylindrical, slen- 
der, and sharp. Male projection conical, rather sharp, nearly as long as lateral 
superiors. Male genital parts slightly marked ; female valve extending some- 
what beyond ninth segment. 
15. ASCHNA AFFINIS. 
Puate V. Fie. 3. 
Vander Linden; Selys, Revue des Odonates, p. 124. 
Nympha, male, raised by F, Brauer. Length, 33 mm.; breadth, 7 mm, 
Locality, Vienna. 
Similar to 44. mixta. More slender in proportion. Eyes not so large or 
prominent. Occiput more rounded. Mask shorter and broader in propor- 
tion, extending through middle legs, enlarged gradually forward, so that 
front border is twice as broad as base; middle third not so produced as in 
AX. mixta, and finely cleft, with a comb of hairs. Palpus broad and straight 
