148 Dr. T. A. Chapman's Observations on 



secondary hairs being more numerous, but there do not 

 appear to be any secondary hairs on the general skin 

 surface, VI remains a solitary hair, and there is no indica- 

 tion of secondary tubercles either on the thorax, or behind 

 the spiracles on the abdomen, I and II form one compound 

 wart, though the two primary hairs are quite distinct. 

 The prologs have 6 and 7 crotchets. 



Description of Lakva of T. iMludum from summer 

 EROOD. — July 7th. 



First Instar. — Rather over 1 mm. long, wliitey-green, almost 

 transparent. Head black, thoracic plate dark, as well as scutes of 

 tubercles and anal plate. Each tubercle has a distinct plate, larger 

 than the mere hair base. I and II are on a common base, as are 

 also IV and V, the hairs are black. The thoracic plate has three 

 hairs of same length in front, central of back series very long, other 

 two short. Single hair in front of spiracle. On second and third 

 thoracic segment are the usual four pairs of tubercles on each side, 

 each pair on a single plate and third pair apparently possesses a 

 third hair on the same plate. The head has a ver}' long hair on the 

 centre of each side of the front of the cranium. The long hairs on 

 head and 1st and 2nd thoracic segments about 0"13 ; hairs II, III, 

 and IV on abdominal segments about 0*1. Points of hairs white and 

 apparently clubbed, towards moult shows some reddish tinting 

 between the tubercles. 



Second Instar — 2 mm. long ; hairs white, arising from black points, 

 more clubbed and proportionately shorter tlian in first skin. No 

 secondary hairs. The tubercles are on distinct largish plates of a 

 faint cinereous tint, and roiind them is a whitish shade as of a 

 porcellanous-white thickening of the skin. The rest is a pale 

 brownish-red, forming a dorsal band, a line along the posterior 

 border of each segment giving a branch forwards (and obliquely 

 upwards) between II and III and between III and spiracle. There 

 is however some variation in tint and extent of red marking, either 

 in different specimens or according to different degrees of maturity. 

 The central hair on head is still long. The first and third posterior 

 hairs of thoracic plate are very short compared with the long second 

 one, the outer one of front row is also long. The prothoracic plate is 

 paler, with dark marbling on each side of central suture, and the 

 dark spot between 2nd and 3rd hairs is distinct, rather nearer 

 posterior margin of plate. The perspiracular tubercle has three 



