24 Transactions. — Zoology. 



long and subequal except the first two, which are short and 

 thick: numerous hairs on all the joints. Dorsal eyes, four ; 

 ventral eyes, four : ocelli, two. 



Hah. In Australia, on Atriplex sp. {A. halimus ?) : specimens 

 from Mr. French. 



This insect differs from S. hizidcz, Dufour, in the form of its 

 sac, in its scarcely-elongated form, in the character of the 

 dermal spines, fringe, and spinnerets, and a few other par- 

 ticulars. The male of the European species does not seem to 

 have been observed. 



Genus Ekiochitox, Maskell. 



Eriochiton cajani, sp. nov. 



This is an insect infesting Gajanus indicus (pigeon-pea) 

 in India. The late Mr. Atkinson sent me specimens, of which 

 I returned descriptions and figures not yet published. The 

 species has a more permanent sac than others of the genus, 

 but I placed it therein rather than in the allied genus Sig- 

 noretia, on account of the seven-jointed antenna. An abnormal 

 feature is that iu the larva the tibia is longer than the tarsus. 



Group COCCIDIN^. 

 Subdivision ACANTHOCOCCID^. 

 Genus Planchonia, Signoret. 

 Planchonia styphelise, sp. nov. Plate III., figs. 10-18. 



Test of adult female very closely felted, so as to appear 

 almost waxy ; convex above, flat beneath ; elongated oval, 

 slightly tapering posteriorly ; colour whitish, or with a very 

 faint greenish tinge : length about ^T^n. At the posterior 

 extremity the upjser portion is slightly elevated, so as to leave 

 a small orifice. All round the margin there is a double fringe 

 of longish, white, glassy, slender tubes, one row above the 

 other, the lower row being rather the longer and in pairs. 



Test of male glassy ; colour white, with a faint yellowish 

 or greenish tinge ; elongated, slightly convex : length about 

 ^\in. : round the margin there is a single fringe of glassy- 

 tubes in pairs. 



Adult female at first filling the test ; elongated, convex ; 

 colour brown : shrivelling at gestation towards the cephalic 

 extremity. Antennae and feet entirely absent. Mentum 

 dimerous. Anal tubercles present, but very small and incon- 

 spicuous ; anogenital ring small, compound, with apparently 

 six short hairs. All round the margin is a row of figure-of-8 

 spinnerets, and within it a row of single circular orifices. 



Larva yellowish-brown, active, flattish ; elongated, taper- 

 ing slightly posteriorly : length about ■gjj'm. Anal tubercles 



