1914J F. F. lyAiDLAw : Odonata. 341 



34. Rhinocypha quadrimaculata , de Selys. 



2 cf & Dejoo, Upper Assam {H. Stevens). 

 I cf Silonibari, Upper Assam {H. Stevens). 

 I cf (teneral) Kawkareik {F. H. Gravely). 



AGRIONINAE. 

 ' ' Legion ' ' Platycnemis. 



35. Coeliccia himaculata, sp. nov. (PI. xvi, fig. i.) 



I & Dejoo, Upper Assam, 25-v-io {H. Stevens). 

 Length of abdomen 37 mm. 

 ,, hind-wing 22'5 mm. 



M3 proximal to the nodus, RS a little distal. Quadrilateral 

 with its costal margin, scarcely shorter than the anal, the differ- 

 ence is less than one-fifth of the whole length of the anal margin ; 

 relatively long, so that it occupies one-half of the distance between 

 the level of the arculus and of the nodus, the other half being 

 occupied by a single cellule. Costal side of pterostigma about equal 

 in length to anal side. 



Head, lower lip whitish, upper lip black with a white margin, 

 the whole of the rest of the upper surface of head black; a pair 

 of yellow-brown post-ocular spots of a wedge-shape excepted. 



Prothorax, anterior margin black, dorsal surface primrose- 

 yellow, posterior margin black, lower surface yellowish-white. 



Thorax black above, pale yellow at the sides and below. On 

 the lower part of the dorsal surface is a pair of large oval yellow 

 spots, they extend upwards for not quite one-half of the length of 

 the dorsum of the thorax. 



Abdomen, i yellow, with a fine distal, terminal ring, and a 

 dark brown semicircular mark anteriorly; 2 to 8 dark brown 

 above, with traces of pale distal articular rings, the lower surfaces 

 also paler; 9, 10 bright primrose-yellow, 9 has a fine black line 

 dorsally, covering nearly its anterior half. 



Anal appendages primrose-yellow, the upper pair equal ni 

 length to 10, rather stout, tapering, with a strong median ventral 

 tooth. The lower pair longer, rather cylindrical, curved inwards 

 at their extremities. 



The great length of the quadrilateral characterizes this hand- 

 some insect, as does the remarkable colouring of the thorax and 

 abdomen. 



The British Museum has in its unincorporated material exam- 

 ples of a geographical race of the species from the Island of 

 Hainan. 



36. Copera {Psilocneniis) annulata (de Selys) subsp. stevcnsi, nov. 

 (PI. xvi, fig. 2.) 



I cr' North Lakhimpur, foot of hills. Upper Assam {H. 

 Stevens). 



Length of abdomen 35 mm, 

 ,, hind-wing 225 mm. 



