MBELLULID.E. 



81 



Ocelli* 3>bu8 in linea transversa positis. 



Ocnlis supra contiguis : abdomine elongate cylindrico. 



•-//w acuminatis ; stigmatibus elonga.tis: . 10. A VAX. 

 obt IN s ; stiff matibus ohlongis : . . 11. ^shna. 

 vix contiguis ; afirfomirtc clavatis : . . 12. Cordulegaster. 



remotis : 13. Gomphus. 



3.bus in triangulo sitis : 



Ca;)ife et /Horace metallicis : . . . .14. Cordulia. 



baud metallicis : . . .15. Libellula. 



Genus X. — ANAX, Leach. 



Labium with its midlle lobe transverse, somewhat ovate-quadrate, tumid, 

 divided by a longitudinal impression into two parts, its apex deeply 

 emarginate ; lateral lobes not encircling the central one, furnished with a 

 moveable acuminated process, which rests on the upper edge of the inner 

 lobe : mandibles with long denticulations : lahrum slightly emarginate : head 

 eemiglobose, its front very prominent, somewhat acute an ! vesicular : ocelli 

 placed in a line upon a slight elevation : eyes contiguous : abdomen elongate- 

 cylindric, its basal segment tumid, third coarctate ; the apex of the male 

 with three appendages, the lower one truncate, of the female with two 

 lanceolated ones : wings long, slender, somewhat acute at the apex ; stigma 

 very long and narrow ; the hinder margin of the posterior pair rounded in 

 both sexes. 



Exclusively of slight variations in the trophi, &c. the only 

 indigenous species of this beautiful genus differs from Anax in that 

 both sexes have the hinder margin of the posterior wings rounded 

 within ; the abdomen is not clavate, and its anal appendages are 

 long in both sexes. 



Sp. 1. formosa. Thorace azureo aut virescente immacvlato, abdotnine striga 

 dorsali angulosa nigra, pcdibus nigris, basi rufis. (Long. corp. 3 unc. 1 — 2 

 lin. ; Exp. Alar. 4 unc. — 4 unc. 2 lin.) 



.Sshna formosa. Van. Linden 20 — An. Imperator. Steph. Catal. 268. 

 No. 3455. 



Head azure, luteous beneath, mouth fuscous ; eyes green, yellow behind ; 

 thorax immaculate azure or greenish, dorsal sutures blackish; space 

 between the wings azure, with black sutures ; abdomen with the basal 

 segment tumid, third attenuated, the first greenish, the remainder pale 

 azure, with the margins and a continuous irregular band reaching to the 

 apex black ; anal appendages fuscous, legs black, femora reddish at the 

 base; wings hyaline, costal nervures and a few of the transverse ones 

 yellowish, remainder black ; stigma oblong, fuscous. 



Female with the abdomen fuscous at the base, the hinder margin of the firat 

 Mandibulata, Vol. VI., Juke 1.5th, 1836. l 



