299a (298b). Antennae with not more than one ring segment and at least 12 segments (as in

Fig.A, club counted as 3); sometimes proximal flagellar segments gradually, even

extensively shortened, almost ring-like, but otherwise not different from distal ones

(Figs.B-D)....................................................................................................................................... 300

 

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A B C D

 

 

299b. Antennae either with at least 2 true ring segments (these clearly different from larger

following segments which bear sensilla), or with fewer than 12 segments (club sometimes

undivided but counted as 3 segments)....................................................................................... .324