84 



NORTH AMERICAN DIPTERA 



Anopheles larva. Compare position at surface of water with that of Aedes. 

 (After Matheson, courtesy C. C. Thomas). 



.-n '•)-■»?, 



COMPOUND / 

 EYE- 



MAXILLARY 

 PALP ^~ 



ANTENNA < 



^LABRUM - 

 " EPIPHARYNX 

 — FOOD CHANNEL 

 -HYPOPHARYNX 

 -MANDIBLE 

 l-'MAXILU 



LABRUM- 

 7 EPIPHARYNX 



^FOGO CHANNEL 



-HYPOPHARYNX 

 — SALIVARY DUCT 

 ^MANDIBLE 

 —MAXILLA 



HYPOPHARYNX 



MANDIBLE 



LABELLA 



MAXILLA 



Head and mouth-parts of a mosquito. 

 (After Metcalf and Sanderson). 



