242 



INSECTS. PHYLUM ARTHROPODA 



nw. 



Fig. 177. — Mouth-parts of Diptera. — From Borradaile and Potts, The Invertebrata, 

 2nd edition. 1935. Cambridge University Press. A-D after Patton and Cragg. 



.-1, Culex pipiens i\ B, Glossina submorsitans ; C, transverse section through proboscis of Culex; D, 



transverse section through proboscis of a muscid fly ; E, proboscis of a muscid fly, extended ; F, the 



same, hulf folded. 

 an .antenna ; e., eye ;/.c., food channel ; hyp., hypopharynx ; Ibm., labium ; Ibl., labellum ; Ibr.ep., labrum 



epipharynx ; md., mandible ; tnx., maxilla ; mxp., maxillary palp ; ph., pharynx ; ph.p., pharyngeal 



pump ; pstra., pseudotracheae ; sd., salivary duct. 



