THE IMMATURE STATE OF THE ODONATA. 29 
the lateral superiors. Male genitals indicated ; female valve, in young speci- 
men, -— only 19 mm. long, — only half length of segment, hairy. There is 
a smaller specimen in the coll., Lee Co., Virginia, length, 12 mm., similar ; 
differs only in having the middle appendix more widely split and the in- 
feriors more curved. 
This determination is only conjectural, as G. furcillata has in imago the 
inferior appendage of the male bifid. Perhaps the young nympha from 
Virginia may belong to G. antilope. 
NEURAISCENA. 
Similar to Gompheschna; movable hook, extending somewhat beyond 
the base of opposite one. Lateral spines on segments four to nine. Ap- 
pendages long, middle one as long as inferiors, pointed ; laterals very short. 
22. NEURZSCHNA VINOSA (QUADRIGUTTATA). 
Prate II. Fre. 3. 
Say. Hagen, Synopsis N. Amer. Neur. p. 130. 
Nine nymphe, male and female, full-grown and young, in alcohol. 
Length, 35mm.; breadth, 7mm. Coll. Mus. Comp. Zool. Locality, Berk- 
shire, Tioga County, N. Y., from M. A. Mayer; Kentucky; Vermont; Lake 
Superior. 
Lone, rather stout. Head as in G. furcillata. Eyes broader at imner 
hind angles. Vertex shorter. Ocelli hardly indicated ; antennz, third joint, 
as long as first and second ; fourth more than half length of third; following 
as long as fourth. Occiput notched behind. Sides oblique ; parallel bands 
on hind angles less defined. Mask extending to between middle legs, rather 
narrow in proportion; middle third of front border produced in obtuse lobe, 
cleft, and with a black tooth on each side of cleft. Palpus similar to G. fur- 
cillata. Movable hook reaching somewhat beyond base of opposite one. 
Prothorax similar. Processes more prominent, sharp, of nearly equal length, 
and enclosing rather less than right angle. Anterior more compressed. 
Legs rather stouter in proportion, short; hind legs reaching seventh seg- 
ment. Femora and tibiz with two paler rings. Tarsal joint darker at end. 
Wing cases reaching somewhat beyond middle of fourth segment. Abdo- 
men straighter at side than Gompheschna; rough, marked with eight polished 
impressions. Lateral spines on segments four to nine, those on ninth nearly 
