A PRELnilNARY LIST OF 'tHE INSECT-FAUNA OF MIDDLJigEX. 139 



most of which are coloured by a chestnut pigment. I do not wish 

 to insist on this fact, but still it is significant in relation to the 

 present argument. There will also be found in the following and 

 concluding section (on the biological aspect) a discussion of 

 certain reported facts in variation which may throw very con- 

 siderable light on, and, indeed, if correct, must be considered a 

 remarkable confirmation of, these arguments. 



GENEALOGY OF PIGMENT COLOURS. 



SUB-PIGMENT 

 snch as galatea 



( Eaely ) 



Chestnut y 



{ Soluble ) 



Later ) 



[ Brilliant ] 

 i Copper [ 

 ( Soluble ) 



I Brilllant ) 

 •I Orange [ 

 { Soluble J 



Soluble 



1 



Chestnci 



V 



e.g. 

 megara 



Less 

 soluble 



1 



J 



Bbown(?) 1 

 I Insoluble j 



Bed ■] 



e.g. 

 V. atalanta !- 

 Helieonius 

 Anantea J 



Pink 



Sphinges 



(To be continued). 



A PEELIMINAEY LIST OF THE INSECT-FAUNA OF 



MIDDLESEX. 



Compiled by T. D. A. Cockebell. 



(Continued from p. 121.) 



Subf. Apameince. 



Gortyna ochracea, Hb.jWest Hampstead; Kilburn; Willesden; 

 Hammersmith ; on the site of present Earl's Court Station ; on 

 the site of Shirland Eoad ; back of Warrington Crescent, Maida 

 Vale {Godwin) ; Mill Hill, bred from pupae found in burdock-stem 

 {South) ; Bedford Park, 1886 {CklL). 



Hydroecia nictitans, Bork., Bishop's Wood, Hampstead; Ham- 

 mersmith {Godwin) ; Mill Hill, at sugar [So'iitli) ; Hampstead 



