OBSERVATIONS ON SOME SOUTH AFRIOAN TERMITES. 427 



right ; with thi-ee teeth, of which the first is acute and the 

 largest, the third the smallest with a faintly sinuate, tri- 

 curvate edge; also with a strong basal process, below which 

 the margin tapers and is incurvate and then curvate. The 

 right jaw with two teeth, both of which are larger than tlie 

 first two of the left jaw, the cutting edge of the second long 

 and wavy; margin below the second tooth with three incisions 

 and two well-defined scallops ; margin extending obliquely 

 outwards. 



Antennae pale yellow-brown throughout; whip-like; joints 

 I and II forming the handle, the rest a fusiform thong ; 

 joint I inset below the hood of the froutal carina ; of about 

 XXVIII, XXIX, or XXX joints ; III, IV, and V usually sub- 

 equal and the narrowest and shortest of the series ; VI to 

 apical increasing and then decreasing in length ; from VII 

 or VIII to the fourth to sixth apical joint the width is 

 generally constant, the apical series tapering slightly ; from 

 VI the lengths gradually increase to a maximum which may 

 be reached between XIII and XVI ; apical joint always 

 shorter than the penultimate and often decidedly narrower ; 

 maximum length of longest joints about equal to that 

 of II. 



I, strong, cylindrical, apex with a distinct whorl of bristles ; 

 more than twice the length of II (range 400 to 500 fx) . 



II, strong, cylindrical, nearly as wide as long, wider than 

 any succeeding joint ; with an apical whoi'l of bristles and 

 scattered bristles on apical half (range 200 to 300 /u) . 



III, IV, V annular; less than half the length of II; III 

 anchylosed to II ; each with an apical whorl of bristles 

 (range 70 to 100 /z). 



VI annular ; longer than V ; with an apical whorl of 

 bristles (range 100 to 130 /x). 



VII longer than VI (100 to 150^) ; often with two Avhorls 

 of bristles. 



VIII and onwards, the first few joints globose, the middle 

 series obconic, the apical series elongated with almost parallel 

 sides and two whorls of bristles. 



VOL. 3, PART 2. 29 



