188 



L. Koch has in his above-cited work (p. 18, Taf. I, fig. 11) 

 under the name of Pythonissa montana described a species, which 

 has probably often been confounded with G. lucifuga. Both species 

 are also met with in Sweden, yet Westring seems not to have seen 

 G. montana (L. Koch). The two species are very closely allied, and 

 the females are often difficult to distinguish. As however Dr Koch 

 has himself been kind enough to identify several specimens of both 

 species in my collection, I cannot be mistaken with respect to the 

 forms he intended, although my notion of the differences between them 

 somewhat differs from Dr Koch's, as will appear in the course of 

 the following remarks. Of the species that I term G. lucifuga, I 

 possess not only Swedish and German specimens, but also a $ from 

 the neighbourhood of Paris kindly given me by Simon under the name 

 of " Pythonissa lucifuga (Walck.)". 



As well in G. lucifuga as in G. montana (as also G. lugubris 

 and G. muscorum) the anterior lateral eyes are visibly larger than 

 the anterior central. In both species the tibice of the 3 rd pair has 

 spines behind (in G. lucifuga I have observed on these tibiae behind 

 1 , 1, 1 or 1, 1, in G. montana 1, 1, 1 or 2, 1, 1; in both, be- 

 fore 1, 1, 1, beneath 2, 2, 2). G. montana is rather smaller than 

 G. lucifuga, and the legs of the former are slenderer, and absolutely 

 indeed shorter than those of the latter, but in proportion to the 

 length of the cephalothorax , those of the cf are considerably, those of 

 2 slightly, longer in G. montana than in G. lucifuga. The cephalo- 

 thorax of G. lucifuga cf (as that of $ of both species) is longer than 

 the patella and tibia of the 4 th pair together, and that pair 2 3 / 4 — 3 

 times as long as the cephalothorax (the cephalothorax about 6 7 2 , 

 the 4 th pair of legs about 18 '/ 2 millim. long); the tibial joint of 

 the palpi is somewhat shorter than the patellar, the length and 

 breadth being about equal; it is at the extremity, above, towards 

 the outer side, produced into a tapering, spine-like process, the apex 

 of which is curved downward, and which is considerably shorter than 

 the tibial joint itself. The lamina bulbi is as long as the patellar 

 and tibial joints together, the bulbus somewhat swollen and uneven 

 on the under side at the base. — In G. montana cT the cephalothorax 

 is not longer than the patella and tibia of the 4 th pair together, 

 which pair is 3'/ 4 — 3'/ 2 times as long as the cephalothorax (cephalo- 

 thorax about 5y 2 , 4 th pair of legs about 19 millim.). The tibial 

 joint of the palpus is somewhat shorter than the patellar joint, and, 

 when viewed from the inner side, scarce more than half so long as 



