2o6 Lecamince. 



LECANIUM SUBTESSELLATUM, sp. nov. 

 (Plate LXXI.) 



Adult 9 {fig- i) dark castaneous ; broadly oval, narrowed in front, flat 

 Derm with paler reticulating lines forming a tessellated pattern as in tessellatuiii ; 

 the reticulation (in examples under observation) obsolescent on median area. 

 Eyes submarginal. Derm cells {fig. 2) numerous, small, irregularly oval ; 

 conspicuous only on the marginal series of plates, where the chitin is more 

 dense ; the plates outlined by minute translucent pores as in tessellatum van 

 perforatum. A series of larger translucent spots (five on each side) above the 

 abdominal region, situate on the submarginal series of plates, each spot showing 

 a coarsely cellular structure (fig. 3). A few nucleated translucent spots 

 scattered irregularly over the dorsum. Stigmatic cleft small, with three pointed 

 spines (fig. 4). Marginal hairs small, finely pointed, simple. Submarginal 

 tubercles, three to four on each side. Scales of anal operculum {fig. 5), 

 together forming a rhombus ; base equal to outer edge, lateral angle obtuse, 

 apical angle acute. Antenna {fig. 5) with six joints, of which the third is nearly 

 as long as the terminal three together ; formula: 3, 6, i, 2 (4, 5). Legs rather 

 small ; tarsus a little shorter than tibia. Length 2'5o to 3 mm. Breadth 175 

 to 2 mm. 



Habitat on leaves of undetermined tree. Kandy. 



This species closely approaches tessellatum var. perforatum in general 

 appearance and structure, but can be distinguished by the six-jointed antennas. 

 Other differences are the less distinct tessellation, the narrower and more 

 angular anal operculurn, and the smaller marginal hairs. 



EXPLANATION OF PLATE LXXI. 

 LECANIUM SUBTESSELLATUM. 



Fig. I. Adult 9, dorsal view, showing pattern of tessellation, x 15. 



2. Part of margin (surrounding eye), showing derm cells, x 150. 



3. Cellular spot, x 650. 



4. Stigmatic spines and marginal hairs, x 650. 



5. Anal operculum, x 150. 



6. Antenna, x 150. 



7. Foot, x 150. 



