^■^\M\)i^d Systematic Arrangement of British Spiders. 397 



seodiApt-Stiiiv. p. 395), for it is not only much smaller than 

 that S])ecies, but its colours, which ai-e dissimilar, constitute by 

 their arrangement a different design both on the cephalo-thorax 

 and abdomen ; there is some diversity also in the structure of 

 its palpal organs, and in the relative size of the four minute eyes 

 forming the transverse frontal row. . - i _; , 



14. Lycosa latitans. 



' •■■ '•■ '■■■ ■ '■.n^^rv.'ji.^V 



Lycosa latitans, Blaclcw. Linn. Trans. toL xvui. p. 612. 



{Potamia) pahistris, Koch, Die Arachn. B. xv. p, 4. tab. 505. 



JBijgo;;i415 1416, ii 



•(..'+.. ■ t 



Females of this species, which appears to connect the terres- 

 trial with the semiaquatic Lycosae, may be found in the months 

 of May and June, under stones in moist situations in the woods 

 of Denbighshire, with their cocoons attached to their spinners. 

 The cocoon is globular, measuring |^th of an inch in diameter, 

 and is composed of compact white silk encircled by a narrow 

 zone of a slighter texture ; it comprises 40 or 50 spherical eggs 

 of a yellow colour, having no adhesion among themselves. 



Lycosa latitans is placed by M. Walckenaer among the syno- 

 nyma of Lycosa fumigata (Hist. Nat. des Insect. Apt. t. iv. 

 p. 395) ; but on insufficient grounds, as it is very much smaller 

 than that species, and differs from it in the design formed by 

 the distribution of its colours, which likewise present some 

 diversity. 



15. Lycosa piratica. 



Lycosa pirafiea, Wslck. Hist. Nat. des Insect. Apt. t. i. p. 339 ; Hahn, 

 Die Arachn. B. i. p. 107. tab. 27. fig. 80; Sund. Vet. Acad. 

 Handl. 1832, p. 193 ; Blackw. Linn. Trans, vol. xix. p. 120. 



{Potamia) piratica, Koch, Die Arachn. B. xv. p. 1. tab. 505. 



fig. 1413, 1414. 



palustris, Koch, Uebers. des Arachn. Syst. erstes Heft, p. 22. 



Lycosa piratica frequents marshes and the margins of pools 

 in England and Wales ; it runs rapidly on the surface of water, 

 even when encumbered with its cocoon, and frequently takes 

 refuge from danger beneath the surface of that liquid, concealing 

 itself among the leaves of aquatic plants, the air confined by the 

 circumambient water among the hairs with which it is clothed 

 enabling it to remain immersed for a considerable period of time. 

 In June the female deposits from 80 to 100 spherical eggs of a 

 deep yellow colour, not agglutinated together, in a globular 

 cocoon of compact white silk, encircled by a narrow zone of a 

 slighter texture ; it measures about |^th of an inch in diameter, 

 and the young, when extricated from it, attach themselves to 

 the body of their parent. 'v" if^->i{iiJiJ^ m. v^iJ;vv^u\5^" 



