464 Mr. E. E. Green's Remarks on 



many examples there is a well-marked rugose thickening of the derm 

 on the median dorsal area. Pygidium rounded. Aiaal aperture 

 surrounded by a circumscribed thickened area. Dorsal surface of 

 pygidium longitudinally rugose ; with eight irregular oblong patches 

 of denser chitin. All these denser areas are rendered more con- 

 spicuous by their taking a deeper stain than the surrounding parts. 

 Circumgenital glands in a scattered arch, containing a variable 

 number of (from 30 to 45) pores : the average of twenty examples 

 giving 39. Margin of pygidium (fig. 2) with six narrow lobes which 

 taper to a blunt point. Marginal processes long and slender, 

 spatulate, extending twice the length of the lobes : 2 between 

 median lobes, 2 between median and first lateral, 3 between 

 first and second laterals, and from 7 to 10 beyond the second lateral 

 lobe. There is a long and slender marginal spine after the first 

 marginal process, in the interspace between the two lateral lobes, 

 and another after the second or third process beyond the outer 

 lateral lobe : other smaller spines at intervals, and an irregular sub- 

 marginal series of about 20 small spines on conspicuous circular 

 bases. Length 0'65 to 0'8 mm. 



Adult male not observed. 



The nymphal pellicle (fig. 3) shows the following peculiarities. 

 The cephalic area is strongly demarked and bears a central scar of 

 definite and constant form, as shown in figure. The rostrum is 

 disposed immediately below the centre of the body. The pygidium 

 has a sharply defined disc separated from the marginal area and 

 bearing about 14 conspicuous dorsal pores. The margin (fig. 4-a) 

 displays 4 lobes, widest at extremity. In each interspace between 

 the lobes is a single large lunate pore from which arises a pair of 

 broad fimbriate squames, and a varying number of similar pores (of 

 which 4 are usually larger and more conspicuous) beyond the lobes 

 on each side. In older examples the marginal characters are 

 partially obscured. 



Habitat, on Pinus halepensis and P. canariensis : Santa 

 Ursula, Teneriffe, Canary Islands. Collected by Dr. Perez, 

 to whom the species is dedicated. 



Leucaspis perezi most nearly resembles L. pusilla of 

 Loew. The pupariiim is of small size, as in that species, 

 but is much darker in colour, the pellicles being blackish 

 instead of fulvous. The pygidial processes of the adult 

 female are of very much the same character in the two 

 species, but — in perezi — are more constant in number and 

 more uniformly spatulate in form. The most noticeable 

 differences occur in the nymphal pellicle, as may be 



