l8 Studies on Arthropoda. I. 



Flagellum (figs, i f and i g) uncommonly small, a little more 

 than twice as long as broad, but almost three times as long as 

 deep, consequently its thickened part considerably depressed. 

 The stalk only a little deeper than broad, seen from above (fig. 

 i f) scarcely one-third as long as the main piece, which is oblong- 

 ovate, not quite half as long again as broad, with the lateral 

 margins moderately convex and the end very obtuse, rounded. 

 Seen from the side (fig. i g) the lower margin of the flagellum 

 has its shorter proximal part feebly concave and the remain- 

 der somewhat convex; the upper margin has the proximal 

 half somewhat sinuate, the distal somewhat concave and nearly 

 angularly bent at the middle. Several of the spiniform setae 

 lost in the single specimen; the upper surface has beyond the 

 middle a pair of setae and more proximally a seta in the median 

 line. 



Colour nearly as in T. parvus, though a little more 

 brownish. 



Length of the body 3.15 mm., palps 1.4 mm., first leg. 3.5 

 mm., fourth leg 3.0 mm. 



Female. 



Similar to the male in most respects; the sexual differences 

 are less numerous than in most species. 



Palps (figs, i d) differ feebly from those in the male. Tro- 

 chanter has the lower distal corner rounded and not angular, 

 but the angle measures as in the male about 110. 



First pair of legs (fig. i c) as long as the body. The coxae 

 terminate distinctly longer from the outer angle of the mandibles 

 than in the male. Foot slightly longer than tibia, differing 

 from that in the male in having the terminal joint proportio- 

 nately a little longer (fig. 4 a), somewhat longer than fifth and 

 fourth joints combined, and considerably more than half as 

 long as the whole metatarsus. 



