Mosquito-Eating Fish.

Available in Rabaul.

THE mosquito larvae-eating fish, Gam busia affinis, which were introduced into the Mandated Territory in 1930, have now been distributed widely among outstations and plantations with very satisfactory results.

The Public Health Department is anxious to supply with young fish any residents who wish to introduce this method of destroying the malaria-carry ing mosquito. It will supply, free any quantity in Rabaul.

The fish will carry for about ten days in the original tins without feeding or changing the water, but the containers should be kept cool and any dead fish removed immediately to prevent fouling the water. River, well or clean ground water should be used for changing and not tank water. The fish are a fresh water species, but will survive in brack ish and salt water. When stocking large areas, it is advisable to breed the fish in small pools and distribute them as num bers permit. Breeding pools should have a capacity of at least 250 cubic feet, be moderately shaded, and the edges should be overhung with grass or weeds to pro tect the young fry.