BY L. sarhison. 629 



close together, and are proportionately long, the siibmedian being 

 very long. The styli are fairly long, and incurved. The anal plate 

 (Fig. 8) differs from tliat of the adult in that the clavate hairs, 

 which terminate its inner processes, have inner rudimentary 

 branches. The first and third legs are five-jointed, the second hav- 

 ing a metatarsus marked off. The hairs and claws are as in the 

 adult, except those of coxa and trochanter, which, with the two 

 pairs on the leg-rudiments, are all biramous, with subequal cylin- 

 drical branches, slightly swollen distally, the inner distinctly arti- 

 culating with the outer (Fig. 6). These hairs are all proportion- 

 ately longer than in the adult. There are two pairs of hairs on 

 the sternum of the anal segment. Six segments are completely 

 differentiated ventrally. The whole cuticle is minutely pilose. The 

 wall of the midgut is, even at this stage, already full of lime-cry- 

 stals. In the hexapod condition, the larva grows in length from 

 0'33 mm. at hatching, to upwards of 0-5 mm. 



The ten-legged larva ranges in length from a little over 0-5 up 

 to 0-7 mm. It has four dorsal shields, the fourth being interpolated 

 between the second and third of the previous stage, and bearing 

 an additional pair of tactile set® at the middle of its length, pro- 

 jecting laterally. This shield covers the two added pairs of legs. 

 The antenna has three basal segments. Eight segments are well 

 marked ventrally. 



The twelve-legged larva ranges in length from upwards of 0-7 to 

 over 0-9 mm. The antenna has three basal segments. The anterior 

 flagellum is less than one-half the length of the posterior, which is 

 about four-fifths as long as the flagellum of the upper ramus. 

 There are five dorsal shields, the first four with the usual two rows 

 of clavate hairs, the fifth with both rows very far back. There are 

 four pairs of tactile setse; the first, second, and fourth as in the 

 last stage, the third projecting backwards from a little behind 

 the middle of the fourth shield. The biramous hairs of the limb- 

 rudiments and basal joints of the legs have assumed the adult cla- 

 vate form, but all still have two subequal branches. Ventrally, the 

 segmentation is normal as far back as the third shield (fifth legs) ; 

 behind whicli, there is no suture until that of the anal segment is 



