KEARINGS AND DISSECTIONS OF TACHINIDiE, 



97 



are open above, and the flies have free access to them. The invention 

 of this tray is what made success possible with this cage. Food was 

 provided for the flies in the shape of bananas and other fruit cut 

 and sprinkled with sugar, and wet sponges supplied them with 

 requisite moisture. This cage, thus furnished, proved to be a per- 

 fect success, although some supplementary devices were found neces- 

 sary for certain species as the work progressed. The flies mated 

 freely therein and were apparently as much at home as in the open. 



Fig. liO. — Outck.. 1 cajAe 



for learinji Tatlimul.e, 

 trays witliin tlie cage. 



(Grig: 



ili-^position ol 

 lal.) 



tanglefooted " 



PAREXORISTA CHELONI.^ Rondani. 



No difficulty was encountered in securing oviposition on the part of 

 Parexorista chelonm^ which deposited its elongate, cyhndrical, 

 whitish, thin-shelled, and pediceled eggs freely on the small cater- 

 pillars of Euproctis chrysorrhcea just out of the nests. The maggots, 

 upon the hatching of the eggs, penetrated the caterpillars and a good 



