462 BRITISH ORIBATID.?!]. 



Hebmannia bistriata* (Nic). PL XLII, figs. 8 — 14. 



Nothrus bistriatus, Nic. P. 457. 



Hermannia bistriata, Michael. Journ. Roy. Microsc. Soc, ser. i, 



vol. iii, p. 11. 

 Nothrus palliatus, Koch. Heft 29, fig. 21. Nymph. 

 — cirrosus, Can. e Fan., p. 24. Nymph. 



Average length about '85 mm. 



Average breadth about '40 mm. 



Average length of legs (first pair) about '33 mm. 



Average length of legs (second pair) about '26 mm. 



Average length of legs (third pair) about '28 mm. 



Average length of legs (fourth pair) about '42 mm. 



This is a handsome and well-marked species ; it is 

 not a typical Hermannia, but is one of those forms 

 which approaches to the genus Nothrus, indeed, its 

 resemblance to N. Targionii is striking. It is particu- 

 larly interesting from the fact of its nymph being 

 practically amphibious. It is probably not the Nothrus 

 bistriatus of Koch, although Nicolet supposed that it 

 was ; Nicolet also fell into another error with regard 

 to it ; he states it to be an immature form of N palustris, 

 which is certainly incorrect, it is mature and quite a 

 distinct species ; although Nicolet says that he saw N. 

 jpatustris emerge from it, he has made a mistake of 

 some sort. 



Colour dark chestnut-brown or black ; legs lighter 

 brown. 



Texture of cephalothorax rough, and deeply pitted ; 

 of abdomen almost smooth (between the ridges) but 

 not polished. Legs rough. 



Form an elongated pyriform, somewhat truncated 

 posteriorly. 



Cephalothorax rather large and wide ; a good deal 

 arched. Rostrum rounded with a small median blunt 

 point. Behind the rostrum the cephalothorax widens, 

 with a small, rounded shoulder on each side ; then its 



* Bis, twice ; striatus, furrowed, grooved. 



