168 JOURNAL, BOMBAY NATURAL HIST. SOCIETY, Vol. XXVI. 



;" V- Expanse 70 mm. Length 50 mm. 



Head: occipnt olivaceous ; eyes a bottle green, paler beneath ; epistomo. 

 clypeUjS and labrum, a greenish yellow, the upper part of former, blackish ; 

 vesicle brown. , 



Probhorax; the anterior and middle lobes black with a fine bprderin^ 

 of yellow anteriorly, the posterior lobe yellow. 



■ Thorax : greenish yellow with the following black markings :— a fane, 

 mid-dorsal line, a narrow humeral line, 4 narrow lateral lines and an in- 

 complete lino on the metepiraeron. The forepart of tergum and the 

 attachments of the wings on either side of tergum powdered with' cobalt 

 blue, this latter more evident in old specimens. Beneath greenish yellow, 

 the sutures outlined in black. 



Legs ; outer surfaces yellow, inner black. , 



Wings hyaline, the costa and many nerVures at the base, principally the 

 antenodal and cubital, yellow. At the base of the hindwjng a small b3,saJ 

 marking extending along the membrane for about 2 cells width and in the- 

 cubital space for not quite half-way to the cubital pervure. 12-13 

 antenodal nervures ; arc between the 2nd and brd antenodal nervures 

 soinetimes at the 2nd and rarely between the 1st and 2nd; 8th nervure 

 widely separated from the anal angle of trigone in the hindwiug ; trigone 

 and hypertrigone in the forewing traversed, in the hind, both entire. 



Stigma a bright yellowish brown, '&5 mm. ; membrane blac^, occasionally 

 spotted with yellow. 



Abdomen : segments 1 to 3 laterally, slightly, ventro-dorsally^ greatly 

 dila,ted ; the 3rd narrowing rapidly, the 4th, 5th and 6th slim and cylin- 

 drical, the 7th, 8th and 9th strongly, veutro-dorsally dilated. , Segments 1 

 to 3 yellowish-green with the sutures, including the transverse ridge on 

 the 3rd, mapped out finely in black, the remaining segments black with 

 long, oval spots of yellow on the borders of the 4th to 6th. In very adult 

 specimens, there is often a thin, white frosting to the underside of the 

 thorax and abdomen and entirely frosted specimens are not unknown, the 

 variation in the colour and markings being extremely wide. 



Anal appendages : a pale green, almost white. >. 



Colouration of female : very similar to that of male. 



Genital organs of male : lamina prominent, inclination to the body axis 

 45° ; the apical part more so, about a right angle, and somewhat tapered, 

 furnished with 2 tufts of stout, yellowish bristles which diverge strongly 

 from oae another. The internal tentacula with only a small hook, the 

 external depressed, black, strongly concave and shell-like; the lobe longi- 

 tudinally broad, shailowly arched and coated thickly with stout, coarse 

 bristles. 



Genital organs of female : border of 8th segment, mo^terately foliately 

 dilated, strongly spined. End of 8th ventral plate; flatly arched, notched, 

 the borders of the notch turning outwards ; 9th ventral plate iu its basal 

 half steeply carinated, in the apical half, swollen. 



Hab. All India, Ceylon and Straits ; Mesopotamia and Basra. 



26. Orthetrum testaceum testaceum, Ris. 



Ortliefrum teataceum, Kirby, 



Libdlula -testacen, Burmeister. ' : ' , ■: 



Eri/themis tentacea, Brauer. )%'■/- 



Libella tesiacea, Brauer. ' ,'.\-\ ■ 



Expanse 36 to ■^O mm. Length 66 to 74 itihii.' ' 

 Head; forehead orange or reddish; face yellow; eyes opalescent 

 slaty blue, paler beneath ; vesicle and occiput brownish, 

 Prothorax : golden brown. 

 Thorax : reddish brown ; no markings ; often a thin bluish frosting present 



