234 ENTOMOLOGY. 



137. E. abbreviate/. — Larva on oak, June and July, (p.) 



138. E. exiguata. — Not common. 



139. E. sonibrinata. — Larva common on juniper in the garden in May. 

 Perfect insect at light, August. 



140. E. rectangulata. — Perfect insect in the garden. 



141. T. simulata. — Larva on Scotch fir, (p.) 



142. T.firmata. — Larva on Scotch fir, (p.) 



143. Y. impluviata. — Larva on alder. 



144. M. rubiginata. — Common, larva on alder. 



145. M. ocellata. — Common, larva on Galium verum, (p.) 



146. M. albicellata. — Scarce, perfect insect. 



147. A. badiata. — Common, larva on petals of rose. 



148. A. derivata. — Common, larva on petals of rose. 



149. S. dubitata. — Common on flowers of heath in the garden. 



150. C. miata. — Not common. 



151. C. corylata. — Common. 



152. C. suffumata. — Not uncommon. 



153. C. prunata. — Not uncommon. 



154. C. testata. — On heath, (p.) 



155. C. populata. — On heath, (p.) 



156. C.fulvata. — Swarms everywhere. 



157. C. dotata. — Occasionally in the kitchen garden. 



158. P. comitata. — Scarce, at light. 



159. E. cervinaria. — Larva on hollyhock in the garden. 



160. E. mensuraria. — Not uncommon, (p.) 



161. A. plagiaria. — Not common, (p.) 



162. T. charophyllaria. — Not uncommon in low meadows, (p.) 



All these insects not marked (p,) occur in the garden and close to the 

 house. I do not for one moment pretend that this is by any means a perfect 

 list, as since I began regularly to collect, my visits to Derbyshire have, from 

 necessary duties, been, comparatively speaking, few and far between, and I 

 have by no means worked the locality thoroughly. All the common Pyrales 

 are abundant, and H. stratiotalis frequent at light; by this means I have also 

 taken P. glaucinalis and Dr. Hagan's new insect Acentropus niveus. 



Stowmarket, August 10th., 1858. 



On tlte variation of species. — A discussion has been going on in the Ento- 

 mological Society, about the possibility of different kinds of food and other 

 circumstances, so altering the appearance of the larvse of lepidoptera, as to 

 give them the character of permanent species. Mr. Westwood has taken the 

 affirmative of this view with regard to the larvse of the small leaf-miners, 

 figured in Stainton's last volume of the "Natural History of the Tineina." 

 I confess to having formed the same opinion as Mr. Westwood, when I saw 

 those figures, and I do not think his remarks have been properly met. His 

 statement, as far as I could gather it, was that he considered that the assumed 



