SYNOPSIS OF THE SPECIES DESCRIBED. 17 



C. Antenna Zd joint enlarged, circula7- ; body very flat, circular; segment 10 entirely 

 inserted in the Sth. 



Genus : Hagenius. Selys, 1. c, p. 238. 



12. Hagenius brevistyliis. Selvs, 1. c, p. 241. Raised by T. W. Harris. 

 Nympha, female, full grown and young. U. S. Body very flat, enlarged ; antenna; Sd 



joint very flat, circular ; 4th rudimentary ; mask reaching the fore legs, square, front-border 

 somewhat produced ; palpi blunt, smooth inside ; fore legs nearer at base than middle legs. 

 Abdomen nearly circular; dorsal hooks and lateral spines on segment 2 to 9 ; segment 10 

 very small, inserted in 9 ; anal appendices short, the lateral ones very small. 



13. Hagenius Japoiiicus. Sklys, 1. c, p. 244. (Supposition.) 



Nympha, male. Kanagawa, Japan. Similar to the foregoing. Abdomen straighter at 

 sides; dorsal hooks flattened; superior anal appendix not so deeply channelled at sides. 



Legio III. Lindenia. Selys, 1. c, p. 246. 



Sub-genus : Ictinus. Selys, 1. c, p. 26.3. (Supposition.) 



14. Ictinus species. Doubtful determination. 



Nympha, male and feuiale. Himalaya, East Indies. Body short, roof-shaped ; antennae 

 3d joint elongated, 4th rudimentary ; mask extending between the fore legs, square, front- 

 border nearly straight ; palpi rather blunt, inside finely denticulated ; hind legs more distant 

 at base ; tarsi of all, 2 articulated. Abdomen ovoid, side-border sharp, denticulated in the 

 males in segment 7 to 9 ; lateral spines and dorsal hooks in segment 2 to 9 ; segment 10 very 

 small, inserted in 9 ; anal appendices short, sharp, the lateral ones a little shorter. 



DIVISION II. FISSILABIEES. Selys, 1. e., p. 303. 



The under lip cleft in the imago. 



Legio IV. ChlorOgomphus. Selys, 1. c, p. 311. Unknown. 



Legio V. Cordulegaster. Selys, 1. c, p. 317. (Raised.) 



Head transverse, oblong; eyes in the fore corners; antennae, 7 articulated, filiform; mask 

 extending beyond the middle legs, spoon-shaped, covering the mouth and the upper lip ; legs 

 widely and equally separated ; tarsi 3 articulated ; abdomen more cylindrical, tapering to 

 the tip ; the posterior suture of the segments somewhat elevated ; anal appendices pyra- 

 midal. 



15. Cordulegaster Sayi. Selys, 1. c, p. 331. (Supposition.) 



Nympha, full-grown female. Chicopee and Cambridge, Massachusetts ; Maryland. Tip of 

 the mask bifid ; dentation of the palpus sharp; lateral spines on segments 8 and 9 ; superior 

 anal appendix nearly as long and sharp as the inferiors ; lateral ones very short. 



16. Cordulegastei- bidentatus. Selys, 1. c, p. 339. (Raised by Dr. Brauer.) 



Nympha, female, full grown. Europe, Vienna. Very similar to the foregoing ; head 

 more straight ; no lateral spines ; superior anal appendix half as long as the inferior, blunt 

 at the tip. 



17. Coi'dulegaster annulatus. Sely'S, 1. c, p. 333. (Supposition.) 



Nympha, female, not full grown. Europe, Liineburg. Not to be distinguished from 

 C. Sayi. 



Legio VI. Petalura. Selys, 1. c, p. 362. Unknown. 



NO. V. 



