( Ixvii ) 

 The retention of spaces for the " tails " in the pup\e 



OF THE TAILLESS FEMALES OF PaPILIO DARDANUS.— Prof. 



PouLTON read tlie following observations by Mr. W. A. Lamborn 

 on the larvae and pupae of the family described in the last 

 section. The notes had been extracted from a letter dated 

 Dec. 9, 1913. 



" They have given me the utmost pleasure, and I have been 

 constantly mspecting pupae every night for the first indications 

 as to what they were going to be. This has shown me that the 

 pupal wmg-cases are the same in shape in both sexes, but where- 

 as, m the male, the tails can readily be seen on either side of 

 the mid Ime on the night before emergence, in the female 

 the space for their reception, though present in an equal 

 degree, is unoccupied by wing-tissue, a little point which seems 

 to me to support the contention that more ancestral forms of 

 the female were tailed. I think you will see what I mean bv 

 an exammation of the pupa-cases, but by and by I must put 

 some pupae m spirit. You see I have not forgotten the text 

 ot your Lmnean papers,* on these points." 

 _ Considering the position of the " tails " upon the hind-wing 

 It seemed, at first sight, strange that these structures should 

 he near to the middle ventral line. There were fortunately 

 present, m Mr. Swynnerton's FamUy E (p. ki), two male pupae 

 contammg fuUy formed imagines which had failed to emerge 

 These were examined by Dr. Eltrbgham and Prof. Poulton 

 who found that the apical angle of the unexpanded hind-wing 

 was much flattened down, so that the costal margin together 

 with the hmd margin, as far as a broad short projection repre- 

 sentmg the ' taU," formed a continuous and only slightly 

 cui-ved Ime lying along that margm of the pupal hind-wing 

 which was nearly parallel with the mid ventral Ime The 

 posterior end of this margin extended beyond the fore-wmg so 

 that the unexpanded " tail " could be seen within it 

 The Mendelian relationships of the female forms of 



terestingdiscovei4isaniuS;t;ftlnn^" ,^^°^bo™'« important and in- 

 but never pubuKd bTtheTteX? ^ TZ^*'^ ".^-^Sinated 



him to Prof. Poulton in 1SS4 f.^th 7 ^^«^^%' communicated by 



the second oi' Sfbo^ quottd'^r^^r^^"^^" °"* ^"' "'^^^ i^"^"^ - 



