616 Mr. Blackwall's Descriptions of new Species of Spiders. 



they are but little developed, complicated in structure, and of a dark 

 reddish brown colour. 



Adult males and females of this handsome spider were taken in swampy 

 ground in woods at Oakland, in May 1839. The decidedly curved form of 

 the maxillae, an approximation to which may be observed in Lycosa cam- 

 pestris, Lycosa allodroma, and some other species, has not been considered of 

 sufficient importance to require its separation from the genus Lycosa, with 

 the semi-aquatic species of which genus it is very closely allied by its general 

 organization, habits, and colours. 



Family SALTiciDiE. 



Genus Salticus, Latr. 



7. Salticus distinctus. Cephalo-thorace satm-at^ brunneo, strig^, utrinque mar- 

 ginali albida, supern^ pilis flavescenti-brunneis albisque intermixtis, striga 

 mediana alba ; mandibulis maxillis labioque triangulari acuto saturate 

 brunneis ; pedibus pallid^ rufescenti-brunneis colore saturatiore fasciatis, 

 pari 4to longissimo, dein 3tio, 2do brevissimo; palpis brevibus, basi satu- 

 rate brunneis, apice albidis ; abdoraine brunneo-rufo aibidoque tincto, 

 antic^ arcubus 2 concentricis obscuris, postic^ lineis angularibus seriatis 

 albidis, macula anali alba. 



Maris par pedum anterius tertio paulb longius; paribus Imo et 2do 

 cum femoribus 3tii 4tique saturate brunneis. 



Length of the female ^th of an inch ; length of cephalo-thorax -j^ ; breadth -j^ ; 

 breadth of abdomen -y^ ; length of a posterior leg -ys ; length of a leg of 

 the second pair \. 



Cephalo-thorax large, nearly quadrilateral, abruptly sloping in the posterior 

 region, prominent in front, projecting beyond the mandibles ; it is of a 

 very dark brown colour, with a longitudinal streak of yellowish white 

 immediately above each lateral margin ; upper part covered with yellowish 

 brown and yellowish white hairs intermixed, a short streak of the latter 

 hue occurring in the middle, behind the posterior pair of eyes. Mandi- 

 bles strong, vertical, armed with a few small teeth on the inner surface. 



