386 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



liasal neivure present. 



Abilouicu coniciilly poiiite<l, tht; second sej^nient witlnmt sulci at base, ovcr- 

 lai>i)in,i; the ajux of petiole; marginal iicrviire distinct; costal cell 



closed SriLoMiCiU's Wcstw. 



Abdomen roun<le«l or truncate at a2>ex, the second segment with sulci at 

 base; marginal ncrvure very short; costal cell usually open. 



1IE.MILKXIS Forster 



2. Biisal nervure wanting; stigmal nervure longer than the marginal. 



HiCMiLEXODKS Ashm., gen. nov. 



3. Sulimargiual nervure not attaining the costa, ending in a stigma 5 



Submarginal nervure attaining the costa. 



Wings with a hisal nervure 4 



Wings without a basal nervure. 

 ^lesonotum with 2 furrows. 



Clul> ■">- jointed Synacka Fiirster 



Club 4 -jointed (Jly tonota Fiirster 



4. Mesonotum without furrows. 



("lub abrui>t, li-jointcd; face keeled at the sides.. Tkopidopsis Ashm., gen. nov. 

 Musonotum with 2 furrows. 



Club o-jointed liuorvi'A Forster 



5. Mesonotum with 2 furrc ws. 



Stigma with a stigmal vein; abdomen witli S sulci at base. 



Ankukhynchus Westw. 

 Stigma without a stigmal \ cin ; abdomen witli a single sulcus at base. 



Labolits llaliday 



MALKS. 



Antenna' 14 -jointed 3 



Antenna' l.S-jointed. 



Mesonotum without furrows 2 



Mesonotum with furrows. 



Metathorax armed at base with a curved spine. 



Flagellar joints very long, cylindrical Hoi'Loi'KiA, Ashm., gen. nov. 



Metathorax not arine«l at base with a curved spine. 

 First flagellar joint not half as long as the secoml. 



Masai vein absent ; costal cell closed Pakamesius Westw. 



First flagellar joint as long or longer than the second. 

 Jlescuiotuiri not longer than wide. 

 Costal cell open; basal nervure present. 



Stigmal vein much longer than the marginal Hkmilkxis Forster. 



M«'sonotum longer than wide. 



Costal cell closed; basal nervure present. 



Abdomen with sulci at base Idiotv i-a Filrster. 



Abd(uuen without sulci at base Sl'iLOMlCKUS Westw. 



2. Hasal newiin^ |)res<'nt; costal cell closed. 



Base of second segnn^nt overla]»]»ing the ap<'x of i»eti(de (Simi.oMICRUS.) 



Hasal nerv: .o absent; costal cell open or at least «»peu iit base. 



Flagellar joints long, cylindrical, pilose, the lirst longer than the second. 



Hkmilkxoiiks Ashm., gen. nov. 



3. Submarginal vein not 'eacliiug the costa, ending in a stigma 4 



Subuiiirgiual vein reaching the costa. 



iJasal nervure wanting. 

 Mesonotum with 2 furrows. 



Eyes hairy Synacka Forster. 



Mesonotum without furrows. 



Flagellar joints elliptic-oval Tr(»I'II>oi\sis Ashm., gen. nov. 



4. Stigma with a stigmal vein Aneukhvnchus Westw. 



