MOUTH-PARTS OF THE MALLOPHAGA. 



137 



vinusually broad here. The anterior area of the hypopharynx 

 contiguous with the curvinp^ rami of the " duct " consists of two 

 lobes with a few minute hairs (text-fig. 29). 



Text-fig. 30. 



H3'pophaiyiix of Nitzschia puUcaris, X 570. 

 A, oesophageal sclevite; B, lateral piece; C, posterior cornu. 



Nitzschia pulicaris 'N. (from the Swift). — The lateral pieces are 

 broad and thinly chitinized. The " ducts "ai'e broad, and there 

 are teeth on the anterior area (text-fig. 30). 



