On new Dragonflies from Sierra Leone. 213 



29. Periclimenes [Falciger) kolumadalensls. 



Related to P. horradailei, Rathb., 1904 { = P. tenuipes, 

 Bon-., 1898), but (1) rostrum 2^ times leiigtli of carapace, 

 (2) second le<^ 7 times length of caraj)ace, (8) second legs 

 unlike, one with finoers gaping very widely. 



Kolumadulu Atoll, Maldive Is. 



30. P onto niop sis com ant hi. 



Rostrum reaching end of second joint of antennule, its 

 breadth about equal to that of eye. Antennal scale out- 

 reaching antennular stalk, broad. Arm and wrist of first leg 

 subequal. Great chela outreaching antennular stalk by hand, 

 its wrist very short and wide, with a sharp process below. 



Torres Straits, on Comanikus. 



31. Periclimenccus Jimhriatus. 



Rostrum ^, without teeth behind orbit. Fixed (iniicr of 

 second leg bears knob and movable linger a socket. Fingers 

 of uropods, scales, &c., very long. 



Mulaku Atoll, Maldive Is. ; Providence. 



32. Periclimenceus robusius. 



Rostrum ^, with two teeth behind orbit. Movable finger 

 of second leg bears knob and movable finger a socket. Fringes 

 not remarkably long. 



Amirante I. 



33. Pontonia maldivensis. 



Rostrum reaches middle of first joint of antenimle. Maxilli- 

 peds without exopodites. ISecond legs unequal, the larger 

 about twice as long as carapace, with long, parallel-sided 

 hand. Dactylopodites of last three legs simple. 



Fadiffolu Atoll, Maldive Is. 



XV. — New Dragonjiies (^Odonata) of the Suhfamily Libellu- 

 linse from Sierra Leone, W, Africa. By Dr. F. RiS, 

 Rheinau, Switzerland. 



The following descriptions have been extracted from proof- 

 sheets and manuscript of the writer^s 'Monograph of the 

 Libellulinae ' (Collections Selys, fasc. ix.-xvi.). By the 

 kindness of Mr. Herbert Campion I was enabled to examine 

 Ann. & Mag. N. Hist. Ser. 8. Vol. xv. 15 



