183 



moderately slender appearance, depressed and with almost parallel sides. The tcr- 

 gites, which are not longitudinally divided, increase in length towards the tenth, 

 and at least the median ones have their lateral halves slanting towards the sides, 

 thus establishing a median longitudinal keel. The tergites are minutely reticulate 

 or striate and the median ones bear in front of marginal row six hairs, placed in 

 wide lighter spots: the tip of the abdomen seems to possess tactile hairs. The ster- 

 nites have a fairly distinct longitudinal line and the genital area arc like that of 

 Ch. Birmanicus Thor. (cf. p. 124). 



Antennae (PI. IV, fig. 6 a). — The flagellum consists of 3 (?) hairs, of which 

 the anterior has a few long teeth; the lamina interior possesses three dentated lobes 

 and a long serrated spine; the serrnla exterior has the basal of the 24 teeth IJie 

 longest and provided with an almost triangular terminal llap (fig. 6 a). The 

 galea'} 



Maxillae. — The maxillae are only minutely granular laterally, but smooth 

 everywhere else. 



Palps (PI. IV, fig. 6b; fig. 17). — The palps, which are distinctly longer 

 than the body, are distinctly granular, with moderately big and pronounced gra- 

 nules. The anterior surface of the trochanter, the stalks and 

 the fingers are smooth or almost smooth. The shape as well as 

 the arrangement of the different kinds of hairs will probably 

 not show any marked dissimilarity to those described in C/j. 

 Birmanicus Thor. (cf. p. 177). The trochanter, which has a short 

 and well defined stalk, is 16 longer than broad and distinctly 

 narrower than the femur; its anterior margin is beyond the 

 stalk moderately and evenly convex, while the posterior has 

 beyond the stalk a very abrupt and rounded projection in the 

 proximal half just beyond the stalk; the dorsal surface of the 

 trochanter is produced into an upwards and slightly backwards 

 directed pyramidal tubercle, which, when observed from the 

 front, is obtusely pointed and has the proximal slope distinctly 

 and evenly concave, while the distal is almost obtuse-angled; 

 the trochanter is, measured from tip of tubercle, distinctly 

 (1-2) deeper than broad. The femur, which has a short and well marked stalk, is 

 21 longer than broad, as long as the tibia but distinctly narrower; the anterior 

 margin is beyond the stalk moderately convex and then concave; the posterior, 

 but especially the dorsal surface is very abruptly convex just beyond the stalk 

 and then moderately so. The tibia, which is three times as long as its well defined 

 stalk, is 18 longer than broad; the anterior outline is beyond the deep notch 

 almost circular; the posterior surface is beyond the basal elevation, which is short, 

 prominent and as well defined distally as proximall}', distinctly convex, almost 

 circular; the dorsal and the ventral outlines are also strongly convex in a similar 

 way as in Ch. monitor n. sp. (cf. pi. IV, fig. ö b). The hand, which is of almo.st 



Fig. 17. C/i. Nicoba- 



rensis n. sp. ; c?; left 



troclianter; x 48. 



