— 65 — 
athippus morsitans Sp. N. 
BISXNVIENE5 27083 b: 
Colour (in alcohol): Carapace with a pale reddish median band running from the 
anterior row of eyes to the posterior margin; the spaces between and about the eyes on 
each side black: the rest of the carapace reddish-brown:; mandibles reddish-black: labium 
and maxillae brownish, the latter apically paler; palp testaceous, femur infuscate basally and 
tarsus infuscate throughout. Legs mostly ochraceous or testaceous, the basal half of the 
femur and tibia paler, anterior and posterior surfaces of femora of 1% and 2"4 as well as 
the patellae darker with purple metallic lustre, upper side of abdomen also with green 
metallic lustre. Reddish hairs around and between the side eyes, white hairs below them 
and between the anterior eyes. 
Cephalie region of the carapace nearly flat, but little sloped downwards anteriorly; 
the posterior eyes oniy a little hisher than the anterior laterals, their centres about on a 
level with the upper edge of the anteriors; the intermediate eyes distinetly nearer to the 
posterior than to the anterior: the centres of the anterior laterals an a level with the upper 
edge of the anterior medians; elypeus about half the radius of the anterior medians. 
Mandibles with basal segment nearly as long as the carapace with a slight sig- 
moid flexure, distally thickened, armed with 4 teeth, 2 small and basal, 2 larger and distal, 
the inferior distal tooth much shorter than the upper, which is very long, pointed, simple, 
and sligehtly eurved; fang nearly as long as the basal segment, sinuate with a small anterior 
basal tooth. 
Palp long and slender, longer than carapace (palpal organ as in figure). 
Legs long and rather slender, 3, 1, 2, and 4 (or 1, 3, 2, 4), the 32 longer on the 
left side than on the right; the tibia of the 1* a little less than the length of the 
carapace. 
Measurements in millimetres. Total length 9; length of carapace 4, width 
2.8: length of abdomen 5, width 2; length of basal segment of mandible 3.8, of palp 6, 
of 1% leg 15, of 224 leg 11, of 3-2 16 on one side, 14 on the other, of 4® leg 11; 
patella and tibia of 4" 3.7, tarsus and protarsus 4.8. 
Locality. Baram River in Borneo. A single & example. 
Apparently resembling B. macilentus Thor. from Sumatra, but certainly differs in 
having the upper distal tooth on the basal segment of the mandible simple and not double; 
from B. birmanicus it also differs in having much longer and differently armed mandibles, etc. 
Abhandl. ıl. Senckenb. naturf Ges. Bd. XXIII. 79 
