472 DR. F. LEUTHNER ON THE ODONTOLABINI. 
Mandibles. 
All the males of this species which I have seen were priodont, except a single 
specimen in Herr van Lansberge’s collection, which has a small gap between the teeth 
on each side, and thus becomes an amphiodont form, with six apical teeth and two 
united obtuse basal teeth. The spine behind the eyes is much broader, and horizontal 
as in O. castelnaudi. 
Female. Uniform pitchy black. Head slightly convex, resembling 0. castelnaudi ( 2 ); 
clypeus straight ; canthus moderately developed, narrower than the eye; prothorax very 
like that of 0. castelnaudi (2) in form, narrower in front, but as broad as the elytra, 
flatter, front edge deeply emarginate on the sides; sides slightly curved as far as the 
central angle, which is not pointed, behind this very slightly emarginate ; hind margin 
slightly waved. Elytra broadly oval, very convex, dark nut-brown, shining, very finely 
punctured with a broad black suffused central band, ceasing before the tip, resembling 
O. gazella (2). Mandibles with three or four teeth on the inside. Under-surface 
pitchy black. Mentum with coarse granular punctuation, the sides raised. Prosternal 
process flattened. Front tibie slightly curved, with five or six spines above the terminal 
fork; hind tibize somewhat curved, as in O. gazella. 
Number of specimens examined: twenty-two males and nine females, in all the 
principal collections. 
Habitat. Malacca, Prince of Wales’s Island, Sumatra, Banka, Borneo. 
The male and female from Banka in Herr van Lansberge’s collection are smaller 
than the others (figs. 3 & 4). Male 50-45 millim., female 36 millim.; but there were 
too few specimens to enable me to ascertain whether this difference in size is constant 
in specimens from that locality. 
Measurements. 
Total length. Head. Mandibles. Prothorax. Elytra. 
millim, millim. millim. millim. millim, 
: 72 12 by 25 16 13'5 by 28 33:0 by 28 
. Lansberge’s coll. (Sumatra)..{ 
5 cee arauseagiary Be { 58 10,195 12 115 ,, 24 29-0 ,, 24 
Og See ey oy ROE sRee Lies 50 8,, 14 7 11-0 ,, 22 27-0 ,, 23 
40 Tag AL 5 10:0 ,, 18 24-0 ,, 20 
Banka tcp dnck oteacnemcme 36 6 ,, 105 45 9-0 ,, 16 21:5 ,, 17-5 
27. ODONTOLABIS FRATELLUS, sp. n. (Plate XCVI. fig. 5,4; fig. 6, 2, imexact.) 
Male very like 0. latipennis, but smaller. Female much more unlike than the male. 
Male. Mandibles, head, and prothorax flattened, finely punctured, dull, elytra 
shining. Head as in 0. latipennis, but broader behind. Prothorax differing from 
small specimens of the latter; the sides not so prominent, with the front angles acute, 
then convex to the central spine, then sloping obliquely backwards to the waved hind 
