*■ mx. 



Fig. 348. 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 and with left labellar lobe removed. F, Proboscis of a 

 muscid fly, half folded, an. antenna ; e. eye ;/.c. food channel ; hyp. hypopharynx ; 

 Ibm. labium; Ibl. 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. 



