THE CANADIAN ENTOMOLOGIST. 319 



spur cultrate, solid, convex on inner surface, a small apical tooth 

 but no teeth on hind margin. Tegmina narrowly rounded at apex, 

 media straight, not bent to touch radia, radial cross-vein present, 

 first median sector bent, touching cubitus. 



This genus comes next to Sa^otopsis, but differs in having the 

 first segment of antennae flattened and triangular. If we disregard 

 the nature of the spur it comes near Perkinsiella and Sago opsis 

 near Sparnia. 



Type — B. albolineatus. 



Bambucibatus albolineatus, sp. n. 



cf Light brown, ventral surface and legs lighter, dorsum of 

 abdomen darker. A white or light yellow median line from apex 

 of vertex to end of mesonotum, bordered on each side with dark 

 brown or black; antennae darker brown. Tegmina brown with 

 colourless patches, a large colourless patch in middle of costal cell, 

 a large one at end of clavus extending to media, three from end of 

 costal cell to second median sector, a small one at end of radia; 

 wings hyaline with brown veins. Pygophor laterally compressed, 

 long on ventral surface shortening to the very short dorsal surface, 

 two small spines on medio-v^entral edge; anal segment short, 

 tubular, anus in apex; styles very short and narrow, widest at base^ 

 slender in middle and narrowly spatulate at apex. 



9 Anal segment very short, tubular, anus in apex, anal 

 style spatulate, short, broad. 



Length 2.5 mm.; tegmen 3 mm. 



Hab. — Singapore, under the leaf-sheaths of bamboo. (Muir, 

 February.) 



Several specimens contain Stylops puparia. 



Arcofacies, gen. no v. 



Vertex at base broader than length, apex narrower than base, 

 truncate with outline broken by facial carina, lateral edges distinctly 

 keeled, no medio-longitudinal carina or exceedingly faint; length 

 of face more than twice the breadth, sides very slightly arcuate, 

 tricarinate, carina deep, especially the median carina at apex; in pro- 

 file vertex and face at right angles; clypeus strongly curved, at 

 right angles to face, tricarinate; diagonal carina on gena distinct. 



