NETTEOPTERA ODOITATA OF CEYLON. 553 



*t22. Lathrecista simulans. 



Aojrionoptera simulans, Selys, Ann. Mas. Genov. xiv. p. 300 (1879). 



Trincomali and Mahagany, Oct. 12, 1890 ; Sept. 20, Oct. 20, 

 Nov. 20, 28, Dec. 17, 1891 ; March 6, 1892. Velvery, Nov. 25, 

 1891. Tamblegam, Nov. 19, 1891. 



E;ecorded from Ceylon and Malacca. 



*t23. POTAMAKCHA OBSCUEA. 



Libellula obscura, Ramb. Ins. Nevr. p. 64 (1842). 



Libellula congener, Ramb. I. c. p. 70 (1842) . 



Potamarcha obscura, Karsch, Berl. ent. Zeitschr. xxxiii. p. 370 (1890). 



Trincomali, Sept. 16, Nov. 10, Dec. 16, 1891. Mahagany, 

 Sept. 20, 1891. Velvery, Oct. 25, 1891. 



Rambodde {Sag en). 



Eecorded from the Philippines, Java, and Malacca, as well as 

 from Ceylon. The British Museum also possesses specimens 

 from India and Celebes. 



Beadinoptga, g. n. 



Prontal tubercle concave; abdomen rather slender, hardly 

 thickened at base, a little shorter than the hind wings ; segments 

 2-4 strongly carinated ; pterostigma pale at both ends. Pore 

 wings with 12-13 antenodal and 8-9 postnodal cross-nervures, 

 triangle traversed by 1 nervure, sometimes a little beyond 

 the level of that of the hind wings, followed by 3 rows of cells, 

 increasing, the base slightly oblique, no supratriangular nervures ; 

 1 cross-nervure in the male in the lower basal cell, 2 in the 

 female, nodal and subnodal sectors very slightly waved : hind 

 wings with 8 or 9 antenodal, and 9 or 10 postnodal nervures, 

 triangle followed by 3 rows of cells, increasing, sectors of the 

 triangle separated at base. Anal appendages slender, pointed, 

 those of the female as long as the 9th segment, those of tlie 

 male somewhat longer ; lower appendage of the . male broad, 

 spatulate, nearly as long as the others. 



All the other characters as in my definition of Semistigma. 



This genus is evidently the Asiatic representative of the African 

 Hemistigma. 



*t24. BRADIlSrOPTGA STIGMATA. (PI. XLI. fig. 3, c? .) 



Long. Corp. 36-40 millim.; exp. al. 65 millim.; long. pter. 

 4 millim. 



Hale. Dull testaceous ; head with the labrum yellow, and the 



LINN. JOURN, — ZOOLOGY, VOL. XXIV. 41 



