^Ir. A\'. F. Kiiliy on OihinaUi from Sierra Leone. 71 



l'>r.i!Li:ciA, gen. nov. 



Eyes connected by a slioit .space ; frontal tubercle rounded 

 above, and slii^litly concave in front; abdunien with segments 

 2 and 3 carinatcd. Wing.s with only one nervure in the 

 lower basal cell and no supratriangular ncrvures : fore wings 

 with 12-13 antenodal cross-nervures, the last not continuous, 

 and 10-11 postnodals ; pterostigma long and thick, nodal 

 sector slightly waved beyond the middle, and with a double 

 row of cells between it and the subnodal sector for the last 

 third or fourth of their length ; arculus rising between the 

 first anil second antenodal cross-nervures ; sectors of the 

 arculus stalked ; triangle traversed by 1 or 2 ncrvures and 

 followed by a row of 4 cells, then by 2 or 3 more or less 

 irregularly, before rising again to 4 increasing, or by seven 

 rows of 3 only ; subtriangular space consisting of 3 or 4 cells : 

 hind wings with 10 antenodal and 11 postnodal cross- 

 nervures ; triangle traversed by a nervure or (rarely) free ; 

 sectors of the arculus widely separated, the up[)er one rising 

 considerably above the lower angle of the triangle, where the 

 lower sector rises ; base of triangle nearly corresponding with 

 the arculus. Claws dentated beyond the middle. A|)[)e:idages 

 of the second segment in the male rather large ; upper 

 terminal appendages rather long and slender, fully as long as 

 the ninth segment ; lower appei\dage nearly as long as the 

 upper ones, truncated at the extremity. 



This genus appears to be nearly allied to Tritheniis^ but in 

 typical Trithemis the sectors of the arculus are scarcely 

 separated in the hind winii's and the trianiide of the hind wiuLfS 

 is never divided. 



It is to be regretted that Mr. Austen obtained only three 

 specimens of this interesting species, all in bad condition. 



Beblecia adolescens, sp. n. (Woodcut, fig. 2.) 



Exp. al. GO millim.; long. pter. 5 millira. 



Lighter or darker ochraceous ; pleura, pectus, and face 

 paler; vertex darker, sometimes slightly greenish; antennie, 

 ocelli, spines on the legs, and central and part of the lateral 

 carinaj on the abdomen black; a pale brown shoulder-stripe 

 and a similar stripe on each side of the upper part of the 

 abdomen : wings hyaline, with black neuration ; costal 

 nervure and pterostigma yellow, the latter between black 

 nervures ; membranule of hind wings whitish, beyond it the 

 wing is very slightly stained with yellow. 



