LECANIUM PERFORATE M. 121 



LECAXIUM PEKFOEATUM (Newstead). 

 (PL LV, figs. 1-11.) 



Lecanium perforatum, Newstead ; Ent. Mo. Mag., 

 s.s., vol. V, p. 238, figs. 1-3 (1894). 



Adult female (figs. 1, 2, 3) viviparous ; dark 

 piceous, with a more or less obscure blotch of blackish- 

 crimson above the anal cleft ; extremely flat, short 

 ovate, and narrowed in front, or broadly pyriform ; 

 surface shining, more especially so over the respira- 

 tory channels ; tesselation of dermis faintly indicated 

 on the dor sum by very faint carinse, which are much 

 interrupted and disconnected. By transmitted light 

 the dermis (above) appears as shown in fig. 3, and is 

 composed of a number of large, irregular, angular, and 

 deeply-divided plates, forming a remarkable polygonal 

 tesselation ; the two dorsal series are large, and are 

 divided by a clearly- defined straight line, extending 

 from the anal lobes to the centre of the cephalic area, 

 which is there connected with the central pair of 

 anterior marginal plates; subdorsal series irregular, 

 somewhat interrupted ; submarginal series similar, but 

 more interrupted; four or five of the series on the 

 abdominal segments have large, clear spaces, resem- 

 bling perforations, with jagged edges (fig. 5) ; mar- 

 ginal series very long, tapering inwards, bearing 

 numerous clear spaces or gland-like pits (fig. 4) ; all 

 the plates bear a few minute, clear, circular perfora- 

 tions, placed at irregular intervals close to the margin ; 

 and many of those on the dorsum also bear curious 

 ornamentations resembling dendritic markings found 

 in certain geological deposits. Antennae (figs. (5, 6 a, 

 7) slender, of eight joints, of which the second, third, 

 fourth, and eighth are much the longest, the three 

 terminal joints being finely ringed or crenulated : all 

 the hairs are extremely slender ; the last joint (fig. 7) 

 bears one at the apex and five at the margins ; 



