1919.1 165 



this instar. Unfortuiiatelj- the specimen was mounted witliout the skin 

 being spread, so that there is sometimes doubt whether some hair or 

 lenticle belong to one side or the other. 



On the slide the larva is 1"2 mm. long, and does not ap})ear to l)e 

 decidedly shrunk or stretched. The head is 0'2 mm. across, has four 

 ocelli in a curve, and one not quite central to the curve. The mandibles 

 are, roughly, square, 0"03 mm. across ; they look not unlike the front 

 paws of a mole, the basal half smooth, the distal half divided into four 

 fingers and a thumb, the latter short and small, the four, strong, sharp, 

 '•urved teeth. The antennae have a narrow basal joint and a tolei-ably 

 square (on the slide) second one about 0"007 mm. across, which carries a 

 hair, about 0'028 long, and two very short ones, which appear however to 

 be carried by a very small third joint. The other mouth appendages are 

 not so easily made out, the maxillae are hidden behind the mandibles and 

 appear to end in three nearly level processes. The labial palpi have each 

 a minute joint (on a larger basal one ?) which carries a small hair. On 

 the body is the usual series of long dorsal hairs ; these are for the most 

 part about O'lo mm. long, but the prothoracic pair are longer, about 



03 mm. and those in the last segment ai'e also long, one pair 0'4 mm. in 

 length. These hairs all have a fine sweeping curve backwards (except 

 the forwai'd one on mesothorax, wdiich curves forwards). These (and all 

 other hairs) are very abundantly and finely spiculated, the long dorsal 

 hairs are, however, smooth in their lower (or posterior) aspects. 



On the prothorax are dorsally behind the plate a pair of long hairs, 

 directed i-ather forwai'ds than backwards, each accompanied by a short 

 hair, there is also a long hair above the spiracle, and four not so long 

 between the spiracle and the plate, there is a lenticle above these. On 

 the mesothorax the dorsal hairs are represented on each side by a pair- - 

 a front one curved forwards, and just behind it one curved backwards. 

 On this and. following segments there is a lenticle below the dorsal hairs. 

 On the following segments is one long dorsal hair on each side, usually 

 (I do not see it in some cases) with a small hair behind and external to it. 

 The mesothorax and all segments to the eighth abdominal have the usual 

 three hairs below the spiracle, there is also a fine hair on the base of the 

 prolegs, this does not appear to be spiculated. There is also a short hair 

 in front of the lenticle. On the 5th abdominal segment there appear to 

 be two lenticles, the additional one below the other and also on the 6th. 

 On the 7th and 8th segments, the lenticles are very large ; they are 

 w^anting on the 9th and 10th. On these are a dozen or more hairs, 



4 to 6 mm. long, whose disposition the mounting of the specimen renders 

 more difficult to describe than it always is. Fig. 3, on Plate YI, is a 



