I860.] Indian Arachnoidea. 219 



yellowish with a brown, partially interrupted streak near the margin, 

 opposite the thickened coxse of each of the three first pair of feet. All 

 these are remarkably slender, and as regards proportioned length rather 

 different from those usually met with in other species of Dolomedes. 

 The first pair is by far the longest, the 2nd and 4th are subequal, and 

 the third is a little longer than one half of the 4th. 



The abdomen is sub-cylindrical, about half as long again as the 

 thorax, but narrow, truncate, and slightly covering the base of the 

 former with its anterior edge which is provided with a number of stiff 

 short hairs. The centre is occupied by a brown streak attenuating pos- 

 teriorly into a point ; the remaining portion of the upper surface has also 

 a brownish tinge but there are numerous greenish white shining dots on 

 it ; the sides possess a few darker oblique transverse blotches and are 

 bounded above by an undulating whitish margin ; below, the surface 

 is pale yellowish brown with two narrow, whitish, somewhat raised 

 lines, beginning at the sexual opening and converging towards the 

 spinners which are terminal. 

 Length of cephalothorax 4 m.m. ; its width in the middle 4 m.m. 



abdomen 7 „ „; 3 ,, „ 



one foot of the 1st pair 85 m.m. 



2nd 25 „ „ 



3rd 15 „ „ 



4th 28 „ „ 



This is a very peculiar species of Dolomedes ; it entirely agrees with 

 this genus in the disposition of the eyes, the general form of the body, 

 the length of the falces, the form of the lip and rnaxilke &c, all 

 characters upon which genera of Arachnoids are almost solely based ; 

 but the feet are those of a Nephila, very slender, the first pair being 

 the longest, while in Dolomedes the fourth is usually the longest, or 

 at least sub-equal to the first. The shortness of the feet of the 3rd 

 pair is also remarkable, but as there are several species of Dolomedes 

 known with equally long feet, I rather prefer placing the species in 

 this genus than proposing a new one, especially as I am at present 

 only in possession of a single specimen. 



Loc. Neighbourhood of Calcutta, apparently a very rare form ; I 

 obtained it a few years ago in the botanic garden on the leaf of a tree, 

 but never met again with a second specimen. 



