24 THE IMMATURE STATE OF THE ODONATA. 
eranulated. Appendages longer than two last segments; sharp, middle one 
a little shorter than inferiors, deeply notched; lateral superiors cylindrical, 
sharp, nearly two thirds as long as middle one.- Female valve not quite 
reaching end of segment nine. Male projection conical, rather sharp, a 
little shorter than lateral superiors. The two male specimens are not fully 
developed in these parts, being only 30 and 55mm. long. A full-grown fe- 
male specimen from Minnesota, 47mm. long, belongs apparently to this 
species. The determination seems to be justified, as Mr. Sanborn found 
nymph and imago at the same place, Hermit Lake, in middle of July. 
17. ZSCHNA CONSTRICTA. 
Puate III, Fie. 1. 
Say. Hagen, Synopsis N. American Neur, p. 123. 
Nymphe, two full-grown, in alcohol. Length, 41 mm.; breadth, 7 mm. 
Locality, Shooley’s Mountain, Pa.; Boston, Mass., raised by Mr. 8. Henshaw. 
Coll. Mus. Comp. Zoi. 
Similar to AS. eremita. Longer and more slender in proportion. Head 
very similar. Mask narrower at base, more abruptly enlarged at apical 
third. Palpus finely denticulated, tip cut straight. Processes similar to 
A. eremitica, not so long nor so sharp, the anterior less bent, the posterior a 
little larger. Legs similar in shape, shorter in proportion; hind legs not 
reaching segment eight. Granulation on abdomen very fine. Lateral spies 
on segments six to nine, an indication on fifth. Ninth segment half length 
of tenth. Inferior appendages as long as two last segments, very sharp ; 
middle one not so long as inferiors; deeply notched; lateral superiors 
more than half length of middle one, cylindrical and abruptly sharpened. 
Male projection conical, somewhat shorter than lateral superiors, sharp. 
Hairs among granulation, small, yellowish. 
Two full-grown female nymph, one from Maryland, the other without 
locality, and a small male seem to belong to this species. Male, in alcohol, 
from Lake Champlain, is sufficiently like to be placed in this species. Some- 
what less slender, darker in color; two black rings on femora and tibiae and 
on end of tarsal joints. 
A very small nympha from Bethel, Me., and some younger ones from 
Cambridge, Mass., are colored in the same manner. Abdomen in many 
specimens dark, varied with short linear spaces of paler color and with large 
