Lecamince. 245 



LECANIUM (PARALECANIUM) ZONATUM, sp. nov. 

 (Plate XCII.) 



Adult ? flat, with a narrow abruptly sloping margin and an inconspicuous 

 narrow median longitudinal ridge, on each side of which is a series of polygonal 

 scars, followed by lines radiating towards the margin. Median area dark 

 purple-brown, followed consecutively by a reddish, a whitish, and a narrow 

 transparent greenish zone and a dark purple-brown marginal area {fig. 2). 

 After treatment with potash the median area remains reddish brown, the 

 marginal zone dark brown, and the intermediate area becomes colourless and 

 transparent. Eyes small but distinct, at some distance from margin. Antennae 

 {Jig. 5) very small ; six-jointed, third and sixth equal and longest, second 

 shortest ; formula : (3, 6), i (4, 5), 2. Legs small and inconspicuous, but well 

 formed ; tarsus slightly longer than tibia. I have been unable to make out any 

 digitules. Scales of anal operculum {fig. 4) elongate, sharply pointed ; inner 

 edge longest, nearly two and a half times length of base. Stigmatic spines 

 {fig. 3) three, bluntly pointed, set in an oval depression within the dorsal 

 margin ; median spine shorter than the other two. Dermal cells obscure and 

 confined to the dark marginal zone, where some indistinct paler oval cells can 

 be distinguished. A few minute translucent pores are scattered over the 

 ventral surface. Margin crenulate, closely set with approximately circular 

 flabelliform hairs {fig. 6). Length 3 mm. Breadth 2'5o mm. 



Adult t5 not observed. 



Male puparium {fig. 7) of usual form ; glassy, transparent, colourless ; 

 divided into nineteen plates, of which four are central and fifteen marginal. It 

 is noticeable that all the fringed species of Lecanium have this large number 

 of plates in the male puparium, the usual number being nine only. Length 

 2 mm. 



Habitat on under surface of leaves of Garcinia spicaia (an indigenous tree). 

 Peradeniya (February). 



Alied to Lee. marginatum, but much larger. 



EXPLANATION OF PLATE XCII. 



Lecanium zonatum. 



Fig. I. Adult females on leaf of Garcinia, nat. size. 



2. Adult female, dorsal view, x 14. 



3. Stigmatic spines of female, x 410. 



4. Anal operculum of female, x 100. 



5. Antenna of female, x 150. 



6. Marginal scales of female, x 600. 



7. Male puparium, x 19. 



