Fig. 325. Types of mouth parts of the Diptera. A, Culex pipiens, ?. B, 

 Glossina suhmorsitans . C, Transverse section through proboscis of Culex. 

 D, Transverse section through proboscis of a muscid fly. E, Proboscis of a 

 muscid fly, extended. F, Proboscis of a muscid fly, half folded, an. antenna; 

 e. eye; f.c. food channel; hyp. hypopharynx; Ibm. labium; Ihl. labellum; 

 Ibr.ep. labrum epipharynx; md. mandible; mx. maxilla; mxp. maxillary 

 palp; ph. pharynx; ph. p. pharyngeal pump; pstra. pseudotracheae ; sd. 

 salivary duct. A-D, after Patton and Cragg; E, F, original. 



