Species of CnrcnVwrndse from Africa. 397 



(G. A. K. M.— type). N.W. Rhodesia : \ S , Chilanga, 

 1913 (B. C. Wood). Tanganyika Territory : 1 c? , Usaiigu 

 District, 3500-1500 ft., xii. 1910 {Dr. S. A. Neave). 



The single male from Tanganyika Territory has the 

 rostrum slightly longer and more slender than in the 

 southern specimens. 



As might be anticipated in such an isolated form, the geni- 

 talia present various peculiar features. In the male (text- 

 fig. 6) the median lobe is a stout gouge-like structure, 

 convex above and concave below ; at the orifice it is strongly 

 and abruptly constricted to form a setose lower lip, which 

 is covered by a movable spatulate process arising from the 

 dorsal edge of the orifice ; the struts are unusually broad 

 dorso-ventrally, plate-like, and slightly concave on the 

 internal face. The sac is contained entirely within the body 

 of the median lobe, and appears to l)e quite simple and 

 without asperities. The tegmen is also veiy remarkable ; 

 instead of the usual vertical circular ring witli a strut at 

 right angles to it, the ring is exceptionally large and oval, 

 lying almost horizontally in a position of rest, and the short 

 broad gouge-like strut is in the same plane with it. Another 

 striking feature is the complete absence of the spiculum. 

 The 6th venti'ite is only lightly chitinized on its apical half, 

 which is deeply sinuate in the middle and entirely devoid 

 of setse. 



The female (text-fig. 7) has the bursa copulatrix abruptly 

 dilated into a balloon-like sac, the duct to the receptaculum 

 seminis emerging before the dilatation ; the minute and 

 scarcely chitinized apical palps are enclosed within the 

 closely appressed sides of the unusually long and compressed 

 6th ventrite which has a long strut. The 8tli tergite, which 

 is also unusually long and narrow, is much more firmly 

 attached than usual to the 6t!j ventrite, and this structure 

 suggests that these two sclerites function together as an 

 organ of oviposition. 



The absence of the spiculum in the male is such an 

 exceptional character that I sent a male to Dr. David Sharp 

 for dissection, and he has kindly confirmed the point, 

 adding that in his numerous dissections of male Ciircu- 

 lioniche he has noted the absence of the spiculum only in 

 certain genera of Calandrince, which accords M'ith my own 

 much more limited observations. Dr. Sharp also remarks 

 that the structure of the median lobe in this sjjecies is quite 

 unlike anything else that lie has seen. 



