Monophlebincs. 455 



cesses are mostly slender and widely spaced. The processes may be gradually 

 shed during subsequent growth, the oldest examples retaining a few of the 

 marginal processes only. Before oviposition the insects envelop themselves in 

 loose, white, woolly secretion. Pores saucer-shaped. Venter without in- 

 vagination. 



Early nymphal stages more closely covered with relatively stouter waxy 

 processes. 



Larv;is with five-jointed antennas. 



Male unknown. 



Type pididaliioya. 



The new genus is named in honour of J. Nietner, a naturalist whose name 

 was closely associated with entomology, in Ceylon, during the middle of the 

 last century. 



NIETNERA PUNDALUOYA, .t/. ^^77/. 

 (Plate CXCI.) 



Adult female {fi_s,s. 6, 7, 8), in life," of a dull purplish grey colour, thinly 

 dusted with greyish white granular secretion. A marginal series of flattened, 

 ochreous-yellow, waxy processes. Immediately above the marginal series, on 

 each side of the thorax, are three longer horn-shaped processes, projecting 

 laterally. Shortly within the anterior margin are two strap-shaped processes, 

 projecting upwards and forwards ; and on each side of the abdomen is a series 

 of six sickle-shaped, forwardly- curved waxy processes. A pair of white curling 

 filaments projects from the anal area. The foregoing description has been 

 drawn up from two examples in which many of the processes had been broken 

 off. Figure 6 must be regarded as partly diagrammatic, the processes having 

 been restored from a comparison of the two specimens. Other examples were 

 found in which the processes had almost completely disappeared (see fig. 8)» 

 and others, again, in which there remained no trace of any processes at all. 

 These naked examples, when kept in confinement, concealed themselves 

 beneath voluminous masses of flocculent white secretion. It is probable that 

 the compact waxy processes are gradually shed during the final stage of the 

 life of the insect. The adult insect is of a short oblong form (see figs. 6 and 7), 

 narrower in front, rather broadly rounded behind, the segments clearly indicated, 

 the margin irregularly crenate, the posterior extremity with a shallow cleft ; 

 dorsum strongly convex and tumescent. After death, the body contracts and 

 assumes the characteristic form shown at fig. 8. 



The antennas are normally eleven-jointed ; but in one example these organs 

 are asymmetrical, one of them {fig. 10) having twelve joints, and the other 

 {fig. 11) eleven joints only. The first three joints are larger and stouter than 

 the others, and approximately equal in length, the third being slightly shorter 

 than the other two ; the terminal joint is elongate, and approximately equal to 

 the third. All the joints bear stout seta; which are disposed — principally — near 

 the distal extremity of each segment. Legs (see fig. 17) large and stout ; the 

 femur with numerous small bristles ; the tarsus with two rows of bristles on the 



