56 



"Specimen masculum seta gracili in parte palporum 

 patellari" {Lin. leprosa Ohl.): 



1865. Linyphia LEPROSA Ohl., Arachn. Studien, p. 12. 

 1867. ,, ,, id., Aran. d. Prov. Preuss., p. 47. 



Walckenaer's L. domestica is probably a different species from 

 Westring's L. domestica, which, with Westring and Blackwall, we 

 consider as the spider which Keuss has described under that name. 

 Of Leptyphantes muscicola Mengje, I have, through the liberal kindness 

 of Menge himself, had typical specimens to examine. Swedish speci- 

 mens of L. domestica, which I sent to Cambridge, have by him been 

 pronounced identical with L. minuta Blackw. — L. minuta is particu- 

 larly common in Sweden. I have also specimens from the Norwe- 

 gian Finnmark (given me by Prof. Th. Fries) , from Finnland (Al. v. 

 Nordmann), and from the neighbourhoods of Kissingen and Trave- 

 munde in Germany. 



Westring mentions (p. 116) a cf -specimen which, instead of 

 the coarse, straight or slightly ^-curved bristle on the patellar joint 

 of the palpus, had a fine, pointed bristle curved forwards on the same 

 spot. This is a quite different, though extremely similar species, which 

 has been described by Ohlert under the name of L. leprosa, and of 

 which I have specimens, both from Sweden, Finnland and England, 

 the latter sent me by Cambridge under the name of L. confusa Cambr. 

 Prof. Ohlert has himself sent me a full-grown male and some 

 younger specimens of both sexes of his L. leprosa. — The long bristle 

 on the patellar joint is, in L. leprosa, finer than the spines of the 

 legs, gradually tapering to the extremity; in L. minuta it is somewhat 

 coarser than the spines, and a little thicker between the middle and 

 the tapering extremity. The patellar joint itself, which in L. minuta 

 is in front drawn out into a short blunt process, from which the 

 coarse bristle issues, is there, in L. leprosa, regularly and suddenly 

 rounded off. Under the microscope the bulbus genitalis also shows 

 some peculiarities: I will only mention that in L. leprosa the last 

 but one of the leaf-like parts it contains ("der Eindringer" Menge?) 

 is longer than the rest and cloven at the apex , and its two unequal 

 segments each again cloven at its termination into two short diver- 

 gent tooth-like parts. In L. minuta "der Eindringer" has an enti- 

 rely different appearance (conf. Menge, loc. cit.). In my specimens of 

 L. leprosa the thighs of the 1 st pair alone have 1 spine (as in L. 



