560 

 GENUS HYCTIA, Sim. 



Differs from Marpessa in being of a still narrower and more 

 elongate form. In other respects it is very closely allied to that 

 genus (according to M. Simon, Arachn. de France iii., p. 19). 

 The relative length of the genual and tibial joints of the first 

 pair of legs differs constantly in the two genera ; in Marpessa 

 these are equal, but in Hyctia the latter is one half longer than 

 the former. This last may be so in the adults (which I have not 

 seen), but it scarcely holds good in the immature state, at 

 least not to the extent mentioned above. Including Hyctia 

 xanthogramma, Bl. (of doubtful genus), two species of this genus 

 are found in Britain, but they have not yet been met with in 

 Dorsetshire. 



While the different species of Marpessa are for the most part 

 found on walls, rocks, and trunks of trees ; those of Hyctia 

 appoar to be usually found in marshy places. 



HYCTIA NIVOYI. 



Salticus nivoyi, Luc, Explor. en. Alg6rie. 



„ peomptus, Blachw., I.e., p. 59, pi. iii., fig 32. 



Length of an immature female rather less than 1 -6th of an inch. 



Cephalo-thorax tawny yellow. Ocular area black. The 

 margins are black, as aro also some converging lines on the 

 sides, and a longitudinal central one on the hinder part. Legs 

 short, rather strong, 4.1.3.2; colour pale yellowish brown, 

 sparsely marked with black. Palpi similar in colour and 

 markings to the legs. Abdomen dull yellowish, marked above 

 and on the sides with curved, transvorso, oblique rows of black 

 spots, more or less confluent. The spots on the fore part of the 

 upper side form longitudinal lines. 



Sternum yollowish, with a black marginal border. 



A single example was found near Northampton many years 



