CHTONASPIS BICLAVIS. 191 



potash, pyriform, narrowed behind and broadly rounded 

 in front. Dermis highly chitinised. Segmentation dis- 

 tinct. Rudimentary antennas (PL XXI, fig. 7) usually 

 with three short spines. Rostral filaments short, reach- 

 ing to centre of thoracic segment. Anterior parastigmatic 

 glands number about seven ; posterior groups from 3 

 7. Pygidium (PL XXIII, fig. 1) without circumgenital 

 glands. Dorsal tubular spinnerets are all narrowly 

 cylindrical (PL XXI, fig. 8), and have the inner capitate 

 extremity proportionately larger than any other species 

 of British Inaspinse; they are numerous along the 

 margin and submarginal area ; there is also a more or 

 less definite band of them extending, divergently, from 

 the base of the median lobes almost to the preceding 

 segment. Median lobes (PL XXVII, fig. 1) large, 

 nearly as broad again as long ; inner margins approxi- 

 mate at the base, but divergent; posterior margin 

 usually rounded ; outer lateral margin, sloping towards 

 the base, is roundly dentate. Second pair of lobes 

 minute and usually bilobate. Third and fourth pairs 

 mere dentate projections of the body- wall ; the former 

 consisting of three to four projections, the latter of two. 

 Beyond the ninth plate are five to six similar dentate 

 projections. Two spines accompany the median 

 lobes, one ventral and one dorsal. Plates spine-like ; 

 median pair minute ; there are two between the median 

 and second lobes ; three to four between the latter and 

 the fourth lobe ; three longer ones, and a slender spine 

 immediately anterior to the fourth lobe; then follows 

 a group of four to five much larger ones. Each of the 

 three preceding segments bears a group of five to seven 

 still larger ones. Two large, somewhat club-shaped, 

 chitinous thickenings of the dermis extend inwards from 

 the base of the median lobes, forming a distinctive 

 character in this species. On each side of these organs 

 are two to three minute spines. 



Mr. Green * describes the colour of the oviparous 



* ' Coccidae of Ceylon,' p. 152. 



