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may indeed, under such circumstances, reasonably entertain doubts 

 of the specific difference between these two so-called species, and I 

 shall not be surprised, if L. agrestis should at last be found to be 

 only a variety of L. agricola. Nevertheless I ought to mention, 

 that in the few cf-specimens of L. agricola that I have had the oppor- 

 tunity of examining, I have found the outward and forward directed 

 transverse piece or spiue on the under side of the bulbus genitalis 

 longer than in L. agrestis cf\ at least 3 times as long as it is 

 broad, and somewhat tapering on both sides toward the blunt apex, 

 whereas in L. agrestis it only appears to be 2 — 2'/ 2 times longer 

 than it is broad, and rather obliquely truncated at its extremity. 

 The specific distinction must depend upon whether this difference be 

 constant or not: I for my part am most inclined to consider L. 

 agricola and L. agrestris as varities only of one and the same species. 



Blackwall does not state that the lateral bands are resolved 

 into spots in $ of his L. fluviatilis, and it seems therefore prob- 

 able, that L. agrestis is also included in that species. His descrip- 

 tion of the colour of the male's tarsi shows that he had c? of the 

 right L. agricola before him. C. Koch's description of the lateral 

 bands on the cephalothorax of his L. arenaria indicates that he also had 

 seen specimens of L. agrestis; but his description of the male suits only 

 L. agricola. Ohlert's description of the female of his Pardosa are- 

 naria agrees only with L. agrestis, but the description of the tarsi, 

 of which it is stated, that the dark ring at the extremity is often 

 indistinct, "especially in the males 1 , shows that he also had i. agri- 

 cola before him. — L. Koch has favoured me with full-grown Ger- 

 man specimens of L. agricola under the name of L. arenaria C. Koch, 

 and of L. agrestis under the name of L. decipiens L. Koch. 



The vulva has exactly the same appearance in both species: 

 it consists, like that of L. monticola, L. palustris (tarsalis), L. hy- 

 perborea, and some other species not hitherto found in Sweden — 

 which might all be included under the appellation of "the L. mon- 

 foWa- group" — of a somewhat large, elevated, reddish brown area, 

 broader behind: as in L. monticola, the posterior corners of this 

 area in L. agricola and L. agrestis have the form of small tuber- 

 cles pointing outwards, and are neither fiat and rounded, nor bent 

 forward. Near its anterior extremity this area in L. agricola and 

 L. agrestis has on both sides, at the margin, a shorter, obliquely 

 longitudinal depression or furrow, and along its middle extends a 

 tolerably deep furrow somewhat dilated behind, which furrow thus 



