229 



ABNORMALITY IN SPIDERS. 



wm. falconer, 



Slaithwaite, Huddersfielil. 



{Continued from page 203). 

 Since the first part of this paper appeared in print, Dr. 

 Jackson has kindly drawn my attention to the record of a 

 gynandrous spider which I had overlooked, and has also lent 

 me another example which has not hitherto been noted or 

 described, the number of the pseudo-hermaphrodites being 

 thereby increased to six. In the one, a Leptyphantes pallidus 

 Camb., from Cudham in Dorset, which is described by him in a 

 paper entitled ' On some Rare Arachnids obtained in 1908,' 

 p. 20 (' Trans, of the Nat. Hist. Soc. of Northumberland, 

 Durham and Newcastle-upon-Tyne,' New Series, Vol. IIL, 



Maso sundeuallii Westr. 



Fig. I. Abnormal specimen. Epigyne of female. 

 ,, 2. Normal specimen. Epigyne of female. 

 ,, 3. Left palpus of male from ovitside. 

 ,, 4. Right palpus of abnormal specimen. 

 ,, 5. ,, ,, ,, normal female. 



pt. 2), the left palpus was of the female form, while the right 

 was of the male type, with well-developed palpal organs. 

 The central portion of the large and asymmetrical epigyne was 

 of the normal female form ; so also was the left part of the 

 scape. The right side of the latter process however, was quite 

 short. The specimen was thus male on the right side and 

 female on the left. 



In the other, a Maso sundevallii Westr., place and date of 

 capture now unknown, the left palpus is of the male form, 

 the palpal organs being again well developed (fig. 3) ; the right 



1910 June I. 



