Range 



Mean 



i 43-1 75 



1-59 



0-85 [13 



098 



0-55-078 



o-68 



0-40-0-57 



049 



0-18 0-24 



019 



1-05-1-36 



112 



ETHIOPIAN NASUTITERMITINAE 49 



Head capsule in plan view short oval to circular, nose conical with abruptly tapered tip. In 

 profile distinctly concave, often with slight hump at base of nose, back of head raised and 

 rounded. Xose shorter than rest of head capsule, measuring from hind margin of antennal 

 socket, in all but smallest specimens ; angle of nose cone 12 15 degrees ; postmentum moder- 

 ately ami evenly convex ; antennae i> 14 segmented, commonly 13, II and IV subequal, 

 shorter than V, III longer than V. Head setae consist of a bilaterally placed pair on vertex, 

 not always present, a distinctly hairy nose tip, and a few on anterior margin of postmentum ; 

 rarely one or two minute setae scattered on rest of postmentum, and usually a few on vertex. 



Abdominal tergites with very short scattered setae, and longer setae in lour rows on posterior 

 margins of last four segments ; sternites with s( uttered shi >rt setae, and six long setae on posterior 

 margin of each segment. 



Measurements (39 specimens from 9 localities) in millimetre-, 



Head length to tip oi nose 

 Head width .... 

 Depth of head capsule . 

 Width of pronotum 

 Length of pronotum 

 Length of hind tibia 



Variation. Sjostedt (1924a] recorded specimens of .V. putidus ranging in size up to head 

 length 1 96, w ulth 1 35, and depth 0-85 millimetres ; no such measurements have been encoun- 

 tered from a wider range "I specimens, including paratypes from type colony. The latter fall 

 outside the range given by Sjostedt, and I therefore consider that his measurements, though not 

 impossible, are probably incorrect ; particularly since the measurement of head width for .V. 

 kotuluensis is given us 1-35111111 , for a length of 1-63111111. and a depth of o-6omm., and would 

 thus be of quite different proportions from all the other specimens if correct. Paratypes from 

 type colony of .V konduensis measured o-Q5mm. in width for a length of 1 -58mm. 



N. schoutedeni was described four times under different names in the same paper 

 by Sjostedt (1924), three times on the same page, and once again in another paper 

 the same year (1924b). The name chosen has page priority, and is not otherwise 

 inappropriate. 



It is most closely related to N. latifrons, which it closely resembles in the soldier 

 caste, but is distinguishable by the presence of vertex setae, and the absence of 

 postmentum setae except on the anterior margin (with rare exceptions). The imago 

 is smaller, and the wings have setae distributed more or less evenly over membrane 

 and veins, whereas in N. latifrons the veins carry a distinct row of setae with a bare 

 border on each side. 



The smallest soldiers of N. schoutedeni have a straighter head profile, and closely 

 resemble N. litjae ; some specimens are probably indistinguishable, but N. 

 schoutedeni usually has a more abruptly tapered and closely hairy nose tip. The 

 imago is also very like that of N . lujae, but larger, with the ocelli closer to the eyes, 

 and the wing membrane is less hairy with larger more distinct asters. 



Type Material. Congo : Basongo, vii.1921 (H. Schouteden), syntype soldier, 

 type colony, N. schoutedeni (Sjostedt), A.M.N.H. (other syntypes in Naturhist. 

 Riksmus., Stockholm) ; Kasai, Kondue (E. Luja), syntype soldier, type colony, 

 N. putidus (Sjostedt), A.M.N.H. (other syntypes in Congo Mus., Brussels) ; Luebo, 

 ix.1921 (H. Schouteden), syntype soldier, type colony, N. aethiops (Sjostedt), 



