14 THE IMMATURE STATE.OF THE ODONATA. 
than in A. Junius, separated from occiput by nearly straight line. Posterior 
part of vertex has indication of ocelli. Elongated elevations outside of 
vertex, large and marked. Antenne small, similar to Aschna. Occiput 
short, hind angle rounded with indistinct bands on upper side, notch 
of hind border rather shallow. Mask long, extending to between middle 
legs, narrow, gradually enlarged forward. Middle third produced in rounded 
lobe, cleft, with comb of hairs. Palpus meeting opposite one; narrow, cut 
straight at end, with lower angle produced in short tooth, finely denticu- 
lated; movable hook, sharp bent, reaching base of opposite one.  Pro- 
thorax as broad as occiput, rather short. Stigmata behind the prothorax 
uncovered. Processes nearly equal in length, short, blunt, enclosing right 
angle, posteriors largest. Legs long, slender, nearly cylindrical, hind legs 
longest, reaching end of segment eight. Femora longer than tibiz; tarsi 
about one half length of tibix; apical joint making one half of tarsus; 
claws strong, sharp, bent; thorax comparatively small. Wing cases reaching 
nearly to segment five. Abdomen rather small at base, gradually enlarged 
to segment seven; thence tapering, rounded above, each segment with eight 
impressions. Dorsal band dark, interrupted throughout its length by paler 
line; lateral paler bands on each side; margin of abdomen darker, indis- 
tinctly marked with paler linear spots. Strong lateral spines on segments 
seven to nine; that on ninth as long as segment ten. Segments of equal 
length, tenth shorter. Inferior appendages long, sharp, as long as two last 
segments; middle one shorter than inferiors, notched; lateral superiors 
cylindrical, sharply pointed, half as long as middle one; male projection 
very small, cut square at tip, less than one half the length of laterals: fe- 
male valve two thirds of segment nine, small. Nymph described are types 
of H. Hagen, Stett. Zeit. XIV. p. 268, and F. Brauer, Neur. Austr. p. xvi. 
Dr. Hagen considers this species to be the “ Auschna grandis” described by 
L. Dufour, An. Nat. Ser. 3, XVII. p. 69, pl. 38, f. 1. The younger nymphs 
from Vienna, mentioned by H. Hagen, Stett. Zeit. XIV. p. 267, as belong- 
ing perhaps to Anax Parthenope, prove to be young specimens of Anax 
formosus. 
3. ANAX MAURICIANUS. 
Rambur, Neuroptéres, p. 184. 
Nympha, male and female, dry, full-grown, and young. Length, 46 mm. ; 
breadth, 10 mm.; the smallest young, length, 26mm. Locality, Mauritius 
