1896.] of the Coleoj^tera of South Africa. 289 



Gen. OETHOGONIUS, Dej., 

 Spec. Col., i., p. 279. 



Ligula very narrow, nearly truncate at the tip, with one long seta 

 on each side of it ; paraglossae three times as broad as the ligula, 

 expanding from base to apex, almost fan shape, a little longer than 

 the ligula but fused with it, and having on each outer angle a small 

 fascicle of short hairs ; mandibles projecting, incurved at the tip, 

 the right one with a median inner tooth ; antennae moderately long, 

 with the joints a little compressed, and with a very narrow median 

 groove on each side, the three first joints and the basal part of the 

 fourth smooth, the others pubescent ; labrum as long as broad, trun- 

 cate at apex, and with two deep setigerous punctures and a lesser 

 one on each side ; prothorax transverse, with the outer margins 

 recurved, the basal one sinuate ; elytra elongato-quadrate, depressed, 

 rounded subdiagonally behind ; femora thickened ; tibiae with four 

 grooves edged by a duplicate series of short spines ; tarsi mode- 

 rately long, triangular, the basal one narrower than the second, the 

 fourth one either slightly incised or lobate ; anterior and tarsi of the 

 male squamigerous and lamellate underneath ; claws moderately 

 long, pectinate. 



Orthogo7iius is met with in Senegal, Old Calabar, and Sierra Leone 

 in Africa ; also in India, in the Malayan Archipelago (Moluccas, 

 Philippine Islands, Java, Malacca, Poulo-Penang, &c.), in Cochin 

 China, Siam, Birmania, and Ceylon. 



Syno2)sis of Species. 



Fourth joint of the anterior tarsi bilobate. 



Two punctures on third interval of elytra, intervals moderately 

 plane, apical part of intermediate and posterior tibiae not thickened ; 

 antennae moderately long caffer. 



No puncture on third interval ; intervals very convex, apical part 

 of intermediate and posterior tibise much thickened ; antennae short hrevicornis. 



Fourth joint of the anterior tarsi not bilobate ; no punctures on 

 the third interval. 



Prothorax nearly as broad as the base of the elytra ; intermediate 

 joints of the antennae twice as long as broad capucinus. 



Prothorax much narrower than the base of the elytra ; intermediate 

 joints of the antennae one-third longer than broad cBviulus. 



Orthogonius caffer, Bohem., 



Insect. Caffr., p. 64. 



0. modestus, Per., Trans. S. Afric. Phil. Soc, vol. iv., p. 81. 



Piceous, with the palpi, labrum, antennae, femora, and abdomen 



reddish brown or very dark brown ; head deeply and irregularly 



punctured ; prothorax twice as broad as long, with the anterior and 



posterior margin very slightly sinuate, the outer sides subplicated 



I 



