SCIENCE-GOSSIP. 



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allied genera by the point at which the palpus joins 

 the maxilla being nearer the extremity than the base. 



Prosthesima electa C. Koch. [Drassus 

 pumitits Bl. ) 



Length. Male 4 mm. 



Cephalo-thorax reddish-brown ; legs, femora yel- 

 lowish-red, genua and tibiae brownish-black, metatarsi 



tarsal and tarsal joints of a pale grey colour. 

 Abdomen black and rather hairy. This^ uncommon 

 spider occurs in similar situations to the last. 



Frosth.esi.ma lutetiana L. Koch. 



Length. Female 6.3 mm. 



Cephalo-thorax dark brown. Legs brown, the 

 tarsi being reddish-brown. Abdomen blackish- 

 brown, rather hairy. This is a rare spider : it has 

 been found in Scotland. 



Prosthesima latitans L. Koch. 



Length. Male 5.3 mm. 



Cephalo-thorax black. Legs blackish-brown, the 

 tarsi being yellow. Abdomen jet-black, hairy. This 

 spider has been found in Dorset, and is extremely 

 rare. 



Prosthesima latreillii Sim. 

 Length. Male 4.3 mm., female 6.4 mm. 

 Cephaio-thorax blackish-brown. Legs dark brow 11, 

 having the tarsi of a pale greyish-brown colour. 



Prosthesima pedestris. 



and tarsi reddish-brown ; abdomen black and very 

 hairy. This species is uncommon. 



Prosthesima petiverii Scop. [Drassus ater 



Bl.) 



Length. Male 6.3 mm., female 6.5 mm. 



Cephalo-thorax jet-black. Legs, femora black, 

 the other joints yellowish-brown. Abdomen black, 

 covered with thick hairs. This spider is found under 

 rubbish and decayed bark. 



Prosthesima pedsstris C. Koch. 



Length. Male 7.3 mm., female 7.6 mm. 



Cephalo-thorax black. Legs similar to the last 

 species. Abdomen black, much less hairy than 

 P. petiverii Scop. This spider is found in similar 

 situations to the last. 



Prosthesima nigrita Fabr. [Drassus pusillus 

 Bl.) 



Length. Male 4.2 mm., female 4.4 mm. 



Cephalo-thorax black. Legs having the meta- 



Drassus letpidicolens. 



Abdomen dull black. This spider has been found 

 in Dorset, and is very rare. 



Prosthesima longipes C. Koch. 



Length. Male 4.5 mm., female 5 mm. 



This spider is very similar to several of the fore- 

 going, but may be distinguished by the much greater 

 length of the legs. It is rare. 



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