323 



Glomeris. 



24. Glomeris albicornis sp. n. 



Sumatra: Singkarah. Several specimens. 



Colour. — Tergites shining black, with pale, nearly white poste- 

 rior and lateral margins ; in the middle of the tergites the posterior 

 band is slightly thicker and in small specimens there are obscure in- 

 dications of a pale thin median band; upper part of the head fuscous 

 with a median , white band , antennae and region of the labrum 

 entirely white or testaceous , legs and under surface of body also white 

 or testaceous. 



Eyes composed of a longitudinal series of from 7 — 10 ocelli, with 

 an additional external ocellus and, in one specimen, two internal ocelli. 



Nuchal plate (1 st tergite) marked with two sub-parallel arched striae. 

 Second tergite marked laterally with from 7 — 9 striae , most of which 

 cross the vertex ; the rest of the tergites marked laterally and inferiorly 

 with two or three striae; all the tergites smooth but marked with 

 exceedingly fine close-set punctures. Anal tergite with its border very 

 lightly emarginate in the male, but not impressed, being convex 

 from above downwards and from side to side. 



The male with the 17 th pair of legs very small; 18 th pair larger 

 with coxae not coalesced; intercoxal lamina long and piriform, pro- 

 jecting as far as the distal margin of the first segment of the copu- 

 latory feet, with a slender pointed process on each side; copulatory 

 foot composed of four segments , the first, stout and cylindrical, bears 

 a single slender pointed internal process, the second segment also 

 stout and bearing a posterior stout more or less spatulate process 

 and an anterior short and slender process ; third segment stout and wide 

 and furnished posteriorly with a short blunt process; fourth (distal) 

 segment thick at the base, becoming gradually thin towards the 

 apex, and strongly curved. 



Length 10.5 mm. 



At first sight this species appears to be almost identical with Gl. 

 carnifex var. pallida from Mergui l ) ; but the two differ in some points 



1) Pocock: Journ. Linn. Soc. Zool. XXI, p. 290, pi. 24, fig. 7. — The copulatory 

 feet of this species were wrongly described as being composed of five segments. In 

 reality there are but four as in this species. What I mistook for the first segment 

 proves to be merely membranous and not chitinous. 



