THE IMMATURE STATE OF THE ODONATA. 2 
I 
or 
black rings on femora and tibia. This nympha is figured by Mr. F. San- 
born, Report 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 
J. constricta or A. clepsydra. The type of Mr. F. Sanborn’s figure is in 
his collection of nymph. 
A full-grown nympha from Sitka, Northwest America, belongs perhaps 
to Al. Sitkensis. It is in bad condition, and is not figured, but is very sim- 
ilar to the above described species. 
Three nymph, supposed to belong to A%. clepsydra, multicolor, and ver- 
ticalis were not described. None of them is full-grown. 
18. ZSCHNA SPECIES. 
PLATE IV. Fria. 2. 
Nymphex, male and female, very young to full-grown. Length, 20 to 
57mm.; breadth, 9mm. Locality, Himalaya, Kooloo, and Sutledge River. 
Rey. M. Carleton. 
Similar to Anax ; very long, but narrow; third joint of antennx about as 
long 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 length of middle one, abruptly pointed. Male projection shorter, con- 
ical, Femora with dark rings before the lower end. Abdomen not very 
thickly covered with spimous tubercles. 
No imago arrived with the nymphxw. Perhaps they belong to AZ. ampla. 
19. AASCHNA SPECIES. 
Prats I. Fie. 4. 
Nine nymphx, male and female, full-grown and young, in alcohol. 
Length, 45mm.; breadth, 9mm. Locality, Rio San Francisco and Carun- 
dahi, Rio do Maeacos; one male nympha from Reajinha River, near Corpo de 
Pompo, from Barbacena, Brazil. Thayer Expedition. Coll. Mus. Comp. 
Zool. 
Full-grown and very young nymphe, 24 mm. long, wine cases not reach- 
ing first segment, from Rio do Macacos have appendices similar. 
