CHILO PHRAGMITELLUS. 321 



CHILO PHRAGMITELLUS. 



Plate CLIX, fig. 7. 



On the 12th of February, 1869, 1 received, from the 

 Rev. John Hellins, two larvae of this species, and on 

 the 28th, some more of them from the Hon. T. de 

 Grey [now Lord Walsingham], in stems of Arundo 

 jpliragmites, either hibernating or feeding (perhaps) 

 on the knots inside. Early in April, I found one that 

 had escaped from the stems very actively crawling 

 about. 



The larva is three-quarters of an inch in length, 

 cylindrical, and tapering a very little behind; the 

 segmental divisions are deeply cut; each segment has 

 only one subdividing and deep wrinkle. 



The ground colour of the back is pinkish-grey or 

 pinkish-brown, the sides flesh-colour, and the belly 

 white. The dorsal line, very thin, is dark greyish- 

 brown or pinkish-grey ; the subdorsal stripe is of a 

 similar colour but a little paler; the spiracular line 

 is a little thinner and paler, though on the thoracic 

 segments it is not linear but blotchy ; the subspira- 

 cular line is thinner still, and of the same pinkish- 

 grey colour; the head is brownish-grey or pinkish- 

 grey, with an ochreous tinge, having the large ocelli 

 and the mouth blackish; on the back of the second 

 segment is a pinkish-grey-brown semicircular plate, 

 and another on the anal tip ; the small tubercular dots 

 are dark brown, each having a fine bristle of the same 

 colour ; the spiracles are black. 



Previous to pupation, the larva gnaws an oval hole 

 from within at the side of the reed, and covers it 

 carefully with silk and bits of dry reed, so as almost 

 entirely to conceal it, and which serves as an outlet 

 for the moth. 



The pupa is three-quarters of an inch long, mode- 

 rately slender, and of nearly uniform bulk, tapering 

 only at the two last abdominal segments ; the anal 



vol. ix. 21 



