14 



INSECTS INJURIOUS TO STAPLE CROPS. 



considerably, but all agree in that their food must Ije 

 sucked up in a liquid state. Any application of a poison - 



Fig. 6. — Cicada, showing Mouth-parts of a Bug, a Sucking Insect. 

 a, seen from below, beak or rostrum {ro. G. ) reposing between 

 forelegs; b, head removed; e, eye; l})r., labrum; md., man- 

 dlble-setae ; mx., maxillary seta^ ; lab., labium. (Original.) 



ous spray to the surface of foliage will be of no avail 

 against them, though sure death to most biting insects 



