12 ACLEKDA JAPONICA. 



trum immediately below the anterior pair of spiracles. 

 Posterior pair of spiracles a little anterior to the 

 centre ; these organs (PL XXXVI, figs. 6, 6 a) are 

 comparatively large ; the opening, which is circular, is 

 surrounded by a crescent-shaped flange, which is 

 thickly set with circular spinnerets, and the inner 

 basal portion is composed of a network of tubes. 

 Anal cleft (PL XXXVII, fig. 2) short, apex forming 

 more or less distinct angular processes, quite spine- 

 like in some individuals ; dermis on either side strongly 

 chitinised, crenulated at the margins, and just within 

 the latter an irregular series of circular spinnerets 

 divided from each other by irregular wavy striae. 

 Anal orifice (PL XXXVII, fig. 3) with twenty to 

 twenty-four very long flat hairs, so arranged at the 

 base that they touch each other and form a section of 

 about two thirds of a cylinder ; the ring itself is 

 attached to a large hemispherical organ which lies 

 within a large cavity. In some individuals there are 

 from four to six curious flattened hairs with emargi- 

 nate ends proceeding from the cleft, and appearing to 

 be attached to the hemispherical organ supporting the 

 anal ring. Dermis at the margins with many acorn- 

 shaped spines (PL XXXVI, fig. 7), some of which are 

 hollow secreting organs attached to large subcutaneous 

 tubes leading inwards from the spine (fig. 7 a) ; the 

 spine sometimes breaks away, leaving a circular 

 capitate extremity (fig. 7 b). 



Habitat. Beneath the leaf-sheaths of the food- 

 plant (Arundinaria japonica), causing the sheaths to 

 swell out at those parts which cover the insects. 

 Under glass ; Broxbourne, Herts, on imported 

 plants. Received from the Editor of the ' Gardener's 

 Chronicle,' Dr. Maxwell T. Masters, 26th January, 

 1899. The insects were living together with Antonina 

 socialis, Newst., from which they cannot be distin- 

 guished without microscopical examination. 



The extraordinary vitality of a female of this 

 species is certainly not the least remarkable feature 



