Lecaniincp. 235 



LECANIUM (PARALECANIUM) EXPANSUM, Gree}t. 



(Plate LXXXVI.) 



Lee. expansjim. Green, ' Catalogue of Coccida?,' hid. Mits. Notes, Vol. IV. 



No. I (i8g6). 



Adult 5 {figs- I, 2) very broadly oval, narrower anteriorly, flat, or very 

 slightly convex above ; margin indented at anal and stigmatic clefts. Below 

 with a shallow cavity on each side of abdomen. Colour of living insect reddish 

 Or brownish yellow ; a narrow dark brown marginal zone with well-defined inner 

 border ; a submarginal pellucid zone, merging into a yellowish area ; an irregular 

 median pellucid patch, through which the movements of the internal organs can 

 be distinguished. The dorsal surface is coated with a dehcate transparent 

 waxy layer which is thickened in definite polygonal plates arranged in curved 

 longitudinal series ; each waxy plate with concentric markings, as of super- 

 imposed smaller plates {fig. 8), probably indicating periods of growth. During 

 treatment with potash the whole waxy layer becomes opaque and brittle, and 

 can be removed in flakes. The whole dorsal surface, but more particularly the 

 submarginal zone, with scattered circular translucent pores, sometimes narrowly 

 bordered with a darker areola. On each side of anal aperture, on dorsal 

 surface, is a curved pellucid patch enclosing groups of smaller pores {figs. 3, 5), 

 and a similar patch on each side nearer the centre of dorsum. On the sub- 

 marginal area are more or less distinct small oval epidermal cells radiating 

 towards the margin, and median area closely studded with very indistinct oval 

 or polygonal cells. Scales of anal operculum pointed {fig. 4); base shorter 

 than outer edge. Stigmatic cleft {fig. 7) with from three to nine stout blunt 

 spines. Margin {fig. 9) with complete series of overlapping flabelliform flattened 

 hairs ; the margin itself minutely and irregularly indented, with three main 

 indentations between each point of attachment of the flabellse. Eyes black ; at 

 a considerable distance from the margin. Antenna {fig. 10) with incomplete 

 divisions, though a terminal and two basal joints can usually be distinguished. 

 Legs wanting. Genital orifice surrounded by some eight groups of minute 

 multilocular spinnerets {figs. 3, 6). Length 5 to 7 mm. Breadth 4"5o to 6"50 mm. 



Immature female thin and colourless. Marginal hairs slightly dilated at 

 extremity (yfg. 11). 



Adult i {fig. 15) bright castaneous ; apodema black. Costal nervure of wing 

 pink. Terminal joint of antenna with three knobbed hairs {fig. 20). No caudal 

 setae. Length (including genital sheath) I'so mm. 



Male puparium {fig. 14) oval, glassy, transparent ; median area convex ; 

 divided into eighteen plates, of which three are central and fifteen marginal. 

 Length 2 mm. 



Male larva with a marginal series of stout curved hairs {figs. 12, 13), their 

 extremities dilated and fringed on one side. 



I I 



