54 



Length of cf 2125 a*.; of 9 varying from 1750 to 2050^. 



Colour very dark brown. 



Male. Dorsal side covered with one shield, as in Hydrogamasus. 

 The hairs on the dorsuni are distributed as in the 9 (Fig. 1); 

 they are, however, much stronger. The hairs on the centre of the 

 back are much smaller than those of the margins. 



The most remarkable features of the ventral side (Fig. 2) are 

 the following. There are two narrow jugular shields. The genital 

 aperture is sunk in an incision of the sternal shield, a position 

 which is intermediate between the two common types. The sterni- 

 genital shield is very broad between the coxae 2 and 3, very 

 narrow between the coxae 4. It bears 8 bristles. Between the coxae 

 4 it shows two lighter spots lying side by side, and two almost 

 black chitinizations in the median line. The ventri-anal shield 

 looks as if it were simply a fusion of a distinct ventral and a 

 distinct anal one. The anterior margin of the ventral portion is in 

 the middle and on the sides elegantly curved forward. The ring 

 in which the 4 th leg fits is strongly chitinized on its hind- and 

 side-edges. The ventral portion has, like the genital shield, an 

 almost black internal chitinization in the median line. 



The epistoma is like that of the 9 (Fig. 1 and 3). 



The hypostoma resembles that of the 9 (Fig. 4). 



The chelae are stronger (Fig. 3, 5, 6), especially the movable 

 finger. The latter bears on its outer side distally a long curved 

 sporn or copulation-organ. This is directed first upward and back- 

 ward, then it is curved inward, so that both organs of each man- 

 dible meet in the median line; then they are curved downward 

 and finally forward again. Fig. 3 represents the insect's head 

 (capitulum or pseudo-capitulum) with epistoma, maxillar palps 

 and the two mandibles with their copulation-organ. Fig. 5 repre- 

 sents the left mandible as seen from the left (outer) side, and 

 Fig. 6 the right mandible seen from the left (inner) side. 



Legs. The femur of the 2nd leg (Fig. 7) bears on its ventral 

 side a thumb-like sporn; the genu and the tibia a smaller process; 

 the tarsus has a knob half-way, and a pin on its distal end. The 



