Aclerda. 291 
cephalic extremity. There are no specialised stigmatic spines. Length of 
narrow form, 8 to 10 mm. Breadth averaging 2°50 mm. Broad form 
8 by 4 mm. 
Nymph (fg. 9) similar in form to adult, but posterior extremity more 
rounded (jig. 18), never distorted ; margin with numerous small rounded or 
bluntly fusiform processes. Length 2°50 to 350 mm. Breadth averaging 
1 mm. 
Male puparium (jig. 5) oblong oval, narrow, flattish ; very obscurely divided 
into plates ; glassy, colourless, frosted ; surrounded by an irregular fringe of 
white waxy matter. Length 2°50 mm. Breadth 075 mm. 
Adult male (fg. 1) very pale reddish; ocelli black. Elongate, narrow. 
Antenne and legs long and slender. Ocelli four (two dorsal and two ventral) ; 
eyes minute, rudimentary, lateral. Terminal joint of antenna with three (some- 
times four) long, knobbed hairs, each almost as long as the joint itself. Wings 
long and narrow, slightly tinged with brown; costal nervure very pale pink. 
Halteres apparently wanting. Notal plates of mesothorax small ; scutellum 
unusually large and elongate, considerably longer than the pro- and mesothorax 
together. Genital sheath slender, pointed, almost equal in length to the 
penultimate segment of abdomen. Extremity of abdomen with a short seta, 
and a few small hairs on each side. Length (including genital sheath) 
160mm. Expanse of wings about 3 mm. 
Young larva (fig. 13) oblong oval, narrow ; indented at point of insertion of 
antennee and at the boundaries of the mesothorax. Colour milky white. Legs 
long and slender. Antenne short, six-jointed. Eyes black, marginal, prominent. 
Extremity of abdomen (fg. 14) with a pair of rounded, fleshy lobes, each 
bearing a long seta on a globular base, which appears to be homologous with 
the marginal bulbular spines. Between the lobes is a pair of small pointed 
chitinous plates (suggestive of the lobes of the anal operculum in Lecanzu7), 
and a small median plate with rounded posterior border, which assumes a 
prominent position in the adult insect. Margin (jig. 15) with a series of 
remarkable bulbular spines alternated with slender-pointed spines with dilated 
bases (two of each form on thoracic and one of each on abdominal segments). 
Some of the bulbular spines have the form of a mucronate sphere ; others 
appear to be cup-shaped, with the spine on one lip; others, again, are unarmed. 
Length 0°75 mm. 
The insect appears to be ovoviviparous. No eggs have been observed ; but 
young larvze appear when females are kept alive. 
At the final ecdysis the adult insect at first lies free within the skin of the 
nymph. 
Concealed beneath the ensheathing bases of the leaves of Avumdinaria sp. 
Pundaluoya, Yatiyantota, Udagama. 
QQ 
