262 



[November, 



pygidiform process, bearing the anal aperture, projects upwards from the edge of 

 the dorsal convexity ; its extremity with a pair of stoutish setro, usually re flexed 

 and crossed over the ventral surface. Anal ring with six hairs, concealed in a re- 

 tractile tube at base of a shallow depression, with chitinous sides. Legs wanting. 

 Antennae represented by minute nodular tubercles. Spiracles large, surrounded by 

 scattered parastigmatic glands. Derm without other glandular markings. The 

 insect is often partially enveloped in the pellicle of the previous stage, which lines 

 the unoccupied part of the gall cavity, and shelters the eggs. 



Diameter, 1*50 to 2 mm. 



Male unknown in any stage. 



Living insects of 2nd stage not observed. 



Young larva oval, flat ; pale yellow. Margin with a series of large 8-shaped 

 pores ; four similar pores on dorsal surface of thorax. These pores give rise — in 

 the living insect — to stout, curling, glassy filaments. Legs and antennas normal, 

 the latter with terminal segment somewhat dilated. Anal ring with six hairs. 

 Anal lobes small, each bearing a stoutish seta. 



Hah. : On terminal twigs of the " Iron-wood tree " (Mfstin 

 ferrea). Kandy, Peradeniya, Ceylon. 



GEOCOCCUS, gen. nov. 

 Fam. DACTYLOPIIN.D. 



Insects subterranean ; forming a more or less complete sac. Limbs present ; 

 antcnnie close together, as in Ripersia ; 6-jointed, terminal joint large. Body ter- 

 minating in a pair of chitinous anal lobes as in Eriococetts. Derm with trilocular 

 pores. Anal ring setiferous. 



Young larva with a pair of stout chitinous spines. 



Type : G. radicum. 



Geococcus radicum, sp. nov. 



Adult ? forming brittle 

 pulverulent white sacs, attached 

 to roots of grasses. Broadly 

 fusiform, narrowed at both ex- 

 tremities, verypale honey-yellow. 

 Antennae 6-jointed, their bases 

 almost contigu- 

 / ous ; somewhat 

 clavate.terminal 

 , joint largest. 

 Anal lobes den- 

 sely chitinous, 

 dark coloured, 

 short ; a stout, 



tooth-like spine at extremity of each, giving it the appearance of being Inarticulate. 

 Derm with very large, conspicuous, trilocular [tores disposed irregularly. 



Length, 125 to 150 mm. 



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Fig.Z-b. 



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