mosquitos, n. — Green’s Dictionary of Slang

mosquitos n.

also mosquitoes

[? the marks left by the hypodermic rather than a ref. to the actual drug]

(drugs) cocaine; thus mosquito bit, addicted to cocaine.

1949		Monteleone Criminal Sl. (rev. edn).
1953		Anslinger & Tompkins Traffic In Narcotics 312: mosquitoes. Cocaine.
1959		J.E. Schmidt Narcotics Lingo and Lore 115: Mosquito bit – Addicted to cocaine. Mosquitoes – Cocaine as an addiction drug.
2001		ONDCP Street Terms 15: Mosquitos — Cocaine.