338 



Simon, in his Hist. Nat. d. Araigne'es, p. 510, among the sy- 

 nonyms of "Troch. agretyca" takes up T. inlricaria C. Koch (Die Arachn., 

 XIV, p. 136, fig. 1367), which is a species widely differing both from 

 T. ruricola and T. terricola, and particularly remarkable for the po- 

 sition of the eyes. Conf. Thor. , On Eur. Spid., p. 193. 



If Hahn's L. ruricola really were, as that author states, differ- 

 ent from his L. alpina, it would most probably belong to T. terri- 

 cola; for L. alpina is clearly shown by its greenish colour to be 

 identical with T. ruricola. C. Koch, who had seen the original 

 specimens of L. alpina, also says (loc. cit. , p. 141) that they are 

 young, not fully developed individuals of T. ruricola. This explains 

 Hahn's statement that "L. alpina" is smaller than "L. ruricola". 



Lyc. ruricola Hentz ') is a species quite different from the Eu- 

 ropean Troch. ruricola, and appears to belong to the genus Tarentula. 



C. Koch seems to have been the first who separated T. terri- 

 cola from T. ruricola; but he has erroneously identified the former 

 with Ar. trabalis Clerck and Lyc. trabalis Sond., which are identical 

 with C. Koch's L. vorax; Yid sup., p. 322, and Rec. crit., p. 62. 

 — The males of T. ruricola and T. terricola are, as is known, ea- 

 sily i istinguished from, each other by the metatarsi of the 1 st pair 

 being in the first named species of the ordinary cylindrical form, not 

 thickened, and that pair's tarsi being of the same (generally, though 

 not always) dark colour as the tarsi and tibiae, whereas in T. ter- 

 ricola cf the metatarsi of the 1 st pair are from the base and apex 

 towards the middle somewhat thickened, almost fusiform, and the 

 tarsi of the 1 st pair are paler than the tibia? and metatarsi of the 

 same pair, yellowish brown. In T. ruricola cT the tibial joint of 

 the palpus is at least half as long again as it is broad, and the la- 

 mina is shorter than the two preceding joints put together; in T. 

 terricola $ the tibial joint of the palpus is not half as long again 

 as it is broad, and the lamina is equal in length to the patellar and 

 tibial joints put together. The bulbus in both species exhibits on 

 the outer margin, near the middle, a little pointed process, which in 

 T. ruricola is slenderer and has the form of a fine, inward-pointing 

 spine; in I. terricola it is somewhat coarser and ought rather to 

 be called a sharp, inward-curved tootb. — The females it may some- 

 times be difficult to distinguish; in T. ruricola however the back of 



1) Descr. and fig. of the Aran, of the United States, in Boston Journ. of 

 Nat. Hist., IV, p. 387, PI. XVII, figg. 5, 6. 



