188 
PACIFIC SCIENCE, Vol. XII, July, 1958 
27. Ninth sternum with a pair of closely 
placed lobes at middle of hind margin, 
separated by a narrow V-shaped cleft. 
Posterior lateral margins of sternum not 
lobate 28 
If ninth sternum has median or sub- 
median lobes on hind margin they are 
well spaced by a broad U-shaped cleft. 
Posterior lateral margins strongly lobate. 
29 
28. Median lobes of sternum very strong, 
claspers not visible from a ventral view 
(Fig. 2d). Ninth tergum with abroad U- 
shaped cleft (Fig. 2c). (Aru Islands) . . . 
aruensis Edwards 
Median lobes comparatively small, clasp- 
ers extending strongly beyond hind mar- 
gin of sternum (Fig. 3 a). Ninth tergum 
with a narrow V-shaped cleft (Fig. 3 b)i 
(Philippine Islands) . . . . bakeri Malloch 
29. Claspers tiny, inconspicuous, and partly 
or completely fused with ninth sternum. 
Median portion of hind margin of ninth 
sternum produced into a broad heavily 
sclerotized capitate projection, either 
truncate at apex or terminating in a pair 
of blunt lobes and extending beyond 
apices of lateral lobes of sternum. . . 30 
Claspers well developed, distinctly artic- 
ulated with the sternum. No such de- 
velopment of a median lobe 31 
30. Median process of sternum truncate at 
apex. (Philippine Islands) 
Zamboanga Hardy 
Median process developed into a pair of 
blunt lobes at apex (Fig. l$b). (Sumatra, 
Philippine Islands) 
fulvicollis (Fabricius) 
31. Ninth sternum with a median moundlike 
lobe on hind margin 32 
No median lobe on sternum 33 
32. Lobes on posterior lateral margins of 
ninth sternum rounded at apices, sepa- 
rated at bases by the width of the lobe at 
this point. No submedian lobes on ster- 
num. Claspers truncate, pointed at outer 
apices (Fig. 2\d). (Australia) 
. ornaticornis Skuse 
Lateral lobes rather slender pointed, 
widely spaced, separated by four times 
their width at base; a pair of small sub- 
median lobes present on hind margin. 
Claspers rounded at apices (Fig. 23). 
(Kei Island, Indonesia) 
ruficornis Edwards 
33. Lateral lobes of sternum slender and 
elongate, extending about two times the 
length of claspers and more than two 
times longer than the submedian lobes 
on hind margin 34 
Lateral lobes tapered to a point, extend- 
ing scarcely beyond apices of claspers 
and submedian lobes. (Indonesia) 
sundaensis Hardy 
34. Ninth sternum extending well beyond 
apices of tergum, so tergum is not 
plainly visible from direct ventral view. 
The submedian lobes of sternum rounded. 
Cleft in middle of hind margin of tergum 
narrow, about one-sixth the width of ter- 
gum and extending only two-thirds the 
length of segment on the middle line; 
the lobes of the tergum are rather quad- 
rate. (Siam) siamensis Hardy 
Ninth tergum extending almost to apices 
of sternum. Submedian lobes of sternum 
with a subapical point on outer side 
(Fig. 25 b). Cleft of tergum broadly V- 
shaped about one-third as wide as ter- 
gum and nearly bisecting segment (Fig. 
25^). (Indonesia) . . . subvarians Walker 
35. Posterior margin of ninth sternum with a 
pair of elongate submedian rodlike lobes 
. 36 
No such rod-shaped lobes 37 
