58 



description of his L. terricola, and is shown also in his figures. The 

 colour of the abdomen is however subject to much variation. Koch 

 has probably, under the name L. terricola, confounded other species 

 with the L. alacris of Blackwall, among them L. terricola Blackw. 1 ) 

 and perhaps Dathyphantes terricola Menge. — L. terricola Blackw. is 

 widely different from L. tenebricola Westr. , and is identical with 

 L. pygmaia Westr. (tenebricola Beuss, nob.), as I see by specimens 

 kindly given me by Cambridge, and as will be shown further on under 

 the head of that species. On the other hand L. terricola Sill 2 ) is 

 perhaps = L. tenebricola Westr. — The description of the L. terricola 

 of Ohlert shows at once that it is the same as L. dorsalis Beuss, Westr. 

 (L. Claytonice Blackw.), as I also have found established by the com- 

 parison of typical specimens sent me by Westring and Ohlert. — Ba- 

 thyphantes terricola Menge is identical with L. nigrina Westr. (L. 

 pulla Blackw.), according to specimens of both sexes, kindly given 

 me by Menge himself. — As the specific name "terricola C. Koch" 

 has already been applied to at least three different spiders, 1 have 

 not thought it advisable to designate by the same name an additio- 

 nal species , Westring's L. tenebricola , although this spider does seem 

 to me to correspond best with C. Koch's description and figures of 

 L. terricola. I have therefore adopted the first certain name by which 

 the species has been described. A male specimen, sent to Cambridge, 

 has by him been declared identical with L. alacris Blackw.; he has 

 also kindly sent me the typical specimens of the Lin. alacris of 

 Blackwall. 



In L. alacris, or tenebricola Westr., the vulva forms, seen from 

 the side, a strong, rounded protuberance, the central, more projecting 



1) To this species (= L. pygmcea Westr.) the following passage seems to 

 apply: "Nicht ungewohnlich ist die Biickenfarbe verdunkelt und die Bogenstreifen 

 kaum sichtbar, zuweileu so sehr, dass nur iiber den Spinnwarzen gelbliche Quer- 

 fleckchen und in den Seiten weissliclie Fleckchen zu sehen sind." (Koch, 1. c, p. 126). 



2) " . . . Vorderleib dunkel gelbbraun mit dunkleren Strahlenstrichen. Die 

 Presszangen von derselben Farbe. Die Taster rothlich ockergelb. Der Hinterleib 

 oben gelbbraun, auf dem Biicken yorne ein in der Mitte etwas erweiterter Langs- 

 streif kaum bis in die Halfte der Lange reichend, und hinter demselben seitwarts 

 geschwungen, dreieckige Bogenstreifen bis zu den Spinnwarzen hintereinanderlie- 

 gend , schwarz , zwischen deisen beiderseits der Lange nach hellweisse Plecken aus 

 kleinen kleinen Punkten bestehend; die Seiten und der Bauch schwarz. Alle Beine 

 gleichfarbig ockergelb. Uebrigens andert diese Spinne mannigfach ab. Lange 1 '/ 2 — 4" 

 (probably a misprint for l'/ 2 — 2"')." Sill, Dritter Beitrag z. Kenntn. d. Crust, u. 

 Arachn. Siebenbiirgens , in Verhandl. u. Mittheil. d. Siebenbiirg. Vereins f. Natur- 

 wissensch. zu Hermannstadt, Jahrg. XLTI (1863), p. 44. 



