34 KOBERT NEWSTEAD. 



Length, between the extremities of the cones, 4 '5 mm. ; height of middle line, 

 2 mm. Young adults measure : 2*2 mm. between the extremities of the cones, and 

 1 *5 mm. along the middle line of the dorsum. These may be taken as average 

 measurements. 



Female, adulL Shape similar to that of the test, but shrivels on drying, so that the 

 test readily falls away in two parts. Antennae (fig. 22 c, c) of seven or eight segments ; 

 in the former case the 4th is the longest, but invariably bears one or more partial 

 divisions ; in those having eight segments the 3rd is the longest. Stigmatic clefts 

 obsolete, the position occupied by a single long spine (fig. 22, d) which is equal in length 

 to two-thirds of the antenna ; it is sometimes strongly curved at the end. Stigmata 

 just within the margin and between them three to four circular pores. Marginal 

 spines (fig. 22, d) in an irregular row, and of two sizes ; all are conical and sharply 

 pointed. Anal orifice surrounded by a very long loop-shaped band of dense chitin. 

 Anal lobes pointed ; inner edge with two tubercular projections ; the tubercles and 

 the tip each with a spine, and there is also a very large spine attachment in the middle 

 of the apical projection. Anal ring with six hairs. A narrow line of dorsal pores 

 extends from the anal lobes to the region of the proboscis ; the latter relatively 

 small and the mentum monomerous. 



Uganda : Nagunga, on stems of cacao pods and flowers, 18 . ix . 15 (C. C. Gowdey). 



In the form of the test this species bears a close resemblance to I. castilloae, Green,* 

 but differs in having the ends truncated, in the absence of the " deep transverse 

 furrow extending downwards from the apex of each cone " and the " rounded lips " 

 forming the border behind and in front. Furthermore, the female of I. castilloae 

 has no stigmatic spines, and the antennal characters are also different. 



* Jour. Econ. Biol., vi., p. 29, pi. i. (1911). 



