TROX. 21 



Dull gray-black. Front of forehead somewhat angular 

 and raised in middle ; elytra with shallow, notched striae, 

 interstices alternately, with rows of larger and smaller tufts 

 of very short brownish-yellow bristles. Rather common. 



T. sc ether, Lin. 



MEL OL ONTHIUAE, 



A, Claws unequal. 



Mandibles with a broad membranous border on inner- 

 side ; labrum not projecting beyond front of clypeus, either 

 horizontal or turned downward. Anterior coxae projecting ; 

 posterior coxae not dilated ; hinder tibiae with only one or 

 no apical spine. Abdomen apparently with only five ventral 

 segments, the sixth being hidden in fifth ; segments soldered 

 together. Hop lid es. 



JB. Claws equal. 



a. Ventral segments of abdomen not soldered together. 



Mandibles with a broad membranous border on inner- 

 side ; labrum completely united to clypeus. Anterior coxae 

 projecting ; posterior coxae generally dilated ; hinder tarsi 

 long and slender. Scutellum triangular. Sericides. 



b. Ventral segments of abdomen soldered together, with 

 seams effaced in middle. 



Mandibles with a very narrow, leathery border to inner- 

 side ; labrum prominent, usually deeply emarginate. An- 

 terior coxae scarcely projecting ; posterior coxae dilated, 

 but always leaving apex of first abdominal segment free. 

 Scutellum rounded. Melolonthidcs. 



HOBLIJDES. 



Club of antennae three-jointed ; all the tibiae without 

 apical spines ; posterior tarsi with only one claw. 



Hoplia, 111. 



Head and thorax black ; elytra red-brown or brown-red 

 in male, always brown-red in female. Male with scales on 

 upper-side gray, on under-side blue ; antennae brown and 

 legs usually black ; female with scales green, antennae and 

 legs red. Claw of posterior tarsi split. L. 3|- — 4 1. 

 Common. E. philanthus, Sulz. 



