LA.MELLICORNIA. O 



In the ball-rolling Coprin^, of which the well-known Sacred 

 Scarabseus is the type, the front tarsi have completely disappeared. 

 The front tibiae are the principal implements for the manipulation 

 of the dung of which the food-ball is made, and the tarsi evidently 

 became an encumbrance and gradually atrophied. In other related 

 genera, such as Chelronitls, the tarsus is absent only in the male, and 



Fig. 2. — Agestrata orichaleea (Family Scarab.eid.e, Subfamily Cetoniin.k) and 

 enlarged details : — h., head ; c, clypeus ; jiro., prothorax ; jjrn., pronotuni ; 

 ^osi*., prosternuni; /«ca\, mesothoras; /MA'?'.,me80sternum; //ic;j., mesotlioracic 

 episternum ; iitp., mesotlioracic epimeron ; vicf., metathorax ; mtst., meta- 

 sternuin ; mtep., metathoracic episterniuu ; mfp., metathoracic epimeron ; 

 s., scutellutn ; r. cav., coxal cavity ; ah., abdominal segment ; pg., pygidium ; 

 ppg., propygidium ; c, elytron; sut, elytral suture; f.L, fore leg; m.L, 

 middle leg; h.L, hind leg; cox., coxa; tr., trochanter; fem., femur; 

 e^/7>., tibia ; te/\, tarsus ; a«/., antenna; *>■., scape ; c/.,ehib; »i., mandible ; 

 «i.r., maxilla ; vqj., maxillary palpus ; Ir., labrum ; I., labium ; mc, mentum ; 

 Ijp., labial palpus. 



present, but very minute, in the female. In these and all the groups 

 whose members are generally found upon the ground the claws are 

 quite simple and symmetrical, but they assume a great variety of 

 forms in the groups of arboreal habits. They may be cleft or toothed 

 in multitudinous ^^•ays, they may be fixed or freely movable, and one 



