THE CANADIAN ENTOMOLOGIST 269 



20 (21) Clypeus with median carina Bergias. 



21 (20) Clypeus without median carina ^. I diosy status. 



22 (13) Face with one medio-longitudinal carina, furqate or simple. 



23 (24) First joint of antenna? less than half the length of second 



(second joint slightly flattened) Melanesia. 



24 (23) Joints of antennae subequal or first, but slightly shorter 



than second. 



25 (26) Medio-longitudinal carina of face simple Eucanyra. 



26 (25) Medio-longitudinal carina of face furcate. 



27 (28) First joint of antennae considerably shorter than 



second Ugyops. 



28 (27) First joint of antennae but slightly shorter than 



second Epihidis . 



Delphacin.e. 



Post-tibial spur cultratc, solid, both surfaces convex, dis- 

 tinct teeth along the hind edge Alohini 



Post-tibial spur cultrate, solid but with inner surface con- 

 cave; no teeth along hind edge Tropidocephalini 



Post-tibial spur laminate or foliaceous, sometimes tecti- 

 form, with or without teeth along hind 

 edge Delphacini 



Alohini. 



1 (4) First joint of antennae very short, broader than long; 



second joint short and thick, often ovaliform or sub- 

 ovaliform (all macropterous). 



2 (3) Two median frontal carinae, approximating at base or 



apex, or both, or even meeting together, but not forming 

 a stalk Leialoha. 



3 (2) A single median frontal carina, forked at extreme base, if 



at all Nesodryas. 



a Slender, elongate forms Subgenus Nesodryas 



b Broader, more robust forms Subgenus Nesothoe 



4 (1) First joint of antennee distinctly longer than broad, 



second joint cylindrical or only slightly enlarged at 

 middle (few macropterous, most brachypterous), 



5 (8) Two median frontal carinae. 



