404 Mr. C 0. Wateili<Hiso on neic Genera 



angustato, marginibus reflexis ; dytris capitc thoracequc paulo 

 longioribus, huvibus ; antoiinanini articulis (juatuor basalibus nu- 

 (lis, rufescontibus. Long. 5] lin., lat. 2 lin. 



The general colour is pitchy ; the base of the anteniuv ami 

 the parts of the mouth are reddish, the apex of the mandibles 

 black. The head is large, impunctate, with a slightly im- 

 pressed fovea on the forehead. The thorax is a little broader 

 than the head, one quarter broader than long, im|)unctate, 

 truncate in front and behind, the anterior angles nearly right 

 angles ; the sides in front very slightly rounded, behind the 

 middle very strongly sinuated, thus making the thorax much 

 narrower behind than in front; the posterior angles are very 

 slightly diverging, scarcely acute. The elytra are a little 

 broader tlian the thorax at its broadest part, a little longer than 

 the head and thorax taken together, gently convex, depressed 

 on the back, im])unctate and without stria3. Anterior tibiae 

 somewhat strongly flexuous, the internal incision very strong, 

 and tooth veiy acute. Antennre as long as the thorax and 

 head (without the mandibles), stout ; the basal joint large, the 

 second joint about half the size, the third and fourth a trifle 

 longer, the fifth to tenth becoming a little broader and slightly 

 transverse ; the eleventh elongate, with the apex rounded. 



Hub. Madagascar. B.M. 



Lamellicorxia. 

 Hybosoridse. 



Ar-SOTANYPUS, gen. nov. 



Mentum quadrate, slightly rounded at the base, the anterior 

 angles obliquely truncate ; labium only slightly visible at the 

 sides, on account of the angles of the mentum being truncate. 

 Laljial palpi very stout ; the penultimate joint small, as long 

 as broad ; the a])ical joint large, ovate, scarcely truncate at the 

 apex. Lobes of the maxillai membranous, thickly clothed 

 with stiff hair. Maxillary palpi with the apical joint four 

 times as long as the preceding joint, subfusiform, with the apex 

 very slightly truncate. Labruni transverse. Mandibles stout, 

 much curved, with the apex acute ; these with the labrum 

 visible from above. Antennaj composed of eleven (?) joints ; 

 the first joint large, stout ; the second nearly globular ; the 

 third nearly as long as the first, but comparatively slender, 

 subcylindrical ; the fourth, fifth, and sixth shorter, the sixth 

 obliquely truncate at the apex ; the seventh transverse, nar- 

 rowed at its base ; the eighth very short, and almost con- 

 founded with the first joint of the club ; the ninth, tenth, and 



