THE IMMATURE STATE OF THE ODOXATA. 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 nympha^ are the types of Hagen 

 Stettin Zeit. XIV. p. 267. Brauer, Neuropt. Austr. p. xvi. 



JE. De Geerii Dufour, Ann. se. nat. ser. 3, XYII. p. 09, pi. 3, fig. 3, is 

 apparently this species. L. Dufour has overlooked the small lateral spine on 

 segment 6. 



10. ^SCHNA GRANDIS. 



Plate II. Fig. 1. 



LiniicTus. Selys, Eevue des Odonates, p. 131. 



Nympha skins. Length, 44 mm ; breadth, 9 mm. 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, imassorted, as JE. 

 grandis and JE. viridis, were easily distinguishable as two species, but it 

 could not be determined which were JE. grandis and which JE. viridis. Two 

 specimens, both labelled JE. 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 JE. viridi.s. Dr. Hagen refers the 

 other nympha skins, whi<'h were sent before and were similar, to ^E. viridis ; 

 those dissimilar to ^. grandis. 



Very similar to JE. rufescens ; hind angles of occiput more sloping, line 

 ])ack 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 JE. rufescens. Lateral superiors about one half length of 

 middle. Male projection shorter, tip sharper. This species is more brightly 

 colored than JE. rufescens. Abdomen brownish, dorsal band broad and dark, 

 divided by a light median line. The nympha^ described are the t^yjies of 

 Hagen, Stettin Zeit. XIV. p. 2G8, and F. Brauer. Neur. Austr. p. xvi. 



Miss Olga Poljetajewa has raised this species, and fully described the 

 nympha in Horne Boss, St. Petersburg. 1879, 5, p. 15. The description 

 confirms the identity with the above-described nymphai. 



