1912] Muir and Kcrshatc — Development of Mouihparts of Homoptera 



89 



(3) There is no "mandibular plate." 



(4) The tentorium agrees essentially with that of other insects. 



(5) The maxillary seta does not represent the palpus, but may 

 be a development of the palpiger or the combined lacinia and 

 galea. 



(6) The maxillary-plate represents the cardo and stipes. 



LETTERING OF FIGURES. 



