94 



Mr. P. W. Bassett-Smith on 



five or six times as long as head 

 and thorax ; anterior antennae 



6-jointed 



b'". Only three pairs of limbs formed, 

 first biramose, second uniramose, 

 third stump-like ; anterior an- 

 tennae 6-jointed 



e'". All four pairs of limbs formed. 

 a*. Anterior antennae 3-jointed ; 

 first and second pairs of legs 

 biramose, third and fourth 

 stump-like ; genital segment 

 four times as long as head and 



thorax 



b*. Anterior antennae 6-jointed ; all 

 four pairs of legs biramose .... 

 c*. Anterior antennae 15-jointed ; 

 second, third, and fourth legs 

 biramose, 1-jointed, first uni- 

 ramose 



b" . Anterior antennae with hooked basal 

 joint; posterior antennae short, with 

 three claws 



Expressed diagramatically, thus : — 



DlCHELESTHIINA . 



Clavella, Oken. 

 Helleria, B.-S * 



Pseudoclavella, g. n, 

 Cycnus, Edw. 



Nemesis, Roux. 

 Eudactylina, Bened. 



I I 



Clavella. Helleria. Pseudoclacella. Pseudocycnus. Cycnus. Nemesis. Eudactyhna. 



Lamproglena. 



Dunusa. 



* Ann. & Mag. Nat. Hist., Jan. 1898, p. 10. 



