Mr. White on new or little known Arachnida. 473 



fly continues to build several cells alongside and upon each 

 other : they destroy an amazing number of spiders ; they com- 

 monly put all, or the most part of one particular species toge- 

 ther in one cell, many of them of very rare species, and such 

 I imagine must live chiefly on the tops of branches of the 

 loftiest trees, as I could never afterwards meet with these spe- 

 cimens of spiders. Upon opening several of these cases at 

 once, it affords (as you may judge) a most curious and pleasing 

 sight — such a large number of spiders of the most beautiful 

 colours and rarest species. Could it be possible still to con- 

 tinue to preserve them in their beauty and freshness, they 

 would make a wonderful cf)llection of natural history.'^ It 

 is much to be desired that the other volumes of Baron Walcke- 

 naer's elaborate work were published*. I may add, that spe- 

 cimens of all the species here described, unless otherwise in- 

 timated, will be found in the collection of the British Mu- 

 seum, and that I have made figures of most of them, which 

 I intend to publish hereafter. 



1. Linyphia {Leucauge) argyrohapta, n. s. 



Brownish yellow ; chelicera darker, at end blackish brown; claws 

 black. Abdomen silvery, with five brownish black (when alive 

 red) longitudinal lines all meeting at the end, the middle one 

 alone taking its origin from the base, and having a lineolet of 

 the same colour extended nearly to the lateral black line, and 

 two small approximating parallel lines directed backwards, ari- 

 sing from about the middle, and extending to the irregular line 

 on each of its sides; the end of the abdomen, where all the 

 lines meet, is brownish black, and there are two distinct silvery 

 spots ; the body beneath is brownish black, with a whitish line 

 on each side, and a dot beneath it. 



Chelicera vertical, oblong, cylindrical, shining; first joint with 

 one or two teeth at end, upon which the long hooked claw 

 closes inwards; this claw is straight at the base and then 

 hooked. 



Eyes eight, on two transverse lines ; four placed in the middle, the 

 two posterior further apart ; the side eyes of last lines are in 

 pairs. 



Maxillae dilated at end, the outside with a few hairs. 



Palpi slender ; fifth joint as long as second, ending apparently in 

 a claw, and hairy. 



Mentum small, not very distinct from the heart-shaped sternum. 



Cephalothorax depressed, narrowed in front, dilated on the side, 

 sinuated behind, with a deep impression beyond the middle, in 

 front of which are two impressed lines directed sideways, and 

 extending forwards to the base of the narrowed part. 



* July 2. Since this paper was written the 2nd volume of Walckenaer's 

 work has been published. 



