16 iH) Caudal appendage basically a single spike 

 16 iU) Caudal appendage more than one spike . . . 



17 

 23 



17 (iff) Caudal spike terminates in a membranous bag BatiUipes buUacaiidatus 



17 [16) Caudal spike blunt or sharp tipped 18 



18 (i 7) Distinct constrlction(s) present on clavae 19 



18 [17) Clava uniform in width, constrictions absent 21 



19 [18) Single constriction present on clava 20 



19 ( 18) More than one constriction present on clavae BatiUipes annulatus 



