and Systematic Arrangement of British Spiders. 257 



Specimens of this remarkable spider, which is the only spe- 

 cies belonging to the family Mygalidce at present known to be 

 indigenous to Great Britain, have been captured by Dr. Leach 

 in the vicinity of London and Exeter. See the Supplement to 

 the 4th, 5th, and 6th editions of the ' Encyclopaedia Britannica,' 

 article Annulosa. 



Family Lycosidce. 



Genus Lycosa, Latr. 



2. Lycosa agretyca. 



Lycosa agretyca, Walck. Hist. Nat. des Insect. Apt. torn. i. p. 308 ; 



Blackwall, Transactions of the Linusean Society, vol. xix. p. 1 18. 

 — ^ ruricola, Latr. Gen. Crust, et Insect, torn. i. p. 120 ; Sundevall, 



Kongl. Vetenskaps-academiens Handlingar, for ar 1832, p. 192. 

 Trochosa trabaUs, Koch, Die Arachn. (Fortsetzung des Hahn'schen 



Werkes), B. xiv. p. 141. tab. 492. fig. 1371-1374. 



Lycosa agretyca occurs in old pastures and on heaths in En- 

 gland, Wales and Scotland. In the month of June the female 

 excavates an elliptical cavity in the earth beneath stones, into 

 which she retires with her cocoon, which is globular, composed 

 of fine white silk of a compact texture, and is encircled by a nar- 

 row zone of a slighter fabric; it measures |th of an inch in dia- 

 meter, and contains about 110 spherical eggs of a pale yellow 

 colour, not agglutinated together. The cocoon is attached to the 

 spinners of the female by short lines of silk, and the young, when 

 they quit it, mount upon her body, and so accompany her in all 

 her movements. This species frequently passes the winter in a 

 toi'pid or semitorpid state in the cavities which it forms in the 

 eai-th under stones. 



An adult female Lycosa agretyca, taken in the spring of 1849, 

 was destitute of the posterior eye on the right side. 



The genus Trochosa, which M. Koch has proposed to consti- 

 tute with this and some other species of Lycosce, is based on spe- 

 eific characters solely. 



3. Lycosa campestris. 



lycosa campestris, Walck. Hist. Nat. des Insect. Apt. t. i. p. 309. 

 ruricola, Hahn, Die Arachn. Band i. p. 103. tab. 26. fig. 77 



(misnumbered 76 in the text) ; Koch, Uebersicht des Arachn. 



Syst. erstes Heft, p. 21. 

 Trochosa ruricola, Koch, Die Arachn. Band xiv. p. 138. tab. 491. 



fig. 1369, 1370. 

 Titulus 26, Lister, Historite Animalium Angliae tres Tractatus, De 



Araneis, p. 78. tab. 1 . fig. 26. 



Meadows and pastures in England and Wales are the favourite 

 haunts of this species, which pairs in May. In June the female 

 Ann. ^ Mag. N. Hist. Ser. 2. Vol. vii. 17 



