22 LAMELLICORNIA — MELOLONTHIDAE. 



SEBICinES, 



A, Anterior tarsi short. 



Antennae with nine joints, club three-jointed. 



Homaloplia, Steph. 

 J5. Anterior tarsi long and slender. 



Antennae with nine or ten joints, club three-jointed. 



S erica, Mc. L. 



Hofnaloplia, 



Black, rather shiny ; elytra red-yellow, with suture and 

 outer margin black. Hairs on male black on upper-side, 

 gray on under-side ; on female all gray. L. 2| — 3 J 1. Not 

 very common. H. ruricola, Fab. 



Serica. 



Oblong, somewhat cylindrical. Brown-red, dull ; fore- 

 head rather darker. Antennae with nine joints ; eyes 

 large and prominent : elytra with striae, interstices narrow 

 and arched. L. 4 1. Moderately common ; by sweeping 

 at dusk. S. hrunnea, Lin. 



MBLOLONTHIDES, 



A* Third joint of antennae longer than fourth ; club in 

 male composed of seven and in female of six joints. 



Labial palpi inserted on side margin of labium ; tarsal 

 claws with a little pointed tooth at base. Melolontha, Fab. 



JB. Third joint of antennae equal in length to fourth ; 

 club three-jointed. 



Labial palpi inserted on outer surface of labium near 

 margin ; tarsal claws with a little upright tooth at base. 



Bhizotrogus, Latr, 



Melolontha. 



A, Process of last dorsal abdominal segment long, gradu- 

 ally narrowed. 



Black ; elytra brown-red ; abdomen with triangular spots 

 of white hairs at sides. Colour of thorax and elytra 

 slightly variable. L. 12 1. Common. M. vulgaris, Fab. 



jB. Process of last abdominal segment short, narrowed at 

 base and a little dilated toward apex. 



