22 



TKE xMONTIlLV BULLETIN. 



Life History. — Tho eggs are deposited in the fall and constitute the 

 winter stage. In the spring the young katydids escape from the 

 exposed ends and immediately begin work upon the foliage, continuing 

 their destructiveness throughout the spring, summer and fall. The 

 broods <\ro uneven so ^dl stayes mav Ik^ found throngliout the summer. 



Fig. 21. — Katydid <:ggs, showing exit lioles 

 of tlie egg-parasite, Eupehivus inirahilis. 

 ■ (Original.) 



Distribution.— Throughout the entire State, but especially common 

 in the.citrus-growing'sections. More damage is done in the Sacramento 

 Valley than anywhere else. 



Food Plants. — Particularl.y destructiv(^ to orange trees. Usually 

 the foliage is the only part affected, but occasionally they gnaw into 

 the young fruit, producing deep and ugly scars, which render it 

 unfit for market. (Fig. 20.) 



Control and Natural Enemy. — The egg parasite (EupebuKs iiiirah- 

 ilis) is practically responsible for the control of this pest and may be 

 relied upon to keep it down to where great or excessive damages can 

 not resnlt. It is wise to collect the eggs during the winter and place 

 them into boxes covered with screen. As the small parasites gnaw their 

 way out of the egg through small holes at the top they may escape to 

 continue their good work, while any young katydids that may hatch 

 out cannot escape because of their long legs and antenniv. It is very 

 difficult to secure colonies of the eggs without finding many showing 

 the holes made by the parasites. 



