no Claude Fuller 



as taken from the clypeo-frontal suture, to the head width between 

 the eyes. In the rounder-headed group with pallid venters the 

 head width stands to the head length as 20:32, in the other 

 group, as 20:35. 



All Trinerviterjnes I have observed, certainly all those enu- 

 merated here, are nocturnal harvesters of grass and grass seeds and 

 store hay in their many-celled nests. All except pretoriensis sp. n. 

 are mound builders; this species makes hollows beneath fairly 

 large stones and there makes a cellular nest. Among the mound- 

 builders only one makes a mound that can be said to be typical 

 of the species; this is k^rumai^ensis sp. n. The mound nest of 

 this insect is columnar, swollen at the top and usually six feet 

 high. The mounds are as a rule obliquely upright, leaning away 

 from the prevailing wind and, from a distance, look like tree 

 stumps. 



Trinervkermes trinervoides Sjostedt (1913a). 



There is no doubt in my mind that the insect herein characterized 

 is Sjostedt's species. My material is from Willowmore in the 

 lower Karroo as is the type locality, Laingsberg. 



Locality: De Vlakte, V/illowmore, (F. Thomsen, November 

 1920, all castes from one nest). Shaw Park, Bathurst (D. Gunn, 

 November 1920, three nest series, all castes). 



Trinervitermes gemellus Sjostedt (1904). 



? = Eutermes trinervius (in part) Hagen (1858). 



For reasons already stated I regard this Stellenbosch and Cape 

 Flats species as the imperfectly defined gemellus of Sjostedt.. 

 The insect reported from the Cape by Hagen may prove to be 

 gemellus on a scrutiny of the posterior margins of the meso- and 

 metanotum. 



Locality: Elsenberg, Mulder's Vlei (F. Petty, November 

 1918; six nest series, all castes). 



Trinervitermes gemellus form k^laharicus Holmg. 

 = Trinervitermes k^daharicus Holmgren (1913). 



Represented by a nest series from Springbok, Klein Namaqua- 

 land, (Rev. Kling, November 1918) this should be the insect 



