THE IMMATURE STATE OF THE ODONATA. 19 
inferiors longest, lateral superiors two thirds the length of middle, middle 
nearly or quite straight at tip. Male projection stout, blunt, triangular, 
angular, half length of lateral superior appendages. Female ventral valve 
reaches end of segment. The described nymphx are the types of Hagen 
Stettin Zeit. XIV. p. 267. Brauer, Neuropt. Austr. p. xvi. 
fi. De Geerii Dufour, Ann. se. nat. ser. 3, XVII. p. 69, pl. 3, fig. 3, is 
apparently this species. L. Dufour has overlooked the small lateral spine on 
segment 6. 
10. ASCHNA GRANDIS. 
Puate II. Fie. 1. 
Linneus. Selys, Revue des Odonates, p. 131. 
Nympha skins. Length, 44mm; breadth, 9mm. Locality, Lueneburg, 
Mr. Heyer; Koenigsberg, Hagen. 
Dr. Hagen observed the transformation of this species more than thirty 
years ago. The specimens are, however, no longer in his collection. A 
large number of nympha skins sent him by M. Heyer, unassorted, as Al. 
grandis and Ad. viridis, were easily distinguishable as two species, but it 
could not be determined which were AZ. grandis and which Ai. viridis. Two 
specimens, both labelled A%. viridis, pinned during transformation, were sent 
by M. Heyer; but of these one has only the head developed, and the other 
the parts only as far as the metathorax ; and, as the color and shape are not 
fully shown, they can neither of them be considered as fully determined. 
These latter specimens, seeming probably As. viridis, Dr. Hagen refers the 
other nympha skins, which were sent before and were similar, to AS. viridis ; 
those dissimilar to Al. grandis. 
Very similar to AZ. rufescens; hind angles of occiput more sloping, line 
back of eyes more curved, palpus more convex and narrower. — Processes 
different, of equal length, more widely separated, anterior thinner, somewhat 
bent outward at tip. Appendages different; middle shorter in proportion to 
inferiors than in A%. rufescens. Lateral superiors about one half length of 
middle. Male projection shorter, tip sharper. This species is more brightly 
colored than 44. rufescens. Abdomen brownish, dorsal band broad and dark, 
divided by a light median line. The nymph described are the types of 
Hagen, Stettin Zeit. XIV. p. 268, and F. Brauer. Neur. Austr. p. xvi. 
Miss Olga Poljetajewa has raised this species, and fully described the 
nympha in Hore Ross, St. Petersburg. 1879, 5, p. 15. The description 
confirms the identity with the above-described nymph. 
