354 



nearly straight or lightly lobulate, the posterior angles becoming gra- 

 dually more and more produced and from about the 14 th spiniform. 

 The pores situated close to the lateral margin. The keel-bearing portion 

 above closely granular throughout, with a row of larger granules along 

 the hinder border and at the posterior end of the body with three 

 rows of larger granules. Caudal process ovate or parabolic and not 

 quadrate; its margin sublobate. The sternal surfaces but little exca- 

 vated, with a sharp tubercle at the base of the legs. 



Copulatory foot with the inferior and internal terminal process the 

 longer, curving outwards and upwards, the superior and external 

 process much smaller and curving inwards and backwards. 



Length 42 mm.; width of 10 th segm. 6.2; width of 1 st 4.5, length 

 of l»t 2.2. 



49. Platyrhachus verrucosus, sp. n. PL XIX, fig. 20 — 20 b . 



Sumatra: Muka-Muka near Manindjau. 



9 Colour a uniform brownish ochraceous throughout. 



Head and antennœ normal. 



First tergite lightly convex from side to side, the anterior and 

 posterior borders straight in the middle, convex at the sides, the 

 two meeting in the lateral angle which represents the keel, marked 

 with an anterior row of smooth tubercles; a little wider than the head. 

 Keels of the 2 nd , 3 rd and 4 th directed obliquely forwards and down- 

 wards; the rest of the keels rising above the middle of the side, 

 sloped downwards, following the curve of the back; those of the 5 th 

 somite directed slightly forwards, from the 6 th to the 10 th projecting 

 at right angles, from the 11 th to the end becoming directed gradually 

 more and more backwards , the anterior and posterior borders of each 

 almost straight, with their angles sharply defined; the lateral border 

 furnished with four or five distinct, smooth, rounded tubercles, the 

 anterior and posterior being situated respectively on the anterior and 

 posterior angles , the posterior of the two sometimes spiniform behind. 

 The dorsal surface closely covered with low, smooth granules and 

 furnished with three distinct transverse rows of rounded, low tuber- 

 cles, these tubercles being obsolete or nearly so in the middle of 

 the back. The pore situated close to the lateral border. The caudal 

 process convex from side to side , obsoletely lobate. The lateral surface 

 granular. 



