Indian Museum Notes. [Vol. V* 



anterior to genital aperture. Length 1-50 to r8o mm. Breadth about 

 o~50 mm. 



Habitat. — On the upper surface of tea leaves ; Darjeeling. 



Differs from Ch. these and Ch. aspidistrae in its greater size, in 

 the white colour of the puparium, and in having the anal aperture 

 situated anterior to the genital orifice ; from Ch. albizzisehy its greater 

 size and by the relative positions of the anal and genital apertures : 

 and from Ch. mussoeudse by the small median lobes and the pre- 

 sence of both lateral lobes, as also by the colour of the puparium. 



10. Lecanium Watti, n. sp. (plate 2, figs. 1-5). 



These large scales were found on the twigs and stems of a tea 

 plant in Assam. Though the insect is really very flat, the scales 

 take the curve of the stem to which they are attached (fig. 1). These 

 flat forms of Lecanium are usually leaf-infesting species, but 

 Lecanium Watti was observed on the stems of the plant only, though 

 the leaves and the whole plant were covered with the sooty fungus 

 that usually accompanies members of this family. The species ap- 

 pears to be quite distinct, and I have very much pleasure in naming 

 it after the distinguished author of 4 The Pests and Blights of the 

 Tea plant,' who has done such valuable work in bringing together 

 all the scattered information on that subject and has enriched it by 

 his own personal observations. 



Adult? (fig. 2) irregularly oval, with marginal indentations oppo- 

 site the stigmatic orifices and a deep cleft from the posterior extre- 

 mity extending inwards for more than one-fourth the total length of 

 the insect : flattish, or slightly convex : undersurface curved to the 

 shape of the stem upon which it rests. Dorsum coated with a tough 

 colourless coarsely granular secretion which gives the surface a dull 

 lustreless appearance*. Below this secretion the skin is polished but 

 coarsely granulate or mammillate. Colour bright castaneous (beneath 

 the superficial covering) ; marginal area darker. Derm glands very 

 small, approximately circular, scattered rather closely over the entire 

 surface, rather more conspicuous (by reason of their darker surround- 

 ings) upon the marginal area. Eyes situated at some distance within 

 the margin ; large and prominent ; conspicuous in macerated examples 

 but obscured by the secretionary coating in the living insect. Antenna 

 (fig. 3) 7-i ointed > 3^ joint very long, equal to 4th, 5th and 6th toge- 

 ther : the division between 3rd and 4th often incomplete and some- 



• The specimens submitted for identification had been preserved in alcohol 

 which may possibly have altered the nature of the superficial coating of secretion. 



