GRAMINEOUS CROPS. 



79 



markings on tlie dorsal side of tte thorax and abdomen. 

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

 perfect insect makes its appearance usually in May. The 

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

 leaves of barley plants. The eggs are hatched in four 

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



Fig. 32. — ^EiBBON-rooTED Cobn Fly (Chlorops taniopus). 



A. The fly (enlarged). 



B. Its natural size. 



E. D. enlarged. 



0. Larva (nat. size). 

 D. Infested stem. 



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 larvae of Clilorops hibernate 



' See his Praktische Insekten-Kunde and his various memoirs. 



