Geological Society. 219 



with slightly curvt'd entl. About each group of spines are 

 massed lliiily to tliiny-tive small round spiunerets. A nunber 

 of jiliort spines are scatterc'il »»vcr the dorsal and ventral sui faces 

 of the (Icrm. 



IJab. Ypiraujra, State of S. Paulo. On the t\vi<]f3 of 

 Canipomaiiesia sp., a bush common on the " campos." 



Genus Pseudokermes, Ckll. 

 Vaeudokeruies nitens, Ckll. 



Male scale small, elliptical, convex, white, thin and very 

 frail. The dorsum and margin are ornamented with several 

 small tubercles. The posterior end is recurved and carries on 

 the dorsal surface a small flat round plate, which is pushed 

 off when the male emerges. Length 1*25 millim. ; width 

 •50 millim. 



Adult male dimorphous, some individuals being winged, 

 others wingless. The botly is dark brown, oval, widest 

 across the thorax, truncated behind. Total length TO-tl 

 millim., width '410 millim. Length of genital spike '312 

 millim. The winged f)rm emerges about a week or ten days 

 after the other. The antennas are hairy and of ten joints, the 

 last joint terminateJ by two long knobbed hairs. Wings 

 orilinary; no lialteres were found. Head small, with four 

 ocelli. Genital spike broad and Hat, obtusely pointed. L.igs 

 long, slender, and hairy. Claw long and slightly notched. 

 The four digitules are slender and knobbed; the tarsal 

 digitules do not extend to the tip of claw. In the wingless 

 form the antennae are 9-jointed, otherwise the two forma 

 agree. 



Ilab. Rio Grande do Sul and S. Paulo. On the twigs of 

 Myrtus (^Blepharocalyx) Tioeediiy Puidiiim sp., and other 

 plants. 



[To be continued.] 



PROCEEDINGS OF LEARNED SOCIETIES. 



GEOLOGICAL SOCIETY. 

 June 20th, 1900.— J. J. H. Teall, Esq., M.A., F.R.S., 

 President, in the Chair. 

 The following communications were read : — 

 1. 'On the Skeleton of a Thcriodont Keptile from the Baviaans 

 Kivor (Cape Colony).' By Prof. H. G. Seeley, E.R.S., F.L.S., 

 V.P.G.S. 



The fossil described in this paper was discovered by Mr. W. Pringle 

 at Ealdon, in the bed of the Baviaans River, a tributary of the Great 

 Fish River. It is now preserved in the Albany Museum. The slab 

 contuiuing it is of hard siliceous sandstone, atid is 31 inches long bv 



