56 ON BRITISH ARACHNIDA. 



North Yorkshire, by Mr. H. H. Harrison, in June, 1909, 

 and were sent to me by the Rev. J. E. Hull. It is a very 

 distinct species, and has not been recorded, so far as I 

 am aware, excepting in France, since its description in 

 1872 from Bavaria. Its occurrence, therefore, is of 

 much interest. This is its first record as a British 

 species ; the genus being also new to Britain. 



Styloctetor penicillatus, Westr. 



Adult females found in 1909 were received from 

 Ireland from Mr. D. R. P. Beresford. 



Troxochrus cirrifrons, Cambr. 



An adult male was received from the Rev. J. H. Bloom 

 from Whitchurch (Stratford-on-Avon) in July, 1909, 

 also a male, and (taken with it) two females, from the 

 East Coast of Yorkshire, from Mr. W. Falconer ; pre- 

 sumably these last may be the females of T. cirrifrons. 

 This species is very nearly allied to T. scabriculus, Westr., 

 and indeed is considered by Mons. Simon to be identical 

 with that species, and to differ only in the male sex, 

 which it does remarkably. I can, however find in the 

 females received from Mr. Falconer a difference from 

 some others which I believe to be the typical form of T. 

 scabriculus, Westr. These others were taken by myself 

 at Basingfield, Hampshire, some years ago, in company 

 with an equal number of males, and they correspond 

 exactly with the female figured as that of T. scabriculus, 

 Westr.. by Bosenberg. (Die Spinner Deutschlands, p. 

 203, PI. xviii., Fig. 284.) M. Simon relies chiefly, for the 

 identity of scabriculus and cirrijrons, on the two forms 

 being always found together (i.e., at the same time and 

 place) ; but this I have by no means myself proved to be 

 the fact. Indeed, I have on several occasions received 

 each of these male forms when no example of the other 

 occurred. This evidence however, alone, would of 

 course not be conclusive. (Bosenberg makes no mention 



