THE SOLDIERLESS TERMITES OF AFRICA 153 



armature consists of regularly arranged spines, those below the outermost row 

 being slightly spatulate. In the cluster analysis Amicotermes is placed near Aderito- 

 termes. This genus, however, has a long mixed segment and distinctive enteric 

 valve-armature in the worker caste, shorter mandibular apical teeth in both castes, 

 and regular pilosity forming a pelt on the head capsule of the imago. Adynato- 

 tertnes has similarly long apical teeth but is otherwise very different, not least in 

 size. 



Since the decision to separate Amicotermes as a monotypic genus was taken a 

 second species has been discovered in West Africa. This is known only from the 

 worker caste, and is therefore not described here, as in other genera where the same 

 thing has happened. The occurrence of these extra species in monotypic or small 

 genera is interesting because they strengthen the conviction that the generic group- 

 ings used here will form a valid and stable basis for their future classification. 



Amicotermes galenus sp. n. 



(Text-figs 380-389; PI. 3, figs 7-10) 



Imago. (CJucen, colours possibly faded.) Head capsule sepia-brown, darker above ocelli; 

 fontanelle flat, short oval, pale yellow, about half size of ocellus; medial spot circular, flat, 

 slightly smaller than fontanelle, coloured as head; postclypeus brown, labrum yellow; frontal 

 marks semicircular, flat, brown; antennae pale yellow-brown. Pronotum brown, meso- and 

 metanota yellow-brown, femora and tibiae yellow, tarsi paler. Abdominal tergites yellow- 

 brown, dorsal stigmata paler, sternites pale yellow-brown, ventral stigmata and middle fo 

 sternites paler; cerci yellow. 



Posterior margin of head capsule evenly rounded; ocelli medium-sized, separated from com- 

 pound eyes by somewhat less than own least diameter; postclypeus strongly inflated, Pcl/W, 

 °'33> posterior margin rather angularly arched, median suture distinct. Pilosity of head capsule 

 very dense, yellow-brown, somewhat uneven, almost forming a pelt but obscured by many 

 emergent setae. Other characters in generic diagnosis. 

 Measurements (one specimen) in millimetres. 



Head width across eyes (\V) . . 101 



Ocellus (O w x Oi) . . . 0-09 x 012 



Ocellus to eye (O-E) . . . 007 



Postclypeus length (Pel) . . 0-34 



Antennal article III . . . 004 



Antenna 1 article IV . . 005 



Antennal article V 005 



Left mandible, apical to first mar- 

 ginal (L A ) • • • • 0-14 

 Left mandible, first to third mar- 

 ginal (Li) .... 014 

 Left mandible, third marginal to 



molar (L m ) .... 0-07 



Right mandible, apical to first 



marginal (Ra) .... 0-14 



Right mandible, first to second 



marginal (Rj) .... 010 



Right mandible, second marginal 



to molar (R m ) • • • 0-07 



Mesonotum width (M) . . . 0-29 



Metanotum width (N) . . . 0-30 



