ClipArt ETC
"Diagrammatic vertical section of the head and proboscis of a mosquito. l, labium bent as when the other parts pierce the skin; p, pumping organ; o, hypopharynx through which is a channel for the exit of the secretion of the poison and salivary glands pn and s; d, exit for poison and saliva; m, maxilla; ma, mandible; la, labrum below which is the channel conducting the food from the inlet at n; st, stomach." —Davison, 1906

Proboscis

"Diagrammatic vertical section of the head and proboscis of a mosquito. l, labium bent as when the other…