﻿116 THE ENTOMOLOGIST. 



ence of the larvse by some difference in the soil in which 

 they grew. Yet they all flourished within an area of some 

 one hundred square yards. After the selection of the sort 

 of food comes the question of the amount of food to be 

 given. Speaking generally, it is best to give a batch of 

 larv£e an amount of food which they can entirely consume 

 in a certain limited period. However well ventilated the cage, 

 even if it is entirely composed of perforated zinc or muslin, 

 it does not do to cram it full ; the spray of foliage should stand 

 free as it does in nature. It is far better for the larvee to starve 

 for two or three hours occasionally than for their cage to be 

 choked up with food. Indeed, the health of some of the more 

 voracious larvaB, which eat night and day, is sometimes distinctly 

 improved by their being kept without food for a short while. In 

 this, however, like everything else, the special habits of the 

 larvffi affect the treatment. For instance, those who use leaves 

 for habitats require more food in proportion to their number 

 than other kinds. I refer to such genera as Palimps'estis 

 and Asphalia. With some of these each larva requires two 

 leaves for its habitat, so that if twenty larvse were in a cage, 

 sprays bearing sixty leaves would have to be given to enable 

 each larva to have even one leaf for food ; and as soon as twenty 

 leaves had gone, more food would have to be added. Moral : 

 keep very few such lai'vse in the same cage, and on no account 

 wait for the food to be entirely consumed, but add fresh frequently. 

 I am not at all sure that the bad reputation of Tceniocampa 

 populeti for cannibalism is not largely due to keeping so many in 

 the same cage that the larvje have not enough leaves for habitats, 

 let alone food, and consequently consume each other. 



(To be continued.) 



NOTES ON A LIME TEEE APHIS, PACHYPAPPA 

 REAUMURI, Kaltenbach, NEW TO BRITAIN. 



By Fred V. Theobald, M.A. 



(Concluded from p. 76.) 

 Peogeny of the Fundatkix. 



Only one or two of them existed and unfortunately were left 

 and became nymphae. I thus append Del Guercio's description : — 



" Yellowish brown, with four-jointed antennae, rather longer than 

 the whole body. Eyes red. Rostrum and feet well developed. Siphons 

 quite distinct and black. The antennae have the ' nail ' the length of 

 the fourth segment, and as the insect grows a fifth segment appears." 



This stage, only figured by Del Guercio in its first instar, is 

 very marked, and very unlike the larva derived from the alate 

 female. 



