AGRIONIDiE. 645 



longitudine. Abdomen olivaccum ; suturcr, vittcB dua dorsa- 

 les totidemque ventrales latissima nigra, abdominis maximum 

 partem occupantes-. Pedes nigro-fusci. 



Libellula dispar, Pal. Beauv. 



Guinea. 



Sub-gen. 2. RHINOCYPHA. 



Quadrilateralis longior, veniilis niimevosis. Abdomen paiillo 

 depressum. 



Mas. Alae ex parte opacaj. 



Rhinocypba, Ramb. Hist. Nat. Ins. Neur. 232. 

 Calepteryx, p., Biirm. 

 Libellago, p., De Seli/s- 



Epistoina very tumid and prominent : labium divided even to 

 the base into two triangular narrow obtuse parts ; labial palpi nar- 

 rower than the labium, their penultimate joint much shorter, with 

 its internal angle prolonged and terminated by two spines, or one 

 bifid spine ; last joint slender, filiform, almost cylindrical, nearly as 

 long as the preceding : abdomen shorter or hardly longer than the 

 wings; upper appendages a little more simple than those of Calep- 

 teryx : legs tolerably long, finely fringed ; claws of the tarsi not per- 

 ceptibly divided towards the tips : wings rather narrow, with a 

 variable reticulation, a little pediculated, or with the hind border 

 not extending to the base ; humeral part much shorter than the 

 radial part; pterostigma like that of the LibelJulides. 



Tropical Asia. 



Sect. 1. 



Statura minor. Mesolhoracis angulus semper brevis, triangu- 

 laris. Abe plus minusve angusta?, areolarum postcostalium serie 

 unica. 



Group 1 . Type L. tincta. 

 Mas etffcm. A\x quatuor colorata?, macidis vitratis nullis. 



