INDIAN BRAGONFLIES. 153 



I 

 I 



Key to Species. | 



i. Thorax : a deep, bronze black, its middle seg- 

 ment, its underside and 3 lateral bands, 

 yellow. ' 



Abdomen : black marked with yellow. 



Labrum : yellow. 



Wing apices hyaline. (Occasionally those of 

 the female tipped with brown.) 



Antenodal nervures 18. 2 rows of cells be- 

 tween 5 and 5a . . . . . . . . C. lineata. 



ii. Thorax metallic green. 



Abdomen : dark metallic green without yellow 



markings except on segments 1 to 4 in the '*<. 



female. Adult males with blue frosting on 

 the first 4 segments. 



Labrum black. 



Wing apices in both sexes tipped with black. 



Antenodal nervures 20. 1 row of cells 



between 5 and 5ff . . . . . . . . C. metallica. 



13. Cratilla metallica, Kirby, Ann. May. Nat. Hist. (7) 6 p. 542 (1900). 



Ortliemis metallica, Brauer (1878). ' 



Pi-otorthemis metallica, Kirby. Trans. Zool. Soc. Lon., 12, p. 290 (1889). "• 



Id. Cat., p. 30 (1890). 



Protovthemis metallica, Selys, 



yiesoxenia metallica, Kirby, Cat. p. 180 (1890). 



Cratilla metallica, Ris. Cat. Coll. Selys. /«sc. 10, pp. 152-153 (1909). j 



Expanse 74 mm. Length 36 mm. 



Head large and globular ; eyes broadly contiguous, dark brown above, I 



paler below ; face and labrum black ; vesicle black. \ 



Prothorax black. ' 



Thorax : dark metallic green as far as the middle segment which is yellow. i 



Legs black. 



Wings hyaline ; the apices in both sexes, dark brown as far inwards as | 



the middle of the stigma ; supplementary nervures to the bridge always I 



present ; only 1 row of cells between 5 and 5a ; 18 to 22 antenodal ner- 

 vures ; stigma large, 4 '5 mm. 



Abdomen: a dark metallic green, without marking, in the male, and the ' 



first 4 segments in adult forms, frosted with blue. In the female, border- j 



ing lines of yellow on segments 1 to 4. 1 



Anal appendages black. ' 



(irenital organs of the male : Lamina procumbent, broadly arched ; ten- 

 taculse short, robust, procumbent, strongly curved hooks ; lobe relatively very 

 large, broad and rounded. 



Genital organs of the female ; border of the 8th abdominal segment very 

 broadly and foliately dilated ; vulvar scale inconspicuous, only a slight 

 notch on the posterior border of the 8th ventral plate ; 9th ventral plate 

 keeled, yellow, projecting slightly over the 10th segment. 



Hab. Burma and Tenasserim. 



14. Cratilla lineata, Ris. Cat. Coll. Selys. /«sc. 10, ^j. 153 (1909). 



Cratilla lineata, Forster, Ann. Mus. Hung. 1903, p. 537. 



Cratilla calverti, Id. {Malabar ?). 



Orthemis lineata, Brauer, Albarda and Selys. \ 



Agrionoptera lineata, Kirby, Cat. p. 31 (1890). 



20 ! 



