66 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVII. 



into an mner area of narrow, elongated cells arranged in transverse rows 

 and an outer of somewhat larger cells. Stigma equal in the two wings, 

 of moderate size. Membrane moderately large. 



Sexual organs: male : lamina depressed, its free border tvirning out- 

 ward, tentaculse straight, the point turning a little outwards ; lobe short, 

 oval, a little less prominent than the tentaculse. Female : border of 8th 

 segment not dilated ; end of 8th ventral plate prolonged into a deeply 

 cleft vulvar scale ; 9th ventral plate carinated at its distal half and 

 bearing two small horny processes similar to those of tramea. 



Only one Indian species. 



69. Hydrobasileus croceus, Karsch. 

 Tramea croceus, Brauer. 

 Tramea extranea, Hagen. 

 Hydrobasileus sxtratieus, Kirby. 



Expanse 90 mm. Length 50 mm. 



Male : head ; eyes reddish brown above, lilaceous or olivaceous at the 

 sides and beneath ; vesicle brown ; face and forehead ochreous, tinged with 

 red and with a brown, basal line to the latter; labrum yellow. 



Prothorax light bro^in. 



Thorax olivaceous or ochreous, paler at the sides where the colour is a 

 whitish green.- Legs ochreous or yellow. 



Abdomen dark ochreous to reddish brown, the first 4 or 5 segments with 

 the borders finely dark brown and on the 5th to 7th, a brownish, subdorsal 

 stripe. A dorsal band commencing on the 7th which merges into reddish 

 brown on the 8th to 10th segments. 



Wings suffused with bright golden yellow, this more intense along the 

 costa of both wings and over the basal area of the hind. The apices often 

 tinted with pale brown, this being more marked in the hindwings. Nervures 

 in the basal part of wing and in the costal fields, bright yellow. The basal 

 marking black and its included nervures a bright yellow ; its size and shape 

 somewhat variable, usually beginning at the tornus and running out as far 

 as the apex of the loop where it ascends that structure, being limited 

 outwardly by its outer border. Anteriorly the border of the spot is more or 

 less crenated and runs obliquely from the outer angle of loop to the tornus. 

 Stigma brownish yellow. Antenodal nervures numbering about 17. 



Female very similar to the male. The face and forehead olivaceous with- 

 out any reddish tinge ; the thorax similar to the male ; the abdomen ochre- 

 ous, with a reddish tinge and all the sutures, the carina and the lateral 

 borders finely mapped out in black. Wings scarcely differing from 

 those of the male. 



Sexual organs. See under genus. 



Anal appendages in the female very small, ochreous. 



Hab. — Throughout India in the moister zones, Ceylon, Burma, Indo- 

 Malay and Indo-China. 



(7b be continued.) 



