FoLsoJi. — Development AEurida. 



PLATE 7. 



Fig. 42. Dorsal aspect of completed lingua and superlingu£e. X 480. 



Fig. 43. Surface view (ventral) of adult labium. X 150. 



Figs. 44-50. Transections of internal mouth-parts of adult to show their relations 



to each other and to the buccal cavity. 

 Fig. 44 is the most anterior of the series ; Fig. 50 the most posterior. 

 Figs. 44 and 45 are magnified 350 diameters, Figs. 4G-50, 480 diameters. 



