28 THE IMMATURE STATE OF THE ODUXATA. 



GOMPH^SCHNA. 



Body long, slender. Eyes rather small. Abdomen with lateral spines 

 on segments five to nine. Appendages as long as segments nine and ten. 

 Inferiors sharp, bent inward at tip ; middle one a little shorter, sharp, bifid at 

 tip ; laterals very short. 



21. GOMPHiESCHNA FURCILLATA. 



Plate II. Fig. i. 

 Say. Hagen, Synopsis N. Amer. Neur. p. 131. 



Two nymphfB, in alcohol, yoimg. Length, 20 mm. ; breadtli, 7 mm. 

 (figured). Locality, Berkshire, Tioga County, N. Y. Three male and fe- 

 male, length, .32 mm., Brookline, Mass. Two young, Cambridge, Mass. 



Head large, very broad ; length less than half the breadth, much nar- 

 rower behind. Eyes very prominent, placed at forward angles, separated 

 from occipnt by very cnrved line ; space between the eyes wide, convex. 

 Posterior portion formed of three orbicular elevations, showing the indica- 

 tions of ocelli more distinctly than in the other species. Antenna3 small, 

 third joint somewhat longer than fonrth. Occiput short, rough, with yel- 

 lowish scales, sides oblique : hind angles somewhat more than a right angle, 

 with parallel polished bands ; elliptical polished spot on each side of median 

 line ; hind border not very deeply notched. Mask extending to between 

 middle legs gradually enlarged forward. Middle third of front border rather 

 strongly produced ; cleft and with a well defined tooth on each side of cleft. 

 Palpus meeting the opposite one, straight on tip, somewhat arcuated; inner 

 border rounded and finely denticulated ; end hook small ; movable hook 

 bent, reaching base of opposite one. Prothorax narrow, as broad as occiput, 

 somewhat bent up at sides. Processes conical, sharp, enclosing rather less 

 than right angle ; posterior somewhat shortest and not so sharp. Legs 

 rather strong, arcuated ; hind legs reaching segment eight. Femora and 

 tibio3 ringed twice with darker color. Wing cases reaching somewhat be- 

 yond second segment. Abdomen stout in proportion ; lateral spines on seg- 

 ments five to nine, strong ; that on ninth nearly as long as tenth segment ; 

 tenth segment as long as ninth. Appendages stout, sharp, hairy, as long as 

 two last segments. Inferiors pyramidal, sharp, and somewhat curved inward; 

 middle one nearly as long as inferiors, and split at tip ; lateral superiors only 

 one fourth as long as middle one, conical. Male projection conical, as long as 



