i2o W. A. SANDS 



Comparisons have already been made between A. mansuetus and A. aneristus, 

 A. apocnetus and A. hilarus. The large eyes and ocelli that characterize A. pacatus 

 in the imago have also been mentioned. In the worker caste this species differs 

 from A. mansuetus in having a very slender fore tibia, shorter mandibular apical 

 teeth, and a two-lobed dorsal enteric valve seating. A. prosenus has longer apical 

 teeth in both castes; the worker caste also has a more slender fore tibia, and a shorter- 

 necked enteric valve seating. In the few specimens of the worker caste of 

 A. mansuetus that are available there is no sign of abdominal dehiscence. 



Holotype <$ imago, paratype <$ and workers from type-colony, Kenya: 4 miles 

 from Kaptagat on Eldoret Road, 13. v. 1954 (R. M. C. Williams Coll. No. RW43) 

 in British Museum (Natural History). 



The single type-nest-series was found in a mound of Cubitermes sp. 



Astratotermes pacatus (Silvestri) comb. n. 

 (Text-figs 276, 277, 282, 283 & 292-297; PI. 2, fig. 3) 



Anoplotermes pacatus Silvestri, 1914 : 54. LECTOTYPE $, Guinea: Kindia. (Silvestri 

 Coll., Istituto di Entomologia Agraria, Naples) here designated [examined]. 



Anoplotermes sedalus Silvestri, 1914 : 55. LECTOTYPE $, Congo (Brazzaville): Brazza- 

 ville. (Silvestri Coll., Istituto di Entomologia Agraria, Naples) here designated [examined]. 

 Syn. n. 



Imago. Head capsule sepia-brown, not darker above ocelli; fontanelle medium-sized, but 

 less than half as large as ocelli, oval, flat, pale brown; medial spot very small, almost obsolete 

 broad oval, brown; postclypeus brown, labrum yellow; frontal marks small, flat, semicircular, 

 brown, antennae brown. Pronotum sepia-brown, meso- and metanota brown, transverse 

 sutures present, legs, femora yellow-brown, tibiae paler, tarsi yellow. Abdominal tergites 

 sepia-brown, dorsal stigmata pale yellow-brown, ventral stigmata similar, sternites pale brown 

 laterally, paler middle, cerci yellow. 



Posterior margin of head capsule widely arched, slightly undulating; ocelli and compound 

 eyes large, separated by up to one-third least diameter of ocellus; postclypeus weakly inflated, 

 Pcl/W, 0-19-0-23, posterior margin arched or sinuate, not evenly rounded, median suture 

 present, not always complete. Apical teeth of mandibles short, La/Li, 0-46-0-60, Ra/Ri, 

 0-58-0-78; subsidiary marginal tooth of left mandible just clear of molar prominence in surface 

 view, complex ratio La/Li. L m , 4-70-8-11, points of apical and marginal teeth of right mandible 

 approximately in line, anterior edge of first marginal nearly twice length of second. Meso- 

 and metanota moderately wide at constriction, M/W, 0-29-0-32. Pilosity of head capsule 

 close and even, forming a pelt with longer emergent setae. 



Measurements (seven specimens from four localities) in millimetres. 



Head width across eyes (W) 

 Ocellus (O w x Oi) . 

 Ocellus to eye (O-E) 

 Postclypeus length (Pel) 

 Antennal article III . 

 Antennal article IV . 

 Antennal article V . 

 Left mandible, apical to firs 

 marginal (L A ) 



Range Mean ± S.D. 



0-98-1-21 1-062 ± 0090 

 011-014 x 0-14-0-19 0118 ± 0013 x 0154 ± 0-015 



002-004 0030 ± 0-006 



0-21-0-23 0-226 ± 0-007 



004-007 0050 ± 001 1 



005-008 0060 ± 001 1 



005-008 0059 ± 0010 



0-08-0-09 0-085 i 0-003 



