520 PROCEEDIXGS OF THE NATIONAL MUSEUM vol. loi 



Except for two species, the members of tliis group are remarkably 

 uniform in general appearance and structure. On the basis of the 

 rather marked differences of the two species in question, the group has 

 been divided into three subgroups. 



The larval head-hair arrangement is constant throughout the group 

 (the larvae of gani and knighti are not described), hairs 4 and 6 

 being before the level of the antennal bases and approximately in 

 line transversely, 7 being on a level behind that of 4 and 6, and 5 

 being posterior to that of 7. Comb scales are numerous and are 

 arranged in a patch. 



All the known species pass the aquatic stages in water collected in 

 the leaf axils of plants {gani has been reported only from pitcher- 

 plants) . 



Recent treatments of this group may be fomid in Stone and Bohart 

 (1944), Knight and Laffoon (1946), and Marks (1947). 



KEY TO THE SUBGROUPS OF GROUP A (KOCHI-GROUP) 



1. Scales of ppn mostly narrow; sternites without outstanding scales apically. 



Subgroup III, gani (p. 521) 

 Scales of pp/i mostly, or all, broad; sternites with outstanding scales apically _2 



2. Basistyle with a prominent tuft of specialized scales; claspette filament blade- 



like Subgroup I, kochi (p. 520) 



Basistyle without an inner tuft of specialized scales; claspette filament spear- 

 shaped in lateral view Subgroup II, lewelleni (p. 520) 



Subgroup T. KOCHI, s. str. 



Definition. — Basistyle with a prominent inner median tuft of scales. 

 Claspette filament bladehke. Scales of ppn broad, or mostly so 

 (female of knighti unknown). vSome sternites with outstanding scales 

 apicall5^ 



Included species. — A. alocasicola Marks, ananae KJaight and Laf- 

 foon, avistylus Brug, bougainvillensis Marks, croceus Knight and Laf- 

 foon, fijiensis Marks, flavipennis (Giles), gahnicola Marks, knighti 

 Stone and Bohart, kochi (Donitz), luteus (liudlow), medleri I^Jiight 

 and Laffoon, poicilius (Theobald), samoanus (Griinberg), solomonis 

 Stone and Bohart, stonei Knight and Laffoon. and vjallacei Edwards. 



Subgroup II, LEWELLENI 



Definition. — Basistyle without an inner median tuft of specialized 

 scales ; instead there is a row of stout setae running along the mesal 

 tergal surface. Claspette filament long, slender, spear shaped in 

 lateral view. Scales of ppn broad, or mostly so. Some sternites 

 with outstanding scales apically. 



Included species. — A. lewelleni Starkey and Webb. 



