350 



GENUS PIRATA, Sund. LYOOSA, Blachw., in part., and 



PIE ATA, Cambr., in part. 



The cephalo-thorax is long, moderately constricted at the 

 lower margjns of the caput, which is broad and truncated at ita 

 fore extremity below, but rather narrow and rounded above ; its 

 hairy clothing is slight, and the *facies is nearly vertical. 



The first and second rows of eyes are of equal length, the 

 former being very small, of equal size, and separated from the 

 lower margin of the clypeus by no more, or evon less, than a 

 diameter of one of its central eyes. The eyes of the second row 

 are the largest of the eight, divided from each other by 

 nearly about a diameter's space, and forming with those of the 

 third (or posterior) row, a quadrangle much broader behind than 

 in front. The length of the line formed by tho lateral eyes of the 

 second and third rows, on each side, is equal to that of the 

 second row. The eyes of the third row are considerably larger 

 than those of the first. 



The legs are long and tolerably strong. The spines are rather 

 slender, and there is no scopula beneath tho tarsi. 



The spinners of the superior pair are distinctly, but not greatly i 

 longer than those of the inferior. M. Simon states them to be 

 two-jointed; but it appears to me that he reckons as a joint 

 the small fixed basal prominence to which the spinner is articu- 

 lated. 



The spiders of this genus are, like Dolomedes, semi-aquatic. 

 They are usually of small or moderate size, and are all conspicu- 

 ous from the two longitudinal rows of shining white dots, and 

 often similarly coloured borderings, with which the abdomen is 

 ornamented. 



Five species have been recorded as British, four having been 

 found in Dorsetshire. 



* The facies is the front portion of the caput between ita upper anterior 

 margin and the falces. 



