36 Journal of the Asiatic Society of Bengal. [N.S., XUX, 
turns chrome yellow in the course of two or three days with 
three red spots, two near the anterior and one near the poste- 
rior end. On the fourth day the young one hatches out, and 
immediately begins to move about. It differs from the adult 
in being smaller in size and wingless. The nymph after five 
successive moults becomes the adult. 
he body of the newly hatched nymph (20b) is yellow in 
colour, about 1-5 mm. long and more than °5 mm. broad, with 
transparent legs, antennae and rostrum. It is so delicate at 
this time that disturbance with a brush may kill it. After some 
12 hours, when the body has turned red and the legs, etc. have 
become opaque, it can be safely transferred for further study to 
a second jar. The antennae are four jointed, the proximal] 
extending to the =e of the abdomen, the tarsi are two 
jointed. 
After the first) moult, which takes place usually 4 days 
after hatching, the lateral margins of the nymph (Fig. 20c) 
become somewhat turned up, the terminal antennal joint be- 
comes swollen, whilst the proboscis, which at first stretches be- 
yond the apex of the abdomen, becomes covered over by the 
growing abdomen. 
The second moult (Fig. 20d) occurs some 10 days after the 
first when wing pads appear on the mesothorax and three trans- 
versely elliptical dark patches on the dorsal surface of the 
abdomen which are the openings of the stink glands (Sharp). 
On the third moult (6 days after the second) the nymph at- 
tains to a length of 5 mm., the wing pads being °75 mm. long 
(Fig. 20e). The female nymph i is larger than the mae White 
patches appear on the ventral surface of the abdom 
On the fourth moult (7 days after the third) the gelvidual 
attains to a length of 9-10 mm., and a white collar appears be- 
hind the hea 
The final moult takes place 15-17 days after the snag and 
the adult appears with two pairs of fully developed wi The 
rate at which develo asia takes place depends EA on n food, 
temperature and moistu 
above penne of the life-history is based on obser- 
vations taken during the months from June to August (1919) 
at Pusa (Bihar). 
LITERATURE REFERRED TO IN THE TEXT. 
(1) Awati (P. R.), Mechanism of suction in the potato capsid 
bug, Lygus pabulinus. Proc. Zool. Soc., London, 1914. 
(2) Cragg (fF. W.), The alimentary canal in Cimex. Indian 
Journal Med. Res., Calcutta, 1914. 
(3) Crampton (G. 0.), Comparative study of the thoracic scle- 
rites of insects. Academy of Natural Science, Vol. LX1, 
1909. 
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