1874.] NEW SPECIES OF ERIGONE. 429 



appear to have been hitherto uudescribed. Descriptions and figures 

 of these new species are subjoined, as also of another of the same 

 genus received from the Oregon Territory, where it was found by 

 Lord Walsingham, who kindly sent it to me among some other 

 Spiders. 



The discovery of Spiders of this curious group in North America 

 is very interesting. It may be said now that the genus Erigone 

 occurs over the greater part of the Northern hemisphere. I have 

 received examples of it from Baikal (in the east) to Oregon (in the 

 west), its southernmost limits at present known being Morocco and 

 Cairo ; and it has been sent to me also from North Greenland. 



The new species now described are brighter and more richly coloured 

 than the greater portion of known European species ; and nearly all of 

 them (though severally belonging to very distinct groups of the genus) 

 have more or less of the caput black, the thoracic region being either 

 yellow or rich orange ; the occurrence of these two distinct, and 

 distinctly defined, colours on the cephalothorax is unknown, so far as 

 I am aware, in any of the numerous species found in Europe. 



From the information received from Mr. Emerton we may expect 

 to find that North America will, when fairly searched, prove exceed- 

 ingly rich in the species of these minute Spiders ; and probably 

 among them there will be found some presenting new and grotescpie 

 forms of the caput, and perhaps still more (apparently) eccentric 

 structures in the palpi and palpal organs of the male than we 

 find even now in many known species, while at the same time we 

 shall probably find many among them identical, or nearly so, with 

 European forms. 



My thanks are especially due to Mr. Emerton and Lord Walsing- 

 ham for giving me the opportunity to describe and figure the sub- 

 joined novelties. 



Genus Erigone (Westr.). 



Erigone atra. 



Erigone atra, Bl. Edinb. Phil. Mag. hi. No. 15, p. 195. 



Neriene longipalpis, Bl. Spid. Great Brit. & Ireland, p. 274, 

 pi. xii. fig. 188, and pi. xxii. fig. C. 



Erigone vagabunda, Westr. Aran. Suec. p. 597. 



An adult male example, which I cannot distinguish from the above 

 species, was contained in the small collection of the genus Erigone 

 kindly sent me in January last from Boston, Massachusetts, U.S.A., 

 by Mr. J. H. Emerton. It was found at Beverley, Mass., in June 

 1873. 



Erigone dentigera, sp. n. 



Adult male, length very nearly 1| line. 



This species is very nearly allied to E. longipalpis (Sund.), both in 

 size, colour, and form, but may easily be distinguished from it by a 

 small but very distinct tooth-like spine beneath the radial joint of the 

 palpus and by the less-pointed form of the fore extremity of that 

 joint. 



