MOUTH-PARTS OF THE MALLOPHAGA. 



Text-%. 27. 



135 



Hypopharynx of Dochophorus sphenophorus, X 360. 



A, oesophageal sclerite; B, duct ; C, bifid sclerite; D, lateral piece; 

 E, anterior cornu ; F, posterior cornu. 



Text-fia:. 28. 



Hypopharynx of Tetrophtalmus titan,, X 204. 



A, oesophageal sclerite; B, the two rami ; C, lateral piece-; 

 J), posterior cornu ; E, maxillary fork. 



