A PRELIMINARY LIST OF THE INSECT-FAUNA OF MIDDLESEX. 119 



me to point very significantly to one conclusion, that green has 

 been evolved from yelloiv similarly as red has. I am, however, 

 anxious not to insist upon this interpretation at present, since 

 the data to hand ai-e far too scanty for a definite decision to be 

 made; but it is certainly justifiable to point out the probability 

 of this view. For the rest, I can only wait until, by experiment- 

 ing on a large number of green species, further data shall have 

 been accumulated. I may add that, in forming this opinion as to 

 the relations of green and yellow, I have relied not simply upon 

 the fact that in several cases green has been changed into a per- 

 manent yellow, but also, especiallj', on the apparent evidence 

 afforded by various species of j^ellow being a transition stage in 

 the course of the dissolution; just as, for example, the red of 

 Delias and the orange -red of G. cleopatra are first changed to 

 yellow, and then that yellow dissolved. 



This much must serve for green ; and now we pass to the last 

 colour to be considered, vis,, blue. 



(To be continued). 



A PRELIMINARY LIST OF THE INSECT-FAUNA OF 



MIDDLESEX. 



Compiled by T. D. A. Cockebell. 



(Continued from p. 97). 



Additional records have been obtained from the following 

 sources : — 



(23.) Eev. J. E. Tarbat. A MS. list of Lepidoptera taken 

 mostly at Brook Green, Hammersmith, between the years 1881 

 to 1883 inclusive. 



(24.) A. W. Mera. A MS. list of Lepidoptera taken in 

 Middlesex, chiefly between the years 1862 and 1879. 



(25.) Canon Fowler. * Coleoptera of the British Islands.' 

 Records quoted from this work are for the most part credited to 

 its author, as the name of the collector is not often mentioned 

 therein. It would be better, no doubt, to quote the original 

 sources of information from which Canon Fowler got his records, 

 most of which have probably been published before ; but this 

 would involve more bibliographical research than the present 

 recorder has time for. 



Two additions are so interesting that they may be noticed 

 now. Mr. Mera gives me records of LeucopJiasia smapis, L., 

 "in a lane near Acton, one specimen taken by a friend"; 

 and Stauropus fagi, L., one taken in his garden at Hammersmith 

 about 1863. Additional records for several of the rare sj)ecies. 

 have also been received, and will be published later on. 



It has happened not unfrequently that the same locality for 



