156 W. A. SANDS 



in the median sorting. In the vector analyses it seems not so much an outlier as 

 a genus which is isolated by falling in a 'gap' in the hyperspace. It has an unusual 

 combination of values for the first five or six principal co-ordinates, although no 

 individual value in any vector approaches the extremes. 



Apagotermes stolidus sp. n. 



(Text-figs 390-399; PI. 4, figs 1 & 2) 



Imago. Head capsule sepia-brown, darker above ocelli, fontanelle very small, almost 

 vestigial, elongate oval, very slightly raised, brown; medial spot elongate oval, equal to fontanelle 

 or slightly smaller, raised on small bump, coloured as head; postclypeus brown, labrum pale 

 yellow-brown; frontal marks weakly developed, rather indistinct, flat brown crescents; antennae 

 yellow-brown. Pronotum brown, meso- and metanota yellow-brown; femora pale yellow- 

 brown, tibiae and tarsi yellow. Abdominal tergites brown, dorsal stigmata paler, sternites and 

 ventral stigmata pale brown ; middles of sternites and cerci yellow. 



Posterior margin of head capsule slightly undulating, not evenly rounded ; ocelli moderately 

 large, separated from compound eyes by about two-fifths own least diameter; postclypeus very 

 weakly inflated, Pcl/W, 0-21, posterior margin indistinctly arched, median suture absent. 

 Pilosity of head capsule dense, somewhat uneven but almost forming a rough pelt with numerous 

 irregular emergent setae. Other characters in generic diagnosis. 



Measurements (two specimens, one locality) in millimetres. 



Head width across eyes (W) . . 074 



Ocellus (O w X Oi) . . . 0-07 x 009 



Ocellus to eye (O-E) . . . 003 



Postclypeus length (Pel) . . 0-15-0-16 



Antennal article III . . . 0-02 



Antennal article IV 0-03-004 



Antennal article V . . . 0-04 



Left mandible, apical to first 



marginal (La) ■ • • 0-06-0-07 



Left mandible, first to third mar- 

 ginal (Li) .... 0-12 



Left mandible, third marginal to 



molar (L m ) . . . 006 



Right mandible, apical to first 



marginal (Ra) .... 0-07 



Right mandible, first to second 



marginal (Ri) .... 0-09-0-10 



Right mandible, second marginal 



to molar (R m ) • • • 0-05-0-06 



Mesonotum width (M) . . . 0-16 



Metanotum width (N) . . . 0-16-0-17 



Worker. Head capsule yellow, pilosity orange-yellow, fairly numerous but not dense 



short, not conspicuous. Postclypeus weakly inflated, Pcl/W, 0-25, Pcl/Ri, i-8o. Othei 

 characters given in generic diagnosis. 



Measurements (one specimen) in millimetres. 



Head width (W) 058 



Fore tibia width (T w ) .... o-io 



Fore tibia length (Ti) .... 0-38 



Postclypeus length (Pel) . . . 0-14 



