RICE-PEST OF BRITISH BURMA. i( 



shaped projections on each side of the body ; they are cer- 

 tainly open, and, moreover, the prominences on which 

 they are seated have, in growing, broken through the walls 

 of the pupa-skin so as to gain access to the air-chamber 

 of the cocoon ; their orifices are transversely elongated 

 dark-brown slits encircled first by a light-brown and then 

 by a dark-brown ring. The remaining abdominal stigmata 

 are indiscernible without dissection, and they certainly do 

 not pierce the pupa-skin. 



The pupa of the Burmese species agrees in all essen- 

 tial particulars with that of the European form, differing 

 only in its much smaller size, slenderer form, less promi- 

 nent stigmata (which, moreover, have their mouths di- 

 rected outwards and upwards, instead of straight out- 

 wards), and shorter posterior legs. 



The pupa of the Brazilian Cataclysta pyropalis has 

 only the second and third pairs of abdominal stigmata pro- 

 minent and concerned in pupal respiration, wants the 

 frontal setae, and differs in other structural details from 

 both the above. 



The Cocoon. Figs. 3, 3^, 3/'. 



The cocoon is spindle-shaped, about 12 millims. long 

 and 2 '5 broad in its widest part in front, length to 

 breadth 5:1. It is attached to the middle and sides of 

 a portion of the upper surface of an imperfectly opened 

 leaf-blade, the opposite sides of which are firmly and 

 closely pinched together at either end of it, so that the 

 only one of its sides left exposed to the water is flat and 

 has the outline of an ellipse sharply pointed at both 

 ends, but especially at the aboral end (that towards 

 which the pupa's tail is directed), which is quite acu- 

 minate. It is composed of whitish silk, and, though 

 exceedingly tough and close in texture, is yet sufficiently 

 transparent to permit of the general form and characters 



