ETHIOPIAN NASUTITERMITIN \i: 



i°3 



M tuor Soldiers : 



Head length to tip of nose 

 Head width . 

 Depth of head capsule 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 



Range 



Mean 



i\5i 

 064 

 052 

 041 

 019 

 119 



1 35-1 79 

 0-55-0-80 

 0-45-0-64 



0-35-0-47 

 0-15-0-22 

 1-08-1-33 



\' aviation. In the imago caste this is comparatively slight, whereas in the soldier there is 

 considerable variation in profile view, both in degree of straightness, and in the shape of the nose. 

 The latter arises mainly from differences in the point at which the curved taper begins, resulting 

 in approximately conical, inverse trumpet-shaped, or almost cylindrical forms : there is some- 

 times also a slight hump at the base of the nose. The vestigial soldier mandibles occasionally 

 bear small points. This appears to be a species more tolerant of higher altitudes up to 5,000 feet, 

 and these specimens are larger than those from lower down. 



The imago is readily distinguished from sympatric congeners in nearly all cases by 

 the 15 segmented antennae, those few T. togoensis which have only 15 segments 

 usually having III partially subdivided on at least one side, and shorter female 

 cerci. The East and Central African species T. rhodesiensis and T. rapidum are not 

 easily separable from T. occidentalis. T. rhodesiensis usually lacks small depressions 

 on the frons, 50% of specimens have 16 segmented antennae, and the eyes are 

 relatively smaller in many cases. The characters given in the key are sufficient in 

 the majority of cases to distinguish T. rapxdum. In the soldier caste, the large 

 fontanelle and hairy nose tip distinguish T. occidentalis from the other two species. 

 The latter character was not recognized in an earlier paper (Sands, 1957) with 

 the result that specimens of T. rhodesiensis were attributed in error to T. lutzi, now 

 found to be a synonym of T. occidentalis. 



A lectotype has been selected for the junior synonym T. auriterrae as indicated 

 below. 



Type Material. Portuguese Guinea : Bissau, 4.x. 1898 (H. Ehrhardt), syntype 

 cj and $ imagos, T. occidentalis (Sjostedt), A.M.N.H. (Other syntypes in Mus. 

 Hamburg and Naturhist. Riksmus., Stockholm.) 



Ghana : Keta, 1926 (W. H. Patterson), lectotype soldier and paralectotypes, 

 T. auriterrae Sjostedt, B.M.(N.H.) (other paralectotypes from type colony in the 

 Naturhist. Riksmus., Stockholm). 



Congo : " Haut Uele " Mauda, 1925 (H. Schouteden). From the dates of 

 Schouteden's travels in 1925, Mauda must be near to Arebi since he was in both 

 localities on the same day. Arebi is in the Kibale-Ituri district, not the adjoining 

 Haut Uele as stated by Sjostedt. Syntype soldier, type colony, T. maudanicus 

 Sjostedt, B.M.(N.H.) (other syntypes in Mus. Tervuren, Naturhist. Riksmus., 

 Stockholm, and A.M.N.H.) ; Garamba, vii.1912 (H. Lang and/. P. Chapin), para- 

 type soldiers, type colony, T. bettoniamis s. sp. sidciceps, Emerson, A.M.N.H. 

 (Holotype in A.M.N.H.) ; Niangara, 3 40' N., 26 50' E., 20.V.1913 (H. Lang, 

 J. P. Chapin), paratype soldiers, type colony, T. lutzi Emerson, B.M.(N.H.) and 

 A.M.N.H. (Holotype soldier in A.M.N.H.) 



