9. Dorsc.l surface of preantennal region without a 



transverse suture -'-0 



Dorsal surface of preantennal region with a 



transverse suture EHINONIRMUS 



10. Head of male and female with chitin of anterior 

 portion of head arranged into a number of 



projections OXYLIPEUHUS 



Head without such chitinous projections 11 



11. Female tergal plates with a median division; 

 male width at temples not less than at 



antennae CUCLOTOGASTER 



Female tergal plates entire, without a median 



division; male width at temples less than at 



antennae LIPEURUS 



12. First abdominal segment larger than those 

 following; temples not prolonged beyond the 



ocular margin GONIODES 



First abdominal segment smaller than those 



following; temples prolonged beyond the 



ocular margin CHELOPISTES 



13. Dorsal anterior plate bearing numerous crescentic 



papillae on the dorsal surface ARDEICOLA 



Dorsal anterior plate without such papillae 14 



14. Dorsal anterior plate large with a longitudinal 

 slit; gular plate large; abdominal segment IX 



of 9 bilobed FULICOFFULA 



Without above combination of characters 15 



15. Head wider than long 1^ 



Head longer than wide 1' 



16. Antennae similar in both sexes or 3rd segment 



of o' with an appendage; 9 with 2 genital setae on 



a ventral tubercle on each side RALLICOLA 



Antennae similar in both sexes, 9 without genital 



setae on a ventral tubercle on each side STRIGIPHILUS 



17. Antennae similar in both sexes or 3rd segment of 



o" with an appendage; d genitalia simple RALLICOLA 



Antennae of o' with an appendage on the 1st or 



3rd segment; d genitalia very complex PECTINOPYGUS 



Antennae similar in both sexes 1° 



18. Anterior margin of head with a deep 



emargination ACIDOPROCTUS 



Head without such emargination ~ 19 



66 



