JNDIdN nRAaONFLlKS. I(i3 



dorsum of the :3nd segmont. llemaiader of abdomen narrow, with the 

 sides nearly parallel. Frosted with blue or often black with little or no 

 frosting. 



Genital organs of the male : lamina not particularly large, the apical 

 half nearly at a right angle to the basal part, broad, triangular and obtuse; 

 tentaculie very small and nearly semi-circular as seen from the side, 

 strongly cupped and without a distinct external segment ; the internal 

 segment laterally deflected at a right angle. The lobe large, overlapped 

 slightly by the tentaculse. 



Female rather brighter coloured . 



Head ; face, forehead and labruin very pale, almost white and diapha- 

 nous, the labrum often yellowish. 



Thorax : front and laterally a bright yellowish brown, somewhat oliva- 

 ceous. Darker at the sides, black beneath. 



Abdomen : the base somewhat dilated but less so than in the male ; 

 more robust than in the male ; yellowish brown in colour ; 2 dark 

 spots near the apical border of each segment, this border being edged 

 narrowly with blackish brown ; beneath black with narrow, reddish, lateral 

 spots. 



Genital organs of female : border of 8th segment not dilated ; border 

 of 8th ventral plate shallowly arched at the end ; 9th ventral plate not 

 prolonged at the end. 



There is a strong tendency to irregularities in the neuration of the 

 wings of this species. 



Hab. Mesopotamia, Muscat, and Persia. 



22. Orthetrum chrysostigma luzonicum, Eis. 

 Orthetrum chnjsostigina, Selys. 

 Orthetrmn luzonica, Kirby. 

 Orthetrum tricolor, Kirby. 

 Libella luzonica, Brauer. 



Expanse 60 mm. Length 40 mm. 



Head ; eyes brown above, olivaceous at the sides, fading to greenish 

 yellow beneath ; forehead usually with a well-defined, black basal line ; 

 epistome, clypeus and labrum yellow or greenish yellow; labium yellow 

 margined with black or else completely black ; vesicle blackish biown : 

 occiput dark olivaceous. 



Prothorax : greenish yellow with a tine, median, black collar just in front 

 of the lobe 



Thorax dark olivaceous green with a darker humeral or post-humeral 

 fascia, bordered anteriorly with a dark chestnut brown, humeral stripe, 

 and behind by a similar stripe which is however more irregular. Laterallj 

 a light greenish yellow with 2 very obscure darker stripes. Beneath and 

 occasionally the whole of thorax, in very advdt specimens, frosted with 

 blue. The tergum a pale greenish yellow. In some specimens, the sides 

 are much darker and the greenish yellow tint is almost hidden by black, 

 which also spreads over the ventral surface. 



Legs ; anterior femorse yellow ; the ti bite yellow on the outer and black 

 on the inner side ; the middle and hind legs black, striped with yellow on 

 the outer sides of the femor;». 



"Wings hyaline ; 1 to 2 rows of cells between o and 5« ; 12 to 13 antenodal 

 nervures ; 8th nervure well separated from the anal angle of the trigone in 

 the hindwing ; arc at the 2nd antenodal in the forewing, between the Isb 

 and 2nd in the hind. 



Membrane black ; stigma ochreous, heavily bordered with black, 3 to 

 ;')'5 mm. ; costa and antenodal nervures yellow. 



