100 



mentioned (without description) as "nearly allied to E. dentipalpa, 

 but with the edges of the cephalothorax armed with spines, E. ur- 

 mala", which probably is the same as E. longipalpis. Menge's E. 

 dentipalpis (at least that described in Preuss. Spinn.) is in fact the 

 same as E. vagabunda Westr. ; E. dentipalpis Westr. he has not 

 described. 



In E. dentipalpis cf the inferior apophysis of the tibial joint 

 of the palpus has, in the middle of its under surface, a conical, 

 pointed tooth, with in E. longipalpis and E. vagabunda is either entirely 

 absent or only represented by a very small tubercle. In E. denti- 

 palpis the upper edge of the extremity of the tibial joint is drawn 

 out into two short apophyses, and the joint, when viewed from 

 above, is almost as broad as it is long: in E. longipalpis and E. 

 vagabunda the upper egde of the apex of the joint forms but one 

 apophysis (it is the inner of the two in E. dentipalpis that is absent 

 in E. longipalpis and E. vagabunda), and the joint is more com- 

 pressed at the end , and , when seen from above , considerably longer 

 than it is broad, especially in E. longipalpis. In this last species 

 the superior apophysis of the tibial joint, viewed directly from above, 

 is triangularly pointed: in E. vagabunda on the contrary, when viewed 

 from the same direction, it is broad and blunt at the apex, almost 

 truncated. In E. longipalpis cT the trochanteral joint appears to be 

 a little longer than in the two other species, about double as long 

 as it is broad at the apex; it has sometimes, but not always'), a 

 few small teeth even on the inner side, as also on the trochanteres 

 of the first pair of legs, the thighs of which are armed with a row 

 of such spines at the base, also on the inner (anterior) side. The 

 genital bulb, seen from the inner side, exhibits at the apex a coarse 

 tooth directed forward and acompanied beneath by a pale , slender ap- 

 pendage, and behind this tooth, towards the middle, two teeth pointing 

 downward. In E. vagabunda on the contrary, the bulbus, seen in pro- 

 file , shows at the extremity a very large tubercle directed downward 



1) A close examination of a greater number of specimens of all three spe- 

 cies — which probably have branched off from a common root within a compa- 

 ratively recent period — will show that they vary a little on several important 

 points, such as the relative length of the tibial and trochanteral joints of the 

 palpi etc. This appears to me to prove, either that these three species have 

 not yet attained their definitive and settled form, though they may always be 

 easily distinguished from each other, or that they are on the point of dividing 

 themselves into new varieties or incipient species. 



