ETHIOPIAN NASITITERMITINAE 



99 



Map 22. Trinervilermes gratiosus. Vegetation types : 20, 24, 25, 26, and 27. 



inflated postclypeus, longer $ cerci, and ocelli nearer the eyes. The differing dis- 

 tribution is the only consistent feature on which to separate the soldiers, though the 

 majority of T. gratiosus are darker than T. oeconomus and paler than T. trinervins, 

 with a shorter nose than either. 



Type Material. Congo : Luluabourg, no date (P. Callewaert), syntype imagos 

 and soldiers, type colony, T. gratiosus (Sjostedt), Naturhist. Riksmus., Stockholm, 



