Lecaniince. 221 



LECANIUM LONGULUM, Douglas. 



(Plate LXXX.) 



Lee. longulum, Douglas, Entomologist's Monthly Magazine, October, 

 1887, p. 97. 



Lee. ehiriinolia, Maskell, Trans. New Zealand Institute, Vol. XXII. 1889, 



P- 137- 



The following is Mr. Douglas's description, which answers closely to 

 Ceylonese examples of the insect : — 



' 9 scale dingy pale yellowish-grey, elongate, narrow, ends broadly rounded, side 

 margins slightly curved out, not recurved ; surface smooth, transversely arched, longi- 

 tudinally level semi-cylindric, not carinate, a band of faintly dark reticulation along the 

 sides, whence, in some examples, faint dark lines radiate to the margin ; the disc occu- 

 pied with a long, pale, clear, oval spot ; or in some mature specimens Ihe scale is 

 unicolorous yellow-brown, the dorsal spot partly or wholly covered, and on the sides 

 minute pale dots in place of reticulations. Under side all pale, a broad space all round 

 the insect, a conspicuous blackish eye-spot above each antenna. Antennse of eight joints : 

 the first short ; the second longer, about the same length as the fourth ; the third longest 

 of all ; the fifth longer than the fourth, but not so long as the third ; the sixth, seventh, 

 and eighth shortest, the eighth longest of the three, which (especially the terminal) 

 have all gradated sides. The eighth, indeed, simulates two joints, but the graduated 

 structure and tte want of colour make it impossible to determine with certainty whether 

 or not there is a real articulation. Young larva under the scales. A scale remarkable 

 for its length, narrowness, and semi-cylindric form.' 



To the above description, the following particulars may be added. The 

 darker tint of the sides consists of a nebulous reticulation of closely set dark 

 specks enclosing irregular pale spots, the pale spots forming longitudinal series 

 on abdominal region {fig. 2). The small black eye-spot is submarginal and 

 distinctly visible on the upper as well as the under surface. The eighth 

 antennal joint, in my Ceylonese examples, is sometimes no longer than the 

 sixth. I have noticed the following two formulae : 3, (2, 5), (i, 4, 8), 6, 7 ; and 

 3, 5, (2, 4), I, (6, 8), 7. The excess of the fifth over the fourth joint is notice- 

 ably constant in all examples. The eye-spot, in macerated examples, is 

 enclosed in a well-defined irregular clear space (fig. 6). The derm is thickly 

 sprinkled with small oval and subglobular translucent cells, which are more 

 conspicuous towards the margins. Stigmatic cleft {fi,g. 7) small and incon- 

 spicuous ; stigmatic spines three, the median about three times length of 

 laterals. Marginal hairs simple, pointed, curved {fig. 8). Anal operculum 

 reddish. Scales of anal operculum (fig. 4) broad, with acute angles, the angle 

 formed by the base and outer edge slightly falcate ; outer edge a little longer 

 than base. Submarginal tubercles comparatively large (Ag. 3) and numerous ; 

 ten to twelve on each side. Legs normal, tarsus shorter than tibia. Hairs of 

 anal ring eight, two of them much shorter and more slender than the others. 



