FLEA-BEETLE.'^ 331 



Reference 

 U. S. Div. Ent. Bull. 19, pp. 80-85. 1899. 



The Yellow-Necked Flea-Beetle 



Disonycha mellicollis Say 



This beetle is found from New Jersey, Indiana and Colorado 

 southward to Florida and Texas. It is d[)sely related to the 

 spinach flea-beetle, from which it maybe distinguished by having 

 all the femora reddish or yellowish. It has been recorded as 

 injurious to beets and spinach in Texas and Florida. Its wild 

 food plants are amaranth and purslane. The beetles come out 

 of hibernation early in the spring and deposit their blood-red 

 eggs, similar to those of the spinach flea-beetle, in clusters of 

 forty or fifty on the leaves or on the ground at the base of the 

 food plants. The eggs hatch in four to ten days. The larviii 

 feed on the underside of the leaves, injuring the plant in much 

 the same way as do those of the spinach flea-beetle. They 

 become full-grown in about eleven days and are then dull 

 yellowish red. Pupation takes place in the ground and the 

 beetles emerge in about five days. 



Reference 

 U. S. Bur. Ent. Bull. 82, pp. 29-32. 1909. 



The Three-vSpotted Flea-Beetle 



Disonycha triangularis Clievrolat 



This closely related species ranges through the United States 

 and Canada east of the Rocky Mountains. It has been re- 

 ported as injurious to beets, mangels and sugar-beets. Its 

 wild food plants are lamb's quarters and spiny pigweed. The 

 i inch in length, bluish black ; the prothorax is 



