CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 305 



(b) The life-cycle tends to lengthen northward. 



(c) The adult beetles feed on the leaves of oak, ash, elm, poplar, willow, maple, 

 hackberry, plum and apple during the night and migrate to the soil in early morning. 

 Mating occurs at night. They have been observed feeding on corn and grass. 



(d) The eggs are generally deposited in the high grounds covered by vegetation 

 near woodlands. 



(e) Clover, alfalfa and buckwheat are ngt injured, and small grains are not so 

 much injured as are corn, timothy, strawberries and potatoes. 



(/") As the grubs change to pupae about the end of July, disking infested land as 

 soon after that date as practicable destroys large numbers of the tender pupa; and 

 adults in the ground. 



(g) As grubs are small the first year, and large the second year, plowing up to 

 1st of October destroys large numbers. 



(h) White grubs are most abundant in the neighborhood of trees. 



(f) The adult beetles prefer to lay their eggs on (i) pasture, (2) small grains, 

 (3) fallow land grown up to weeds, (4) clover and corn, (5) meadow crops 

 (Forbes). 



Rough Osmoderma {Osmoderma scahra Beauv.). — Adult. A large, 

 bronzy, purplish-black beetle; wing-covers with coarse punctures; 

 thorax narrower than wing-covers. Nocturnal; July-September. 



LarvcB. — -Resemble white grubs, with a hard, reddish head, and 

 horny scales on prothorax. Live in decaying wood of apple, cherry, 

 etc., mature in fall. 



Pupa. — Within an oval cocoon made of fragments of wood. 



Bumble-flowei Beetle {Euphoria indalArm.) . — Adult. — A yellowish- 

 brown beetle, with wing-covers covered with black spots; body covered 

 with fox-colored hairs; under side of body black and hairy; legs 

 black; hibernates. 



Eggs. — -Deposited in refuse heaps of decaying vegetable matter. 



LarvcB. — Resemble white grubs; head small; mandibles and legs 

 short; spiracles prominent; a yellow plate on each side of first thoracic 

 segment; anal slit transverse; dorsal locomotion; live chiefly in rotten 

 wood or decaying vegetables. 



Rose Chafer (Macrodactylus subspinosus Fabr.). — (Consult Cir. 11, 

 Div. Ent., U. S. Dep. Ag.) Frequently injurious to grapes, peaches, 

 plums, roses, etc., destroying the blossoms and newly set fruit. A 

 widely distributed pest. 



Adult. — A long-legged yellowish-brown beetle, ^i inch long, covered 

 with light hairs; legs spiny and long; end of June-first half of July. 

 Feeding for 3-4 weeks. Toxic to chickens and rabbits. 

 20 



