NEMATUS LACTEUS. 117 



shorter tlian the fourth ; apical half of hinder tibiee and tarsi blackish ; 

 stigma griseous white, costa darker. 

 Length 3^4 lines. 



Of similar form and size to N. curtispina, but differing 

 from it in having the incision in clypeus deeper, spurs 

 longer, antenna? shorter, stouter, and blacker, and in 

 the entirely black back of thorax. 



The larva has been found on Salix vitellina by 

 Mr. J. B. Fletcher, to whom I am indebted for the 

 opportunity of describing it. The head is black, with 

 the mouth paler, the body dull green, orange over the 

 legs and on the second and two last segments. Legs 

 green, claws and a spot on tibiae black ; claspers white 

 with a tinge of orange. At the base of first pair of 

 legs is a black spot, a large almost square one over 

 the two following ; above these is a smaller spot, and 

 a larger one is over the basal spot on front legs. In 

 a line with these, on the fourth segment, is a roundish 

 dot ; above each clasper are two dots (in a line with 

 above-mentioned one on fourth segment), one roundish, 

 the other double its length, broader behind than 

 before. Over the penultimate segment the dots are 

 smaller, and almost equal in size, but the upper larger 

 than lower. In front of basal mark on front legs is a 

 longish oblique mark. Above this lower row of black 

 marks is another row as follows : between the first 

 and second pair of legs a triangular black mark, 

 following this is a longer narrower mark, then a large 

 triangular mark in front of third pair of legs ; then 

 come a longer and narrower and a shorter one ; 

 slightly higher are two rounded marks, the first the 

 smaller ; then in front of each clasper (commencing 

 with the second pair) we have a large oblique mark 

 followed by two rounded ones in a line to the pen- 

 ultimate, which has only one dot in front of oblique 

 one. Over this line again is a row of broader, 

 shorter, almost continuous marks to the penultimate, 

 and a row of smaller dots goes down the centre of the 

 back. Of the second lateral line there is only one 



