WATER FROM HOLLOWS ON TREE TRUNKS. 435 



First antennae (fig. 2) rather short and seven-jointed, with the 

 olfactory seta, on the fourth joint reaching only to about the 

 middle of the last joint. Second antennae of the usual type 

 with the accessory branch (fig. 3) very small, one-jointed, bearing 

 three setae at the tip. First pair of feet (fig. 4) small, with 

 three-jointed outer and two-jointed inner branches. Inner 

 branch not quite so long as outer, with one of the two terminal 

 setae extremely long and curved at the tip. Second, third, and 

 fourth pairs of feet (fig. 6) very similar to one another with the 

 three-jointed outer branches larger than in the feet of the first 

 pair, but with the two-jointed inner branches smaller, being only 

 a little longer than the basal joints of the outer branches. The 

 second joints of the inner branches of the second and third pairs 

 of feet carry three terminal spines, the corresponding joint of the 

 fourth pair only two. Fifth feet (fig. 8) consisting of two joints, 

 the basal being extended on the inner side considerably beyond 

 the broadly ovate second joint. Inner part of basal joint armed 

 with six spines somewhat flattened, with rounded tips of the 

 type found in M. brevipes Sars, but not quite so broad or blunt. 

 The fourth and fifth spines from the inner edge arise from a 

 little sub-rectangular projection which has the appearance of a 

 pseudo-joint. A finely pointed spine projecting outwards arises 

 as usual from the lower corner of the outer edge of the joint. 

 The second joint armed with four spines, the innermost being 

 of the same type as those on the basal joint, and the other 

 three being finely pointed and not flattened. The median of 

 these three turns outwards across the outer spine. There is a 

 little thorn on the inner edge of this joint just above the inner- 

 most spine. None of the spines on the fifth feet are plumose, 

 but a single barb usually occurs on the fifth and sixth from 

 the inner edge, as indicated in fig. 8. Earlier stages of the fifth 

 feet are shown in figs. 10 and 11. 



Eeceptaculum seminis (fig. 18), lying immediately behind and 

 usually covered by the fifth feet, somewhat complicated in 

 structure, consisting apparently of two lateral highly chitinised 

 convoluted chambers or tubes and a median membranous or 

 muscular cavity, the latter sometimes rhythmically contracted 

 and expanded by two lateral muscles, thus forming for a time 

 a kind of pulsating organ. 



Chitinous integument of body and furca almost everywhere 



