THE SOLDIERLESS TERMITES OF AFRICA 121 



Left mandible, first to third 



marginal (Li) . . . 014-019 0160 ± 0021 



Left mandible, third marginal to 



molar (L m ) .... 007-010 0080 ± 001 1 



Right mandible, apical to first 



marginal (Ra) • • • 008-009 0085 ± 0-005 



Right mandible, first to second 



marginal (Ri) . . . 011-0-15 0125 ± 0-016 



Right mandible, second marginal 



to molar (R ra ) . . . 006-009 0-077^0-011 



Mesonotum width (M) . . 0-29-0-39 0321 ± 0-039 



Metanotum width (N) . . 0-30-0-40 0-341 ± 0-032 



Worker : Head capsule yellow-white, pilosity sparse, yellow. Postclypeus weakly to moder- 

 ately inflated, Pcl/W, 0-22-0-29, Pcl/Rj, 1-65-2-38. Apical teeth of mandibles short, La/Lj, 

 0-40-0-49, Ra/Ri, 0-62-0-71; subsidiary marginal tooth of left mandible just clear of molar 

 prominence in surface view, complex ratio, La/Li. L m , 7-47-9-56; apical and marginal teeth 

 of right mandible approximately in line, anterior edges of first and second marginals equal, 

 Ra/Ri Rm. 8-86-13-92. Fore tibia very slender, Ti/T w , 5-77-7-08, third apical spur distinct. 

 Mesenteric overlap at junction with proctodeum diagonal, to right of malpighian knot; enteric 

 valve seating dorsal on right hand side of unopened abdomen, distinctly two-lobed, connected 

 to second pouch of proctodeum by short neck; membranous wall of valve beyond cushions 

 with minute spicules. 



Measurements (three specimens from three localities) in millimetres. 



Head width (W) .... 



Fore tibia width (T w ) 

 Fore tibia length (Ti) 

 Postclypeus length (Pel) 

 Left marginal, apical to first marginal (La) 

 Left mandible, first to third marginal (Lj) 

 Left mandible, third marginal to molar (L m ) 

 Right mandible, apical to first marginal (Ra) 

 Right mandible, first to second marginal (Ri) 

 Right mandible, second marginal to molar (R m ) 



Range Mean 



0-78-0-93 0850 



009-012 0110 



0-56-0-85 0704 



0-19-0-25 0-215 



007-008 0073 



OI4-OK) 0161 



005-006 0055 



007-008 0073 



0-11-0-13 0-113 



005-007 0057 



The characters that distinguish A. pacatus from A. aneristns, A. apocnetus, A. 

 hilarus and A . mansuetus have already been given under those species. There only 

 remains the type-species of the genus, A . prosenus, to be compared. This is larger 

 than A. pacatus, with proportionately smaller eyes and ocelli, longer mandibular 

 apical teeth, and differently proportioned marginals on the right. It also has 

 a circular pale fontanelle. The worker of A. prosenus also has longer apical teeth, 

 more inflated postclypeus, and a slightly thicker fore tibia. The abdomen of the 

 worker caste is dehiscent in A . pacatus. 



Lectotypes have been designated from the existing syntype material of A . pacatus 

 (Silvestri) and A . sedatus (Silvestri) as indicated below. 



Type-material. Anopiotermes pacatus Silvestri, LECTOTYPE $ imago, para- 

 lectotype <$ imagos and workers from type-colony, Guinea: Kindia, io°N., I2°45'W., 

 21.viii.1912 (F. Silvestri), in Silvestri Coll., Istituto di Entomologia Agraria, Portici, 

 Naples. Anoplotermes sedatus Silvestri, LECTOTYPE $ imago, paralectotype <J 



