206 



whereas in A. fenestralis it rises between the inner and outer, is 

 short and triangular, somewhat blunt, not longer than it is broad 

 at the base, and has a little tooth on the under (fore) side, which 

 is absent in A. obustus. 



Very similar to A. fenestralis is A. similis (Blackw.) 1861 (Spid. 

 of Gr. Brit., I, p. 141, PI. IX, fig. 89), but it is distinguishable 

 by the tibial joint's middle process in cT being cloven into two 

 points, an upper and an under, and by the vulva being broader be- 

 hind than before, not the reverse, as in A. fenestralis. The spine- 

 armature on the legs is also somewhat different, the thighs of the 

 1 st pair in A. fenestralis having only 2, but in A. similis, 5 spines 1 )- 



l) The following species of the genus Amaurobius seem to be as yet 

 undescribed : 



Amaurobius Scopolii N. Mas: Oculi laterales antici paullo majores quam 

 laterales medii, qui spatio inter se distant, quod oculi diametrum non aequat. 

 Palporum pars tibialis supra procursus duos ostendit, quorum exterior dimidio 

 longior quam latior est, in apice angulis rotundatis truncatus, ibique subtus dila- 

 tatus; procursus interior, cum exteriore angnlum rectum formans, eo paullo bre- 

 vior at duplo latior est, non tam longus atque latus, in apice oblique truncatus, 

 angulis rotundatis ; ipse apex partis tibialis subtus in procursum brevem productus. 

 Femora pedum l:mi paris aculeis saltern 4: 1, 1 supra, 1 antice, 1 postice; fe- 

 mora 2:di paris aculeis circiter 7 armata. Cephalothorax et sternum luteo-fusca, 

 palpi ejusdem colons, partibus duabus ultimis fuscis; pedes luteo-fusci, immacu- 

 lati , coxis subtus clarioribus ; abdominis pictura ex tribus maculis longitudinalibus 

 pallidis in dorso antice et pone eas serie utrinque macularum obliquarum pallida- 

 rum constare videtur, ideoque picturae A. ferocis sat similis. Long, cephaloth. 5, 

 abdominis 4y 2 , pedum l:mi paris 20y 2 , 2:di 16y 2 , 3:tii 12, 4:ti 16V 2 millim. 



Femina (an hujus speciei?): Cephalothorax 5, abdomen 6, pedes l:mi pa- 

 ris 13, 2:di 11 y 2 , 3:tii 9y 2 , 4:ti 13 millim. longi. Oculi laterales antici anticis 

 mediis majores. Femora l:mi paris aculeis saltern 2: 1 supra, 1 antice. Vulva 

 fere ut in A. jugorum L. KOCH: aream format antice rotundatam, aeque fere lon- 

 gam atque latam, quae postice incisuram profundam, antice sinuatam (cordiformi- 

 quadrangulam) ostendit, elevationem late cordiformem includentem: haec elevatio 

 (Tlatte der Epigyne" L. Koch) igitur postice acuminata, non , ut in A. jugorum , 

 postice late et leviter rotundata. Color ut in $ fere, parte cephalica infuscata. 

 Amaurobio jugorum J (cujus $ ignotus est) haec J valde affinis videtur; in A. 

 jugorum vero, secundum L. Koch, forma vulvae, ut diximus, paullo alia, et pe- 

 des lani paris uno millim. longiores quam pedes 4:ti paris; in ? nunc descripta 

 mini omnino eadem longitudine esse videntur pedes parium lani et 4:ti. 



Ad Mcaeam et Herculis Monceci Portum (Monaco) sub lapidibus hanc spe- 

 ciem inveni. 



Amaurobius Cyrilli N. Mas: Oculi laterales antici majores quam medii 

 antici, qui inter se spatio distant, quod oculi diametrum non aequat. Palporum 

 pars tibialis supra procursus tres porrectos, paullo divaricantes , aeque fere longos 



