Tetriging in the Oxford University Museum 225 
slightly beyond the wings, the apical process little upturned at the 
tip, dorsum of pronotum nearly smooth, conspersed with granules, 
little bifossulate behind the shoulders ; median carina in profile un- 
dulate, before the shoulders compresso-arcuate, and forward behind 
the anterior margin obliterated, but distinct posteriorly ; lateral 
earine of pronotum wanting: the lateral margins of pronotum just 
above the elytra at sides longitudinally sulcate ; lateral lobes with 
the posterior angles strongly produced outward on each side in a 
transverse acute spine, stout, and triangular. Elytra small and 
lanceolate ; wings largely concealed by the pronotum posteriorly. 
Anterior and middle femora rather slender, the margins entire; the 
apical denticles of posterior knees subacute, the ante-genicular den- 
ticles moderately distinct; the first articles of the posterior tarsi 
having the first pulvilli smallest and acute, the third barely longer 
than the second, subflattened below. Length of body entire, female, 
15 mm, ; pronotum 14°5 mm. ; posterior femora 7 mm. 
One example from (Kuching?) N.W. Borneo ; Sarawak 
Museum, No. 344; Oxford Museum. 
2. B. planus, sp. nov. 
Greyish fuscous, the face similarly coloured, but the legs lighter, 
the posterior femora externally light above, striated with fuscous 
below, posterior tibize fuscous. Vertex very narrow, in front barely 
more than half the width of one of the globose eyes, ascendant forward ; 
frontal costa barely compresso-elevated between the antenne, face 
oblique, scarcely sinuate. Pronotum anteriorly cylindrical, the pro- 
zonal caring very indistinctly indicated, posteriorly subulate and 
extended little beyond the knees of the hind femora ; the dorsum 
interspersed with coarse granulations, subpunctate posteriorly, 
between the shoulders bearing indistinct, abbreviated, secondary 
costa ; median carina subincrassate, but low, obliterated behind the 
anterior border, posteriorly straight, but little compresso-arcuate 
forward before the shoulders ; lateral lobes with the posterior angles 
on each side bearing a transverse spine, strongly narrowed acute. 
Elytra small, lanceolate, and black ; wings fully explicate but ex- 
tended only as far backward as apex of pronotal process, coloured 
black or fuscous. Anterior and middle femora elongate, narrow, 
margins entire ; posterior femora externally bearing strongly ex- 
pressed oblique costz ; the first and second pulvilli of posterior 
tarsi equal in length, acute, the third longer and flattened below. 
Length of body entire, female, 12 mm. ; pronotum 11 mm. ; posterior 
femora 5°7 mm. 
One example from Mt. Matang, 3000 feet, near Kuching, 
N.W. Borneo ; Sarawak Museum,No. 342; Oxford Museum. 
