MANUAL OF NATURAL HISTOBY. 189 



sub-ovate ; body oblong ; abdomen entirely 

 concealed by the elytra; legs short, equi 

 distant ; thighs with a row of hairs within ; 

 tibiae broad, dentate. Terrestrial Living on 

 excrementitious matter. 



39. Family. — Rhinoceros-Beetles (Dynastidae). An- 



tennae 10 or 11-jointed; mandibles horny, 

 convex, obtuse at tip, exposed; club of an- 

 tennae short, ovate ; clypeus small, triangular, 

 usually horned ; body large, the males often 

 with horns and tubercles on thorax, legs 

 stout, anterior tibiae strongly dentate ; tarsi 

 long. Arboreal. Living on decayed trees. 



40. Family. — - Kangaroo-Beetles (Rutelidae). An- 



tennae 10 or 11-jointed; mandibles horny, 

 exserted, with a notch on inner margin near 

 tip ; body ovate, depressed ; scutellum dis- 

 tinct ; elytra shorter than abdomen ; thorax 

 and clypeus unarmed ; legs robust, hinder 

 thighs sometimes greatly thickened ; claws 

 of tarsi usually unequal in size. Arboreal 

 Living on the decomposed matter of decaying 

 trees. 



41. Family. — True-Chaffers (Melolonthidae). An- 



tennae 10 or 11-jointed; mandibles horny, 

 stout, concealed ; labium concealed by men- 

 turn ; club of antennae foliated ; labrum bi- 

 lobed ; body ovate, sub-convex, shorter than 

 abdomen ; legs rather long and slender ; 

 tibiae not dilated ; claws bifid or dentate. 

 Arboreal. Eating the leaves of trees. 



