BY ARTHUR M. LEA. 203^ 



mesosternum. Anteruue sleiidei" scape inserted distinctly nearer 

 apex than base of rostrum, the length of funicle; two basal joints 

 of funicle elongate; club subelliptic, of moderate size. Prothorax 

 transverse, convex, subcylindrical, slightly narrowed and scarcely 

 produced in front; base truncate, ocular lobes rounded and almost 

 level with apex, Scutellum small, somewhat rounded. Elytra 

 moderately convex, considerably wider than and about thrice the 

 length of prothorax, shoulders and apex rounded. Pectoral cxtnal 

 wide in front of anterior coxse, these slightly excavated above 

 and but feebly separated. Mesosternal plate transverse, depressed, 

 scarcely concave, apex about twice the width of base. Meta- 

 utermmi large, slightly longer than basal segment of abdomen; 

 episterna distinct. Abdomen moderately large, sutures distinct 

 except that of 1st and 2nd, which is rather feeble across the 

 middle; two basal segments moderately large, the 1st not much 

 longer than 2nd, incurved to middle of apex, intercoxal process 

 rounded and not very wide; intermediates large, flat, level with 

 the other segments and together longer than 2nd or apical. Legs 

 rather long; femora stout, clavate, not grooved, strongly dentate, 

 posterior not extending to apex of abdomen; tibiee thin and rather 

 long, distinctly bisinuate beneath, terminal hook very acute: tarsi 

 rather thin, 3rd joint not much wider than long, deeply bilobed, 

 claw-joint long and thin, strongly exserted; claws small, widely 

 separated. Subovate, feebly convex, punctate, winged. 



The large and very prominent eyes at once distinguish this 

 genus from Melanterhis; and the scrobes and the sculpture of 

 the elytra are different from those of most of its allies. The 

 tibiae are thin and resemble those of Ilyhojjhorus. 



Arthriticosoma vigilans, n.sp. 



Red, shining ; elytra somewhat paler than prothorax, but in 

 places tinged with black, the two colours sharply defined. Under 

 surface black, the sides in places feebly diluted with red. Legs 

 and antennfe somewhat paler than rostrum. Sparsely clothed all 

 over with small ochreous scales. 



