4 RUTELIIO3. 



of the mandibles in the males like that so characteristic of the 

 Stag-beetles. The organs of the mouth do not differ essentially 

 from those of the DYNASTIN^E, but the labrum is more developed 

 and is sometimes produced in a vertical direction to meet the 

 labium. This process has advanced to such a degree in the genus 

 Adoretus that the mouth is completely divided and the ends of the 



Fig. 1. Mimela macleayana and enlarged details: h., head; c., clypeua 

 pro., prothorax; prn., pronotum ; pst., prosternum ; mst., mesosternum 

 mp., mesothoracie epiuaeron ; tntep., metathoracic episternum ; s., sou 

 tellum ; c.cox., coxal cavity ; ab., abdominal segment ; pg., pygidium 

 ., elytron, sut., elytral suture; f.L, fore leg; m.l., middle leg; h.l. 

 hind leg ; cox., coxa ; tr., trochanter ; fern,, femur ; tib., tibia ; tar., tarsus 

 ant., antennae; sc., scape; cl., club; m., mandible; mx., maxilla; mp. 

 maxillary palpns; lr., labrum; I., labium; me., mentum ; lp., labial palpus 



mandibles are unable to meet and instead work one against each 

 side of the process, the sides of which are sharply toothed or 

 ridged. Except in the PABASTASIINI, to which belong the species 

 just referred to with enlarged mandibles in the male, and the 

 allied RTJTELINI in America, the mandibles in the resting position 



