343 



In P. Knorrii (Scop.),n. , or L. piscatoria C. Koch, the legs and 

 palpi are brownish yellow, with very distinct dark rings not only 

 on the thighs, but also on the following joints. This species is 

 darker and appears to be a little larger than P. piraticus; at least 

 I have a male specimen, the cephalothorax of which is 4 millim. 

 long. The legs also are comparatively something longer, at least 

 in cT, in which they are sometimes as much as 4 times the 

 length of the cephalothorax, which in $ is about % , in cf about 1 

 millim. shorter than patella + tibia of the 4 th pair; its breadth, as 

 well in the female as in the male, is at least '/, millim. less than 

 the length of the tibia of the same pair. The brownish yellow mar- 

 ginal bands on the cephalothorax are on the upper border coarsely 

 and deeply indented. The sternum is dark-brown or blackish, with 

 a brownish yellow middle-stripe. The anterior row of eyes is not 

 longer than the- middle one, its centre eyes are scarcely larger (in 

 ¥ rather smaller) 4han the lateral eyes, and all at about equal di- 

 stances from each other. The mandibles are in the female consider- 

 ably shorter,- than, in cf hardly more than half the length of, the 

 metatarsi of the 1 st pair. The vulva is formed by two tubercles at 

 the rim?a, genitalis, much as in P. piraticus. The tibial joint of the 

 palpus / in g is double as long as it is broad, somewhat longer than 

 the patellar joint; the lamina is narrow and long, not broader than 

 the,/ tibia of the Impair; the bulbus is less turgid than in P. pira- 

 tic:us, and terminates (when viewed from the side) in front in a 

 <Voarse, pointed, diaphanous, upward-curved process or spine. 



P. hygrophilus N , or Tj. piscatoria Blackw. (= Pot. piscatoria Ohl., 

 Aran. d. Prov. Preuss., p. 132, and also = the chief form of L. uli- 

 ginosa Westr. — non Thor. — , according to specimens communicated 

 by Ohlert and Westring), is in colour very like P. Knorrii, but it 

 is smaller, and its cephalothorax is broader and more rounded at the 

 sides than that of P. Knorrii; it is further and easily distinguished 

 from that species and from P. piraticus by its very peculiar organs 

 of copulation, and by the shorter legs of cf. The legs are yellowish 

 brown with not very distinct dark rings: the edge of the cephalo- 

 thorax is black or blackish brown, and the yellowish brown mar- 

 ginal bands coarsely and deeply indented on the upper edge. The 

 cephalothorax is as long as, or but inconsiderably (not '/ a millim.) 

 shorter than, the tibia + patella of the 4 tu pair; its breadth has 

 great as, not less than, the length of the tibia of the same pair. 

 In my specimens the cephalothorax is 2'/ 2 — 3'/ 4 millim. long, the 



