812 



STUDIES IN AUSTRAIJAV XEUROPTKRA, VU., 



in the imago has only a single lobe, with a less prominent apical 

 tooth and a broader cutting-blade. The left mandible, on the 

 other hand, is still bilobed, the basal lobe being rounded as in 

 the pupa, but the distal lobe forming a single strongly projecting 



Text-fig. 12. 

 Mouth-parts of imago of Ps. ehfjans (Guer.), 9 . a, Labruni and mandibles. 

 />, Left maxilla and labium; A/? hypopharjnix; rest of lettering as in 

 Text-fig. 10; (X 48). 



tooth, whose internal border is definitely hollowed out. Thus, 

 in the imago, the cutting-edge of the right mandible works into 

 the groove of the left in a very simple manner. These mandibles 

 may possibly be used for feeding upon gum-exudations. In cap- 



