14 THE IMMATUEE 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. Antennte small, similar to jEschna. 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 ; movaljle hook, sharp bent, reaching base of opposite one. Pro- 

 thorax as broad as occiput, rather short. Stigmata behind the prothorax 

 vnicovered. 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 tibijB ; tarsi 

 about one half length of tibia?; 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 tlian inferiors, notched ; lateral superiors 

 cylindrical, sharply pointed, half as long as middle one ; male pi'ojection 

 very small, cut square at tip, less than one half the length of laterals : fe- 

 male valve two thirds of segment nine, small. Nymphce 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 " yEschna grandis " described by 

 L. Dufour, An. Nat. Ser. 3, X'/II. p. 69, pi. 3, f 1. The younger nymphaj 

 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. 



Eambur, Xeuropteres, p. 1S4. 



Nympha, male and female, dry, full-grown, and young. Length, 46 mm. ; 

 breadth, 10 mm. ; the smallest young, length, 26 mm. Locality, Mauritius 



