164 



6 Lateral keels of frons continuing acutely to apical margin 



4 Basileoccphalus 



6a Lateral keels of frons flattening out apicallv 



5 PliacioccpJtalns 



7 Antennae not projecting beyond tlie anterior margin of the 



head (in profile or dorsally) (8) 



ya. Antennae projecting beyond the anterior margin of the head 



• (23) 



8 Antennae scarcely more than twice as long as wide. ... (9) 

 8a Antennae more than three times as long as wide (20) 



9 Wings developed ( 10) 



9a Wings rudimentary 19 Mniria 



10 Head narrower than pronotum (ii) 



Toa Head wider than pronc.tum 18 PJuladclpheia 



I ■ Subcostal vein of tegmen simple (12') 



Tia Subcostal vein of tegmen granulate 17 Ncsoniphas 



12 Tegmina broader and less elongate, or if elongate then 

 strongly widening apicallv ; wings longer in ])ro]iortion 



^. ' .....'. (13) 



7 2a Tegmina narrow and elongate; wings nnich shorter.... 



t6 Proiifista 



IT, \'ertex transverse, apically truncate. se])arated from frons 



by a transverse keel, scarcely extending before the eyes 



7 Lamenia 



13a A'ertex more or less elongate, distinctly not transverse. (14) 



14 Vertex elongate, apically truncate, tegmina widening ver\- 



.strongly towards the apex 15 Lyriccn 



14a V^ertex with lateral margins acute and parallel, not separat- 

 ed from the frons by a cross keel 8 Rhotana 



T4b A'ertex elongate, angulate. extending in front of the eyes 



^ ■ (15) 



15 Antennae not (or very feebly) tuberculatc (i^^ 



15a Antennae subrotundate. strongly tuberculate 13 KaJia 



^6 Head sublinearly elongate as seen dorsally, more than four 



times as long as an eye 14 J- ivaha 



T6a Head not as above (17^ 



17 Lateral margins of vertex narrowly (or not) reilexed, clos- 



er at base, feebly sensorized ( ^8) 



17a Lateral margins of vertex more reflexed. well separated at 

 base, usually strongly sensorized (19^ 



18 Antennae short 9 ^<^^'" 



