NOTES ON ANOPHELES IN CEYLON. 271 



swarm of minute ants in the cage, which they had entered by cutting 

 a small hole in the muslin and through which Anopheles was on the 

 point of making its way. On a still more sad occasion I found that 

 a misguided rat had eaten, in the night, a hole through the cover, with 

 the result that about a dozen Anopheles which had had a satisfactory 

 meal from my arm in the evening had escaped; as there were some 

 fever cases in the hospital close by, I experienced the feelings of a man 

 who has inadvertently let loose a live torpedo in a crowded harbour. 

 The cage therefore must be protected from every possible assailant. 



Anopheles fuliginosus has the same musical note as the ordinary 

 Culex, at least my unmusical ear can detect no difference. Not 

 only is it an exceedingly nimble, but it is also a fearless creature. 

 I have repeatedly examined them, when feeding, with a lens of §" 

 focus without any symptoms of apprehension on their part. 



Description of full-grown larva (fig. 1) under lens §" focus. — Length 

 5 mm. comprises a head, thorax and nine segments. The head (fig. 

 2) bears the eyes, antenna?, mouth and whorl organs. It is usually 

 pale brown mottled with darker brown, particularly about the mouth 

 parts ; globular slightly produced anteriorly. The eyes, two in number, 

 are placed at the base of the antenna? — black. Antenna? two-thirds 

 the length of the head project forwards and outwards to a level with 

 or beyond the whorl organs, usually pale brown in colour, minutely 

 forked at apex — black. The whorl organs are situated on the anterior 

 portion of the head close to the mouth and consists of two bundles of 

 extremely fine hairs convex outwards ; internal and parallel with them 

 is a single long straight seta on either side passing directly forwards. 



The thorax is larger than the head or abdominal segments, some- 

 what quadrate, broader from side to side than from before backwards, 

 broader posteriorly than anteriorly ; translucent, varying in colour, but 

 usually pale olive green externally, darker olive green in tho central 

 line, with two white or whitish circular markings anteriorly on either 

 side of the dorsal line. It bears several fine seta?, sometimes almost 

 in tufts, more particularly on the anterior border and posterior angle, 

 the latter being much the longer — all projecting forwards ; a few also 

 are on either side of tho central line. 



Segments usually green with darker central line, the penultimate 

 segment greenish red. The first three have from their posterior 

 angle fine bundles of branching setae which branch boldly forwards. 

 The next four are likewise provided, but the seta? are exceedingly 



