OF WASHINGTON, VOLUME XIII, 1911. 221 



3. Third pleural suture strongly curved, the upper part of 



the metaepisternum very narrow; mesoepimeron with 

 an oblique carina dorsally; anal cell of the fore wings 

 contracted basally and with an oblique cross-vein; 



second transverse cubitus normally wanting Dolerinaz 



Third suture straight; mesoepimeron without an oblique 

 dorsal carina; anal cell of the fore wings not con- 

 tracted basally, and either meeting near the middle or 

 with a straight cross-vein; all the transverse cubiti 

 normally present Tenthredininse 



4. Basal vein and first recurrent vein sub-parallel, the 



first recurrent being subequal in length with the basal 



vein 5 



Basal vein and first recurrent vein strongly diverging, 

 the first recurrent being much shorter than the basal 

 vein Messinse 



5. Third plural suture biangulate; metaepisternum Z-shaped, 



very narrow; metaepimeron very large, rectangular 

 with the wing process projecting anteriorly; antennae 



more than 10-jointed; labrum very long Athaliinse 



Third plural suture straight or nearly so; metaepisternum 

 and metaepimeron of a normal type; antennae 9- 

 jointed; labrum normal Empriinse 



6. Basal vein and first recurrent vein subparallel, the basal 



vein and first recurrent vein being subequal in 



length 7 



Basal vein and first recurrent vein strongly diverging, 



the first recurrent being much shorter than the basal.. 8 



7. Metapostnotum linear, usually concealed medially; anal 



cell of the fore wings petiolate (first anal cell only 



present) Phymatocerinse 



Metapostnotum large, present medially; anal cell of the 

 fore wings complete, open or with a cross-vein (first 

 and second anal cells present) Selandriinse 



8. Basal vein joining the costa at or close to the origin of 



the cubitus Cladiinx 



Basal vein joining the costa remote from the origin of 



the cubitus 9 



9. Metaepimeron with a small, curved dorsal plate which 



usually projects laterally beyond the lower part of the 

 small plate; third pleural suture strongly curved... Nematinse 

 Metaepimeron without a dorsal plate; third pleural suture 

 straight; (transverse radius present; anal cell con- 

 tracted in the middle; second and third cubital cells 

 each receiving a recurrent vein) Hoplocampime 



