British Oribatidx. Bij A. D. Michael. 243 



rounded elevation before reaching the first pair of legs. These are 

 set in deep clefts of the sternum, open above, and open, but to a less 

 extent, below. Between the second and third pairs of legs, is a 

 long, chitinous projection of the sternum, bifid at the end. Stig- 

 matic hairs medium length, slightly spatulate at the ends, where 

 they are roughened with small points ; cephalothorax and tectum 

 covered with evenly-scattered, rough, elevated spots ; wings of 

 tectum reticulated with small raised ridges ; all joints of the legs, 

 except the tarsi, thick, rather flattened, broadest anteriorly, and 

 rough with sinuous ridges. No hairs on the vertex, two short ones 

 at the point of the rostrum, one or two on each of the first four 

 joints of each leg, and numerous ones on the tarsus. Dorsal plate 

 of the abdomen a long oval, rounded posteriorly, with a waved edge 

 prolonged anteriorly over part of the cephalothorax, and ending in 

 a sharp point soklered to the tectum ; edges of the plate slightly 

 projecting in front, a narrow transverse ridge near the anterior 

 point, from the ends of which ridge other ridges start, nearly at 

 right-angles, and then curve out to the before-named projecting 

 ridges : in the centre of the space between these ridges is a light- 

 coloured depressed, oblong marking with rounded corners. This looks 

 clear, and, when the dorsal plate is removed and looked at from the 

 inside, it is seen to be due to the chitine being absent, or extremely 

 thin, there seeming to be a membrane only. Dorsal plate thickly 

 dotted round the edges, but with much larger elevated markings, 

 having the appearance of rings by transmitted light, towards the 

 centre ; four small spatulate hairs at the anal margin, and two lines 

 of four or five similar ones down the back. Whole under surface 

 strongly spotted ; anal plates large, raised, and pentagonal ; vulval 

 plates nearly square. 



GENUS EREMiEUS. 



22. Eeem^us oblongus. Koch. 

 Koch, fasc. 3, pi. 24. 

 Nic. 451. 

 Found everywhere ; common. 



23. Erem^us Cymba. Nic. 

 Nic. 452. 

 Found at Epping Forest, and near Tamworth. Rare. 



GENUS NOTHRUS. 



24. NOTHRUS SPINIGER. Koch. 



Koch, fasc. 2, pi. 18, 

 Nic. 455. 

 Found by Mr. George at Kirton Lindsey, and by me at Epping 

 Forest. 



R 2 



