— 24° — 



side the upper surface is rather evenly convex, without démarcation 

 between the anterior and dorsal aspect. Edges of the tergites more 

 or less obscurely punctured; the middle of their disk largely impunc- 

 tate and shiny, excepting on the last two. First sternite with a pro- 

 minent, médian carina, elevated and eut off at right angles, posteriorly. 

 Last tergite with a médian, impunctate, longitudinal ridge, slightly 

 depressed towards its apex which forms an elevated platform, ter- 

 minating in the spreading arms of a vertical Y-shaped carina; the stem 

 of this carina is set on the middle of the posterior edge of the segment. 

 The surface of this longitudinal, pygidial élévation is obliquely striate, 

 the stria; converging toward the tip. Second sternite simple. Sixth 

 sternite totally unarmed laterally. Seventh sternite nearly as broadly 

 exposed as the sixth, with a low, oblique, latéral ridge. Last sternite 

 with rather flattened, oblique ridges which strongly converge poster- 

 iorly, each forming at its tip a rounded tooth and terminating much 

 anterior to the end of the segment; behind them the surface of the 

 segment is depressed, membranous, and densely hirsute. 



Habitat : Belgian Congo; one maie, Albertville, December, 1918 

 (Holotype. — R. Mayné); one maie, Lukuga River, Niemba, Decem- 

 ber 1917 to January 1918 (Pons); one maie, Mpala (R. Mayné). 



Holotype and one paratype (Mpala), Congo Muséum, Tervueren; 

 one paratype (Niemba), Cornell University, No. 658. 1. 



In Bischoff's key this species would run to divisa subsp. miniaticeps 

 Bischoff, with which, however, the agreement can only be super- 

 ficial. We hâve before us a spécimen of the subspecies klugiana 

 André of divisa and find that it differs from lukugensis in essentia 

 structural characters as follows : the upper, elevated portion of the 

 clypeus is uniformly convex above and ends below in a transverse, 

 abrupt and medially subacute ridge; the disk of the clypeus is without 

 the médian, preapical, small tubercle; the margin of the clypeus is 

 not quite truncate, but weakly bilobed; its edge not reflexed and with- 

 out latéral teeth or carina;; the scutellum is much less strongly ele- 

 vated; the mesopleura; hâve an upper and lower swelling as in 

 lukugensis, but thèse are much less pronounced and the dépression 

 between them smaller; the lower one is rounded instead of sharp below; 

 ventral surface of mesopleura; anteriorly with an oblique, smooth, 



