N0V1TATK3 ZOOLOGICAE XXII. 1915. 



269 



of the branches is illnstrated by text-figs. 9 (saiia) and 10 (algiriae). The 

 segments are so long and slender in algiriae that the dorsal scaling is plainly 

 visible in a view from the underside, which is not the case in saiia. 



In the specimen from which text-fig. iO is taken, the last two seghients are 

 fused together, and only one side-branch of the pennltimate segment is developed, 

 which often happens in antennae pectinated to the apex. The number of distal 

 segments which are without long pectinations varies in sana to some extent, bnt 



Fig. 9. — Cerocala sana. 

 ., 10. — „ algiriuc. 



there are always at least six segments which have no side-branches or in which the 

 branches are shorter than the segments. 



I mention incidentallv an interesting morphological fact observed in Cerocala 

 (and elsewhere). The ventral sensory cone (Cj placed at the apices of the segments 

 I.-* central on the simple antennae of the females, and on the penultimate (simple) 

 segment of the male of sana (text-fig. 9). From this central, normal position it 

 wanders on to one of the branches of the antenna, having a nearly apical position 

 on the pectinations of one side. The antennae figured are left ones ; on the right 

 antennae the cones are on the branches of the other side. The branches bearing 

 the cones, therefore, are those nearest the forewing — i.e. the branches of the 

 outer row. 



