454 Mouophlebince. 



apex. The derm on the ceriferous tracts is usually more translucent than that 

 of the intermediate areas. The denser areas show small translucent dermal 

 cells. Venter with scattered spiniform seta; and a few trilocular pores. The 

 pores surrounding the ceriferous tracts are of two types {?>&& fig. 13), some 

 with quadrilocular orifices, forming the front row immediately adjoining the 

 ceriferous spines, and others with obscurely trilocular orifices, encircled by six 

 oval cells forming the outer ranks. A few pores of the c|uadrilocular type are 

 scattered very sparsely amongst the spines of both ceriferous tracts and inter- 

 mediate areas, the latter having also a few pores of the trilocular type. Pores 

 with simple circular or oval orifices {fig. 14) are crowded on the anal tract, 

 together with numerous long stout sette springing from spcketed bases. 

 Abdominal spiracles in the form of a deep circular ring, number undeter- 

 mined. Anal ring with a single row of irregular shaped cells, the passage 

 from the ring to the external orifice densely chitinous. Length (including 

 processes) 11 to 14 mm.; breadth 6"5 to 7'5 mm.; height approximately 

 6 mm. 



Female nymph similar but smaller. Antennae eight-jointed. 



Newly hatched larva {fig. 9) pale pinkish orange, the dorsum thinly coated 

 with white mealy secretion, and with a marginal series of very long, colour- 

 less, glassy filaments. Antennae (yf^. 10) five-jointed. Length approximately 

 I mm. 



Eggs pale yellow. 



Adult male (7?cr, u) blackish, pruinose, the prothorax sometimes slightly 

 reddish. Wings dark slaty grey, ample ; minutely transversely rugose, except 

 the costal area which is granulose ; with two stout and prominent black 

 nervures and two whitish longitudinal creases. Antennae ten-jointed, the 

 two basal joints short, the remainder elongate and obscurely tri-nodose ; 

 with many longish hairs arranged in rather indefinite whorls on the nodes. 

 Eyes large and prominent, with numerous facets. A rudimentary ocellus 

 immediately behind each eye. Abdomen setose ; the posterior extremity with 

 a pair of stout, fleshy, setose processes. Length 4 mm. Expanse 9 mm. 



Male puparium {fiig. 8) consisting of an oblong mass of flocculent white wax, 

 at the anterior extremity of which can be seen the remains of the larval 

 exuviae. In some examples there are a few straggling white filaments on the 

 sides and at the posterior extremity. Length 10 to 12 mm. ; breadth 5 mm. 



Nymph dull purplish grey. Length 4 mm. 



On the twigs and smaller branches of Dodoncra viscosa, Psidiuni { ' Guava '), 

 and Eugenia rotundifoUa. Chilaw ; Kandy ; Dolosbage ; Mahintale ; Nuera 

 Eliya. Received also from Java, on Citrus; and from South India, on an 

 undetermined plant. The winged males were observed in March and April. 



NIETNERA, Gen. nov. 



Allied to Walkeriana, but differing, primarily, in the antennae of the adult 

 female which are normally eleven-jointed. The derm of the dorsum is closely 

 covered with short, stout spines, which are acute on the ceriferous areas, but 

 bluntly rounded on the intermediate areas. In the adult stage the waxy pro- 



