392 pitocr.F.DiNGS of the third entomological meeting 

 Chilo SID. (C. S. 1831). 

 Plate 61 ; Plate 62, fig. 1. 



Foodplant — Rarhi and Batri {SaccJianim spontaneum). 



The caterpillars were found in small numbers from July to September 

 boring in the stems of grown-up plants. 



The fullgrown larva is about 18 to 20 mm. long, with a glossy yellow- 

 brown head, a shiny yellow shield on the prothorax and a pair of broad 

 brick-reddish stripes on each side of a pale-yellow body. The dis- 

 tinguishing characters are given in the key of the larval forms of borers. 

 The larva pupates inside the stem. The pupa is brown. 



Chilo sp. (C. S. 1835). 



Plate 62, fig. 2 ; Plate 63. 

 Foodplant — 



Ikri (Saccharum fuscmn). 



The larvee fed on juar (Andropogon) stem in the Insectary. 



The caterpillars were found in small numbers and boring near the 

 top of the stems and causing " dead heart." A young caterpillar 

 collected on 12th March died on 10th May without pupating. Cater- 

 pillars collected on 5th July pupated and emerged before the 3rd Sejjtem- 

 ber, the pupal stage occupying 12 days. 



The larva attains a length of about 21 mm. and is rather thick in 

 appearance, measuring about 3-25 mm. across the mesothorax fi-om 

 which the body tapers slightly both ways. The head is brown-yellow 

 and glossy. The prothorax is pale-yellow and rather glossy. The 

 other two thoracic and the abdominal segments have on the dorsal side 

 above the spiracles a purplish tinge on the pale-yellow skin, the purjDlish 

 marking being deeper in the dorsolateral region and almost disappearmg 

 on the dorsal region. The dorsal vessel is visible hke a faint and some- 

 what Laterrupted stripe. 



The larva pupates inside the aft'ected stem. The pupa is about 

 15 mm. long and yellow-brown in colour. The head has a thick short 

 protuberant ridge on the front. The primary tubercles on the body of 

 the larva develop into strong prominent spines on the body of the pupa. 

 The spines are pointed, have a broad base and a hair arising from the 

 side below the tip. 



