//^ 





''o» la 



JOURNAL OF VARIATION. 



Vol. XII. No. 7. July 1st, 1900. 



Phorodesma smaragdaria, Fabricius {in't/i Plate). 



By Eev. C. R. N. BUEEOWS. 

 (Condiide'J from p. 154.) 



The larva in hyl)ernatmg stage or one moult later (pi. vii., figs. 4-5). 

 The spiracles are clear and distinct in the unclothed larva ; of large size, 

 dark mahogany-bro-wn -^ith raised chitinous walls ; that on the pro- 

 thorax is rather larger than those on the remaining segments ; in 

 position the spiracle on the prothorax is about midway between dorsal 

 and ventral margins and close to the ]DOsterior margin of the segment. 

 On the 1st abdominal segment the spiracles are situated mid^vay up and 

 towards the anterior margin, the special tubercle (figs. 4o, 5a) not quite 

 so far above the spiracle as iii (supraspiracular), and slightly posterior 

 to the latter. On the 2nd abdominal segment the spiracle "is well up) 

 toAvards the dorsal area, and still shghtly towards the anterior margin ; 

 tubercle iii is only a short distance above and to the front of spiracle ; 

 the special tubercle is slightly higher up than tubercle iii and rather 

 more posterior than iii is anterior to the spiracle. On the 3rd 

 abdominal segment the spiracle is slightly higher up than on the 2nd ; 

 iii (supraspiracular tubercle) is still anterior to, and only very slightly 

 above, the spiracle ; the special tubercle is slightly higher ' above iii 

 than it was on the 2nd abdominal segment, and is nearly midway 

 between the spiracle and the posterior margin of the segment. On 

 ihe 4th abdominal segment the positions are almost the same as on 

 the Brd, but the spiracle is just a trifle lower and iii a trifle higher 

 above it, than on the 3rd abdominal segment, the special tubercle is 

 slightly more posterior. On the 5th abdominal segment there is a 

 very marked change — the spiracle has dropped until it is onl}^ slightly- 

 nearer the dorsal than ventral margin, tubercle iii is almost vertically 

 above the spiracle, whilst the special ttibercle is well below the spiracle 

 almost in the same plane with v (one of the subspiraeular tubercles) 

 Avhioh is- nearly in vertical line beneath the spiracle, and well posterior 

 to the spiracle, and almost directly above iv. On the 6th abdominal 

 segment the spiracle is almost exactly central, the dorsal tubercle ii 

 is well outside and only slightly behind i, tubercle iii is directly 

 above the spiracle and nearly in perpendicular line beneath ii, iv 

 has moved up directly posterior to spiracle, v is well below and 

 slightly posterior to spiracle ; there is no special tubercle on this 

 segment. On the 7th abdominal segment the positions are not greatly 



