RHINOMACERIDAE. 421 



Pam. LXXIY— RHINOMACERIDAE. 



Mentum transverse, small, eniarginate in front, supported 

 on a very broad gular peduncle; ligula and palpi small. 



MaxilU« exposed, lobes short, ciliate at tip, inner one very 

 short; palpi 4-jointed, cjdindrical, well developed. Mandi- 

 bles flat, curved, acute, toothed on the inner side. 



Antennee inserted at the side ol the beak near the end, 

 11-jointed, straight, first joint a little stouter thau the second, 

 but not longer, joints 2-6 nearly equal, 7 and 8 a little shorter 

 and broader, 9-11 forming an elongate loose club, the last 

 joint oval, pointed, divided transversely near the tip. All 

 the joints are sparsely pilose, and those of the club are 

 covered with sensitive surface. 



Head prominent, not deflexed, eyes convex, prominent, 

 rounded, not very finely granulated; beak as long as the 

 prothorax, rather flat, narrowest about the middle, wider at 

 base and tip; without -antennal grooves. Labrum distinct. 



Prothorax truncate before and behind, sides convex, pro- 

 sternal sutures distinct, widely separated, parallel in front, 

 then curving inwards, and attaining the coxal cavity about 

 the middle of its outer margin ; coxal cavities rounded, con- 

 fluent. 



Mesosternum flat, pointed behind at the middle, coxal 

 cavities rounded, confluent; trochantin large; epimera trans- 

 verse, oblique, attaining the trochantin. 



Metasternum rather long, side pieces narrow, slightly 

 dilated externally in front. 



Elytra covering the pygidium, rounded at tip, without 

 epipleura3, and without fold on the inner surface near the 

 side. 



Abdomen with five free ventral segments nearly equal 

 in length, separated by straight sutures, intercoxal process 

 acute; dorsal segments coriaceous, nearly equal in length, 

 the last more corneous, articulating with the last ventral ; 

 anal segment of % convex, not very prominent; side margin 

 of abdomen acute, but not fitting into an elytral groove. 



Anterior coxa? prominent, contiguous; middle coxoi 

 rounded, contiguous; hind coxee transverse, slightly sepa- 

 rated by the acute intercoxal process, and extending to the 

 side of the abdomen. 



Legs slender, not elongatc^l, tibiae truncate at tip, middle 

 and hind pair with small terminal spurs; tarsi brush-like 

 beneath, 4-jointed, third joint broad, deeply bilobed, claws 

 divergent, simple or slightly broader at base (in our species). 



