THE IMMATURE STATE OF THE ODONATA. 25 



black rings on femora and tibia^. Tlils n^'mpba is figured by Mr. F. San- 

 born, Eeport Mass. Board of Agricult., 1862, p. 149, and copied in A. S. 

 Packard's Guide, p. 602. Mr. Sanborn stated it to be the nympha of one of 

 the most common species, and Mr. Packard considered that it belonged to 

 JE. constricta or ^E. clepsydra. The type of Mr. F. Sanborn's figure is in 

 his collection of nymphsB. 



A full-grown nympha from Sitka, Northwest America, belongs perhaps 

 to JE. Sitkensis. It is in bad condition, and is not figured, but is very sim- 

 ilar to' the above described sjDCcies. 



Three nympha?, supposed to belong to JE. clepsydra, multicolor, and ver- 

 ticalis were not described. None of them is full-grown. 



18. iESCHNA SPECIES. 



Plate IV. Fig. 2. 



Nymphfe, male and female, very young to full-grown. Length, 20 to 

 57 nun. ; breadth, 9 mm. Locality, Himalaya, Kooloo, and Sutledge River. 

 Eev. M. Carleton. 



Similar to Anax ; very long, but narrow ; third joint of antennae about as 

 Jong as the following together. Processes blunt ; posterior more prominent, 

 enclosing an obtuse angle. Mask cleft wider, with a small black tooth on 

 each side. Palpus cut straight at tip, upper angle sharp and lower one pro- 

 duced in a strong end hook ; below finely denticulated. Lateral appendages 

 half leugtli of middle one, abruptly pointed. Male projection .shorter, con- 

 ical. Femora with dark rings before the lower end. Abdomen not very 

 thickly covered with spinous tubercles. 



No imago arrived with the nymphte. Perhaps they belong to JE. ampla. 



19. ^SCHNA SPECIES. 



Plate I. Fig. 4. 



Nine nympha^, male and female, full-grown and young, in alcohol. 

 Length, 45 mm. ; breadth, 9 mm. Locality, Rio San Francisco and Carun- 

 dahi,Rio do Macacos; one male nympha from Reajinha River, near Corpo de 

 Pompo, from Barbacena, Brazil. Thaj'cr Expedition. Coll. Mus. Comp. 

 Zool. 



Full-grown and very young nympha;, 24 mm. long, wing cases not reach- 

 ing first segment, from Rio do Macacos have appendices similar. 



