East-Indian Chilopoda and Diplopod:. 63 
immovable finger being large and heavy, the movable one 
equalling it in length, but more slender and biarticulate, 
the distal article very short, continuing evenly the lines 
of the basal segment. 
Length of male about 45 mm. ; width 24 mm. 
Locality— Borneo : Sarawak, Ladong (H. W. Smith). 
Type, Mus. Comp. Zool. (No. 4708). 
SPIROSTREPTOIDEA. 
Harpagophoride. 
Thyropygus complexus, sp. 0. 
Median plate of anterior gonopods low at middle, trian- 
gular. Basal piece of anterior gonopods clavately widening 
distad, produced at distomesal angle into a long acute prong. 
Posterior gonopod from the upper end of the gonoceel 
curving ectad, then proximad and again mesad; the 
expanded apical part curving forward against the mesal side 
of the base of the anterior gonopod ; just as it reaches the 
upper open end of the gonoceel, the gonopod gives rise to a 
long subcylindrieal process, which curves over against and 
crosses the distal prong of the anterior gonopod on its 
caudo-ectal side ; at the ectodorsal part of its curvature the 
gonopod presents a process in the form of an elevated plate 
or keel; at the base of the expanded apical region there 
arises on the ventral side a long, acute, black-tipped prong 
which parallels the edge of the plate, a much shorter black 
spur occupying a corresponding position on the opposite or 
dorsal edge ; the expanded end at its dorso-mesal corner 
bears about ten long slender spines. 
General colour black, the overlapped region of the 
prozonites paler, testaceous, often of an olive cast. Labral 
and lateral borders of head ferruginous. Legs and antennz 
pale ferruginous, with the first two articles darker, brownish. 
Head smooth; a sulcus present across vertex. Eyes 
nearly once and a half their long diameter apart; inner end 
angular; ocelli in six series—e. g., 18, 11, 10, 7, 7, 4. 
Antenne short, reaching caudal edge of collum. 
Collum strongly narrowed down the side, but a distinct 
lateral convex margin evident, this joining the anterior 
margin about the rounded antero-ventral corner; caudo- 
ventral corner rectangular or a little more acute. Very 
strongly margined below and up the front side to level of 
eyes. 
