146 



W. A. SANDS 



or " mat 



oval, separated from eyes by about half own least diameter or slightly more ; postclypeus 

 moderately inflated, width about twice length, anterior margin sinuate, posterior convex, 

 evenly rounded ; antennae 15 segmented, II, IV and V subequal, III shorter. 



Pilosity of head rather even and dense, but not sufficently so to form a " pelt 

 pronotum and abdominal pilosity similar, longer towards margins of sclerites. 



Measurements (3 specimens from 2 localities) in millimetres. 



Range 

 Head width across eyes . . . 0-88-0-94 



Greatest diameter of eye 



Ocellus 



Ocellus to eye . 



Width of pronotum 



Length of pronotum 



Length of hind tibia 



0-33-0-35 

 008-009 X OI I- 



0-04-0-05 



073-079 

 0-49-0-54 



I 10-1-23 



0-13 



Soldier. Head capsule pale yellow to yellow, nose orange-yellow to orange, rest of body 

 cuticle pale yellow. 



Head capsule in plan view weakly constricted behind antennae, posterior margin evenly or 

 slightly angularly rounded ; nose thin, weakly conical. In profile undulating with distinct 

 hump at base of nose, to nearly straight with depression in front of evenly rounded posterior 

 lobe, highest point of hump vertically above middle of postmentum, and somewhat abruptly 

 depressed behind ; antennae, II, III and V subequal, IV shorter, antennal socket usually 

 with small ridge over dorsal rim. 



Conspicuous setae of head consist of six in three pairs in line across base of nose in front of 

 constriction, and six in three pairs similarly arranged on posterior lobe behind constriction. 



Measurements (7 specimens from 3 localities) in millimetres. 



Range Mean 



Head length to tip of nose 



1-25-1-40 





i-34 



Head width . 



0-61-073 





067 



Depth of head capsule . 



0-38-0-46 





042 



Width of pronotum 



0-34-0-38 





036 



Length of pronotum 



013-014 





013 



Length of hind tibia 



071-0-83 





074 



ruMus differs from E. bifit 



irtitus in the ima 



go in havin 



g the ocelli 



more distant from the eyes, and a differently shaped fontanelle ; the head capsule 

 has a slightly more broadly rounded posterior margin. The soldier of E. abruptus 

 has a thinner nose and more numerous head setae. Differences from E. aquilinus, 

 E. convergens and E. undulans are discussed under those species. 



Holotype $ imago, Congo : Njili, 18km. from Leopoldville, 11. vi. 1948 {A. E. 

 Emerson), in American Museum of Natural History. 



Morphotype soldier, same data, A.M.N.H. 



Paratype soldiers from type colony, same data, in A.M.N.H. and British Museum 

 (Nat. Hist.). 



Other paratype material. Congo : Sona Mpangu, 10. iv. 1948, soldiers and 

 workers, A.M.N.H. and B.M.(N.H.), and Camp Putnam, i° 24' N., 28 36' E., 

 18.V.1948, 2 vials, one containing soldiers and workers, and the other, two imagos 

 that flew to light {A. E. Emerson), allotype <J imago in A.M.N.H. 



