NOTHRUS THELEPEOOTUS. 521 



with a broad raised band along each side ; the median 

 portion of the notogaster being depressed. The pro- 

 gaster is almost straight, the lateral margins are not 

 so parallel as in the adult, the central portion of the 

 abdomen being decidedly the widest, but still the 

 departm^e from the parallelogram is not very great. 

 The abdomen is strongly bifurcate posteriorly, ending 

 in two long conical tails which form about one-fourth 

 of the length of the entire abdomen ; each tail ends in 

 a long, slightly- spatulate hair curved inward. These 

 tails are directed backward and slightly upward, so 

 that their distal ends are the highest portions of the 

 creature ; just inside them, on the hind margin, are 

 two smaller hairs curving outward, there are six thick 

 hairs on the progaster springing from papillae in fully- 

 grown specimens, and a few hairs on the lateral mar- 

 gin (these hairs are not shown in the drawing). 



Distribution.— The adult and nymph are chiefly 

 found at the roots of mosses (on the ground). I have 

 found them more on the Yorkshire and Cumberland 

 hills than anywhere else, but have had a few from 

 Epping Forest, Axe Edge (Staffordshire), and else- 

 where. The species is not very common ; it has been 

 recorded in Switzerland, Germany, and Italy, and I 

 have found it in Norway. 



NoTHRUS THELEPROCTUS* (Herm.). PI. XLY, figs. 1 — 9 ; 



PI. A, fig. 10 ; PI. B, figs. 

 3, 4, 7, 10, 12, 14, 16, 20, 

 22,24, 26; PL C, figs. 8, 

 9, 10; PI. D, figs. 1, 11, 

 12, 15; PI. E, fig. 3; 

 PI. F, figs. 4, 8, 9, 14. 



Notaspis theleproctus, Herm. P. 91, pi. vii, fig. 5. 

 Liodes — Heyden. Isis, 1828. 



Nothrtis — Koch. Heft 29, fig. 10. 



* 6»A»/, a teat ; npuKToc, anus. 



