378 ' Dactyiopiince. 



setae, each rather more than three-quarters the length of the caudal setse. 

 Derm evenly distributed with numerous minute pores ; a transverse series of 

 larger ring-shaped pores on the venter, across the genital region. Length r5 

 to 2"25 mm. 



Male puparium unusually elongate ; white. Length 2-5 to 4-0 mm. Breadth 

 i"o mm. 



On under surface of leaves of Citrus aurantii. Royal Botanic Gardens. 

 October 19 10. 



A smaller and more delicate insect than P. citrz, with a more definite and 

 conspicuous fringe of waxy processes. Superficially resembling Phenacoccus 

 mangiferce^ but differing completely in structural characters. 



PSEUDOCOCCUS MONTICOLA, nov. 

 (Plate CLV.) 



Adult female {fig. 2) elongate, narrowed in front. Body closely covered 

 with white granular secretion, with a marginal fringe of stout waxy appendages 

 which are moderately long at the anterior extremity, very short on the thorax, 

 and thence gradually increasing in size to the posterior extremity. There is 

 also an ill-defined median ridge of secretionary matter. In many examples the 

 marginal fringe is imperfect, persisting on the posterior segments only. Colour 

 of denuded insect pale olivaceous green. After treatment with potash a some- 

 what irregular sublateral series of glandular pits is noticeable (see fig. 3). 

 These pits have a broadly thickened rim and a translucent area containing 

 two or more superimposed layers of large polygonal cells {fig. 4). Antenna 

 {fig- 7) eight-jointed ; antennal formula : 8, (i, 2), (3, 7), (4, 5, 6). Limbs 

 moderately stout, conspicuously hairy ; tarsus less than half the length of the 

 tibia ; ungual digitules moderately dilated towards the extremity, tarsal digitules 

 slender. Spiracles {figs. 9, 10) rather large. Apex of mentum {fig. 5) with a 

 group of stout curved setae, of which one on each side is considerably longer 

 than the others and has a lateral direction. Including those on the anal lobes, 

 and a supplementary pair on the frons, there are eighteen ceriferous tracts on 

 each side of the body. Spines stout and sharply pointed ; 2-3 on first and 

 second tracts, 5-7 on the third, 2 on each of fourth to sixteenth, 3-5 on the 

 seventeenth, and 4-6 on the eighteenth (anal) tract. Other (rather smaller) 

 spines are scattered sparsely over the dorsum and collected into groups of two 

 to three on the median area of each abdominal segment. Anal lobes (see fig. 8) 

 prominent and rounded, each with a longish stout seta. Anal ring with six 

 stout setae which are only slightly shorter than those on the anal lobes. 

 Anterior and posterior dorsal foveis small and inconspicuous. Length 3 to 

 3-5 mm. 



On foliage of a dwarf bamboo, locally known as ' Elephant Grass,' on 

 patnas above Maskeliya, and at Patipola, at an elevation of about 6000 feet. 



The insects occur singly, near the tips of the leaves, on the upper surface, 

 resting with the head directed towards the apex of the leaf {see fig. i). No 

 ovisacs were observed. 



