THE IMMATURE STATE OF THE ODONATA. 23 



at ends, and more nearly meeting than in JEi. mixta. Movable hooks as in 

 JEi. mixta. Prothorax similar to ^E. mixta. Processes blunt, depression be- 

 tween them very shallow, of nearly equal size. Abdomen more slender, 

 iron gray; the whole insect of this color; dorsal band darker, interrupted by 

 lighter spots. Lateral spines on segments five to nine, that on fifth very small. 

 Spine of ninth shorter than tenth segment. Finely granulated ; hairs pale, 

 and when present finer and shorter than in mixta. Appendages similar, 

 except lateral superiors, only half as long as middle one, somewhat longer 

 than male projection. The nympha described is the type of Hagen, Stettin 

 Zeit. XIV. p. 267 ; and F. Brauer, Neur. Austr. p. xvi. 



16. .ffiSCHNA EREMITICA. 



Plate II. Fig. 2. 

 Scudder, Proc. Boston N. H. Soc. XI. p. 213. 



Nymphae, male and female, skins, and some not full-grown, in alcohol. 

 Length, 39 to 47inin. ; breadth, lUmm. Locality, mouth of Red River of 

 the North; Hermite Lake, White Mountains, New Hampshire, Mr. Sanborn; 

 Minnesota. Coll. Mus. Comp. Zool. 



Similar in general shape to vE. rufescens. Head much larger, remark- 

 ably large in proportion. Eyes large and prominent. Occiput not very 

 deeply notched behind; sides oblique, and rounded at hind angles; three 

 polished spots on middle ; polished bands on hind angles. Antennae, third 

 joint nearly as long as first and second ; fourth, about one half third ; other, 

 somewhat longer. Mask broad, passing through middle legs, gradually en- 

 larged forAvard ; base more than half width of front border ; middle third 

 produced in small rounded lol)e, cleft and with comb of hairs. Palpus cut 

 straight at end ; rather flat, nearly or quite smooth. End hooks short ; 

 moval^le hook bent, sharp, reaching base of opposite one. Prothorax as 

 broad as hind part of occiput. Legs slender, hind legs reaching ninth seg- 

 ment. Femora with dark ring on lower part. Processes long, of equal 

 length, sharp, enclosing somewhat less than right angle, a little bent out- 

 ward. Win": cases reachina; sesjment five. Abdomen rather broad ; enlaro-ed 

 gradually to seventh segment, thence tapering rather abrupth-. Segments 

 with four dorsal and foiu- lateral darker .spots, and two polished impressions 

 on each side ; tenth segment shortest. Lateral spines on segments five to 

 nine, that on ninth nearly as long as tenth segment. All segments finely 



