620 JOURNAL, BOMBAY NATURAL HLST. SOCIETY, Vol. XXV, 



2. Tetrathemis yerburyil, Kirby, Linn. Soc. Jour., Zoo. 24, jj. 536, tal^. 41, 

 fir/. 4, 1893. 



Expanse 46 mm. Length 30 mm. 



Male ; head ; labrum and labium yellow, marked with black ; face yellow ; 

 forehead black metallic green with yellow markings below its external 

 border and a yellow spot near the eye ; occiput and occipital cavity black. 

 Prothorax large, notched in the middle, black with a broad, yellow border. 

 Thorax, deep black with three yellow bands, the first over the lower two- 

 thirds of the humeral region, the second traversing the anterior thoracic 

 spiracle and the third over the hinder half of the metathorax. 



Abdomen cylindrical, fairly robust, a little dilated at the base, black 

 with yellow markings as follows : — A basal lateral stripe running from the 

 2nd to 5th segment, gradually tapering away on the sides of the latter, an 

 interrupted mark on the raiddorsum and a half ring extending about one- 

 third the length of the segments from their bases. 



Superior appendages small, the pointed apex turning outwards, the didtal 

 half of the underside dentate or spined. Inferior anal appendages of 

 uniform length. Genitals ; 2nd abdominal segment very small, the tenta- 

 culas scarcely visible from tho side, fairly slender, backwardly and inwardly 

 directed hooks. Lobe usually narrow and indistinctly separated from the 

 segmental border. 



Wings hyaline, the base very light yellow and the apex with a rounded, 



brown spot reaching as far as the stigma. 9-10 antenodal nervures in 

 fore-wing, 8 in the hind ; 1 cubital nervure in the fore-wing, 2 in the hind. 

 Stigma 2 mm. 



Female; colour same as in the male except that the spots on the abdo- 

 men are somewhat larger. 8th ventral plate overlapping the 9th segment 

 up to about its middle, its Iree border forming a low arch, the 9th ventral 

 plate prolonged into a long, narrow, tongue-like process nearly pointed at 

 the apex and ciliated. 



Hab. Bengal, Assam, Tenesserim. 



Genus Hyl.eothemis. 



3 4 



Fvj; ;?. — Wing's of Hi/locotlicnus (X2i) showing;- main neuration. 

 .. i . — 3Iale secondary oruans of s-anie ' X IH) viewed from below. 



