270 THE CANADIAN ENTOMOLOGIST 



6 (7) Tegmina reaching well beyond middle of abdomen. .. Aloha. 



7 (6) Tegmina very short, not reaching to middle of 



abdomen Nesorestias. 



8 (5) One median frontal carina, forked or simple. 



9 (10) Head enormously elongate, longer than thorax and abdo- 



men combined Dictyophorodelphax 



10 (9) Head not elongate. 



11 (12) Mesonotum with rounded disk, a depression dividing the 



disk from the posterior angle Proterosydne. 



12 (11) Mesonotum with flattened disk, no distinct depression 



dividing the disk from posterior angle Nesosydne 



Tropidocephalini . 



1 (8) Lateral carina; of vertex and face only moderately de- 



veloped. 



2 (7) First joint of antennae terete, or if at all flattened than 



longer than wide with lateral edges sub-parallel. 



3 (4) Vertex turbinate (triangular with curved sides), sometimes 



considerably elongate; lateral edges of face arcuate; 

 antennae very much shorter than face, first joint annular, 

 second about twice the length of first Tropidocephala. 



4 (3) Vertex quadrate. 



5 (6) Antennae slightly longer than face, joints subequal in length, 



first slightly flattened; lateral edges of face straight, 

 subparallel; length of vertex equal to width at base; in 

 profile clypeus not bent at right angle to 

 face Sogatopsis. 



6 (5) Antennae about length of . ace, first joint terete, about 



2-3 length of second; lateral carinae of face arcuate; in 

 profile clypeus bent at right angle to face Arcojacies. 



7 (2) First joint of antennae subsagittate, broader at apex than 



base, only a little longer than wide Bambusibatus. 



8 (11) Lateral carinae of vertex and face forming deep keels. 



9 (10) First joint of antennte about equal to second, not 



f ol iaceous Lanaphora 



10 (9) First joint of antennae much longer than second, flattened, 



foliaceous Pur oh ita . 



(To be continued.) 



