450 Mr. W. H. Benson on a new species of Pterocyclos. 



who captured it in Berwickshire. Its snare is usually constructed 

 among rank herbage growing in and near woods, and it pairs in 

 May and June. 



105. Linyphia fuliginea. 



Linyphia fuliginea, Blackw. Lond. and Edinb. Phil. Mag. Third 

 Series, vol. hi. p. 349 ; Research, in Zool. p. 401. 

 Linyphia fuliginea is found in various parts of North "Wales 

 and Lancashire ; it pairs in June, and constructs a snare of 

 moderate dimensions among the grass of meadows and pastures. 

 The male closely resembles the male of Linyphia pratensis, but 

 may be distinguished from it by its inferior size, and by the 

 structure of its palpal organs. 



106. Linyphia rubea. 

 Linyphia rubea, Blackw. Linn. Trans, vol. xviii. p. 661. 



In the months of May and June this spider spins a web of 

 moderate extent among bushes in woods and coppices in North 

 Wales and Lancashire, where it is not uncommon. An imma- 

 ture female of this species was transmitted to me from Berwick- 

 shire by Mr. J. Hardy in December 1848. 



XXXVI . — Description of a new species of Pterocyclos, Benson, 

 from Southern India. By W. H. Benson, Esq. 



Pterocyclos nanus, nobis, n. s. 



Testa profunde perspective umbilicata, depressa, discoidea, albida, 

 fascia media strigisque undulatis castaneis superne ornata ; spira 

 prominula, saturatiore ; anfractibus A\ convexis, ultimo supra so- 

 luto ; apertura obiiqua, circulari ; peristomate duplicata, margi- 

 nibus sulco leviter impresso vix discretis, interno superne profunde 

 recteque inciso, externo reflexiusculo, supra sinum alam angustam 

 fornicatam, antice breviter descendentem, angulatam, formante. 



Diam. major 10, minor 8, alt. 5 mill. 



Hab. ad basin montium " Nilgherries," India? Australis. 



This interesting addition to the genus was sent to me by 

 Dr. Jerdon with specimens of Pterocyclos bilabiatus, Sow. Pos- 

 sessing a similar deep umbilicus, narrower than in the other 

 known species, it was overlooked as a young and imperfect spe- 

 cimen. On examination it proves to have arrived at its full 

 growth, being allied in the characters of the aperture to Pt. ru- 

 pestris, nobis, but differing from the smallest varieties of that 

 shell not only in size and in the form of the umbilicus, but also in 

 the less curvature of the incision under the wing, which is more- 

 over less expanded, and does not touch nor cover any part of the 

 preceding whorl. The operculum is unknown. 



London, November 8th, 185 L 



