DACTYLOPUS. 117 



second joints are exceptionally long and are pectinate 

 on the outer margin; the last joint bears at its ex- 

 tremity five geniculated setae ; first joint of the inner 

 branch robust, giving origin near the middle of the 

 inner margin to a very long plumose seta; second 

 and third joints equal, about as long as broad, the 

 second bearing two slender terminal setae. In the 

 male the first joint is excessively broad (fig. 6), and 

 just within its point of attachment is a stout lobe (fig. 

 6 a) with a curved spine and two or three small hairs. 

 The inner branches of the following pairs of feet are 

 considerably shorter than the outer. The fifth pair is 

 of moderate size, the basal joint short and broad (fig. 

 8), its internal segment not much produced, fringed 

 with a few short hairs and five setae of moderate length ; 

 the second or outer joint is small, about as long as 

 broad, and is also provided with five seta3. In the 

 male the basal joint is less developed (fig. 9) and has 

 only two setae, but the second joint is larger, more 

 angular, and bears five strong spine-like setae on the 

 outer, and one of more slender build on the inner 

 margin. The tail segments in the female (fig. 10) are 

 rather longer than broad, bearing three setae, the inner- 

 most of which is the longest, but scarcely equals the 

 length of the abdomen ; in the male (fig. 11) the last 

 abdominal ring is also partially divided, forming a 

 portion of the caudal fork ; the tail setae are consider- 

 ably dilated towards the base, and the inner angle of 

 the caudal segment gives attachment to a narrow 

 lancet-shaped spine (fig. 11 a). Colour yellowish 

 brown. Length -^nd of an inch ('6 mm.). 



