GRAMINEOUS CROPS. 



79 



markings on the dorsal side of the thorax and abdomen. 

 The six legs are yellow with black tarsi (feet). The 

 perfect insect makes its appearance usnally in May. The 

 female lays eggs (white) near the base of the sheathing 

 leaves of barley plants. The eggs are hatched in fonr 

 or five days, when the yellow, legless maggots pierce a 



Fig. 32. — ^Ribbon-footed Corn Ply {Ohlorops tceniopus). 



A. Tlie fly (enlarged). 



B. Its natiiral size. 



C. Larva (nat. size). 



D. lafested stem. 



E. D. enlarged. 



way into the young ears of corn, and feed there by ex- 

 tracting the sap, etc., of the host-plants. " The larva 

 always makes a furrow from the base of the ear to the 

 first joint or knot of the stem. In this furrow the change 

 from the larval to the pupal stage takes place." Accord- 

 ing to Dr. Taschenbergi the larvs of Chlorops hibernate 



See his Praktische Insekten-Kunde and his various memoirs. 



