338 Mr. F. O. P. Cambridge on the 
I have no doubt that Z. valvularis, van Hass., is congeneric 
with pulvinatus and trabifer ; an example of the latter, identi- 
fied (not the type) by Dr. Thorell e coll. E. W. Oates, being 
now before me. So similar is albofasciatus to pulvinatus and 
valvularis (according to the descriptions) that even the four 
rows of ventral white spots are common to these forms. 
Species described under Leptoctenus, L. K. 
1882, Leptoctenus valvularis, van Hass. 9, 13mm. IV. 
3de Aflev. Naturlijke Historie, pt. 1l a, p. 45, pl. v. 
fig. 12 (Leiden). Sumatra (Pick van Korintzi & Sir A. 
van Hasselt). Type in coll. Bijks Nat. Hist. Mus. 
Leiden. 92, Pl. IV. fig. 16 (after van Hasselt). 
9. Tot. Jen. 13, carap. 6, abd. 7 mm. Tibi 2.2.252 
spines and 2 apical spines. ‘“ Abdominus nigro-fuscus, in 
ventris medio paullo leetior absque pictura evidente, quamquam 
vestigia obscura serierum lateralium punctorum et striarum 
oblique transversarum (Lycostformium) sub lente apparent.” 
The general character is evidently similar to that of Thorellit 
and to another form before me from Japan, but is quite distinct 
from the former, judging by van Hasselt’s figure (see PI. IV. 
fiz. 16 for reproduction), and also, so far as one can judge 
without comparing the types, from the latter. 
1884. Leptoctenus denticulatus, Sim. @, 85 mm. Ann. 
Mus. Genov. xx. p. 855. Burmah. 
Leptoctenus denticulatus (Sim.), Thor. ¢ ?. Hab. Burmah 
(coll, W. Oates). Examples in coll. Brit. Mus. Nat. 
Hist. 
gd .—Structure. Carapace horizontal, not gibbous behind, 
but still slightly raised and convex ; abruptly inclined to base. 
Eyes closely grouped ; 2nd row straight by centres. Posterior 
centrals one third larger than anterior centrals, half a diameter 
apart, distant from anterior laterals one half a diameter of 
latter. Ocular quadrangle broader than long, much narrower 
in front. Posterior centrals one third larger (by diameters) 
than anterior centrals; the latter one quarter of a diameter 
apart, one half from anterior margin of clypeus. Tibie i. and ii. 
with 2—2—2—2—2 long spines beneath; no apical pair ; 
1 basal spine on inner side, 1—1 dorsal, 1—1 on outer side. 
Protarsi i. and ii. with 2.2.2 long spines beneath, 1—1 
spines on inner side, and 1—l1 on outer side; no dorsal 
spines, Patella i., il., ill., iv. with 1 spine on each side. 
Pedipalp, see Pl. IV. figs. 4, 5, 6. 
9 .—Structure. Similar to that of male, but carapace hori- 
zontal. ‘Tibi i. and ii. with no lateral or dorsal spines, 
