MANUAL OF NATURAL HISTORY. 189 



sub-ovate ; body oblong ; abdomen entirely 

 concealed by the elytra; legs short, equi- 

 distant ; thighs with a row of hairs within ; 

 tibiee broad, dentate. Terrestrial. Living on 

 excrementitious matter. 



39. FAMILY. Rhinoceros-Beetles (Dynastidse). An- 



tennaa 10 or 11-jointed; mandibles horny, 

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

 tenna3 short, ovate ; clypeus small, triangular, 

 usually horned ; body large, the males often 

 with horns and tubercles on thorax, legs 

 stout, anterior tibia3 strongly dentate ; tarsi 

 long. Arboreal. Living on decayed trees. 



40. FAMILY. Kangaroo-Beetles (Rutelidas). An- 



tenna3 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-Chafers (Melolonthidae). An- 



tennas 10 or 11-jointed; mandibles horny, 

 stout, concealed ; labium concealed by men- 

 turn ; club of antennas foliated ; labrum bi- 

 lobed ; body ovate, sub-convex, shorter than 

 abdomen ; legs rather long and slender ; 

 tibiaB not dilated ; claws bifid or dentate. 

 Arboreal. Eating the leaves of trees. 



