54 
STUDIES OF TETRIGINiE (aCRYDIIN.®) . 
direction only slightly oblique, strongly produced beyond 
the head, margin above straight, viewed from above 
strongly narrowed forward, acute compressed, the apex 
rounded, sides indistinctly concave; prozonal carinae for¬ 
ward on the dorsum indistinctly indicated ; median carina 
of pronotum compressed, nearly horizontal from the 
thoracic sulci forward to the hind pronotal apex; dorsum 
longitudinally fossulate behind the disc on each side, 
posterior process lengthily produced beyond the hind 
femoral knees; lateral lobes acute ungulate, distinctly 
produced; inferior sinus very widely obtuse-angulate ; 
elytra subovate, apices rounded, impressed with black, and 
surrounded with pale elevated line, below becoming cras- 
sate apically and lighter coloured ; wings extended beyond 
the pronotal apex nearly one millimeter. Subgenital plate 
below the female ovipositor trilobate, the middle lobe 
convex. 
Female.—Length of pronotum 20 mm.; posterior femora 
7*5 mm.; frontal cornu 3 mm. 
One example, Lawas, Sept. 1909. Sarawak Museum. 
