194 



INSECTS OF SAMOA. 



the long setae on all parts of the insect are black (in alcohol), and all the short 

 setae are pale. All the verrucae and spiracles are black. There is an indefinite 

 dark subdorsal line, which arises on verruca Beta of the mesothorax, and becomes 



wider on more posterior segments, 



IP' 



so that on the third and subsequent 

 abdominal segments it includes both 

 verrucae Beta and Rho ; on each 

 abdominal segment the subdorsal 

 lines are also connected across the 

 dorsum, posterior to verruca Beta. 



Head. — -The head presents no 

 features of interest. 



Text-fig. 4. — Deilemera alba Pagenstecher. 

 Full-grown larva. (Drawn by Dr. V. B. 

 Wigglesworth.) 



Thorax. — On the prothorax (I, Text-fig. 5) all the setae of the Beta group 

 are on one plate ; a and y form a continuous row, j8 is represented by a short 



B 







P 



® ) 









K.TJ 







P 







7T 





o 



0" 



IT 



/ 



Text-fig. 5. — Deilemera alba. Prothorax (I), Mesothorax (II), and first 

 abdominal segment (i) of full-grown larva, seen from left. Only the 

 bases of the setae are indicated. 



row, which is separated by a definite gap from 8. Rho is a group of four to five 

 small setae on a small brown plate. Mesothorax and metathorax resemble one 

 another, and only differ from prothorax in Beta, which is round, and shows no 

 trace of the separate existence of a and /?. The legs, and the spiracles call for 

 no comment. 



Abdomen. — Throughout the abdomen a and /? are completely united : Rho 

 is always separate from Beta. The homologies of the setae below the spiracles 



