2C0 ANGUS MACDONALD. 



identifications, has assisted me in many ways and tried liis best to make an Ento- 

 mologist of me. I am also indebted to Mr. F. AV. Edwards, of the British Museum 

 (Natural History), for having identified mosquitos referred to him by Mr. MacCJregor, 

 and among these Mr. Edwards has described one of the new species mentioned in this 

 ])aper. 



The only Anopheline found has been Anopheles arcpjrotarsis, R. D.. a recognised 

 malaria-carrier. Its permanent habitat in Grenada lies in the shallow moist flats in 

 the neighbourhood of lagoons and estuarine swamps around the coast of the whole 

 Island. Individually these spots are of no great dimensions ; many are remote fi'om 

 human habitations, and effort properly directed should be able to abolish the breeding 

 places at little cost. 



, The temporary breeding places are unfortunately scattered throughout the Island 

 in intimate contact with the residences of the human population. Chiefly in the 

 wayside gutters along highways and byways, and in hoof-marks, pig- wallows, trenches, 

 and flats in grass land and elsewhere are these temporary breeding places to be found. 



The streams are mostly brawling torrents rushing rapidly to the sea in narrow 

 boulder beds, for the most part shaded by cacao and forest growth, and in general 

 are exempt from malarial indictment. When the waters are low, ideal algae-growing 

 Anopheline breeding pools are formed and in the streams of the nature described, 

 but running through open scrub land in the coast belt, where the sun can beat all day, 

 Anophelines will breed (PL iii, fig. 1). 



lender the shade of cacao, and elsewhere in shade, I have repeatedly examined 

 seemingly ideal Anophehne pools without finding any trace of the existence of these 

 mos(piitos. A. argyrotarsis loves pools on which the sun will shine most of the da}', 

 and the larvae are to be seen in these in great numbers, tangled in algae, more 

 frequently on the shaded side of the sun-heated pool ; but they avoid pools where 

 there is any excess of overhead shade. 



The well-grown larvae hatch out readily in captivity, but whether kept in sun or 

 shade the younger larvae tend to die otf. 



The mature insects of both sexes feed greedily on sugar and syrup. Their belHes 

 can be seen distended to look like pearls, and in default of a meal of blood the syrup 

 helps to make them more presentable when pinned out as specimens. The captive 

 female feeds readily on blood at any hour of the day. 



Stegomijia jasciala, F., is the common domestic mosquito and is frequent in the 

 usual infinitude of receptacles in and about house and yard in the town of St. George's, 

 and no doubt in the other towns and villages of the Island. 



In the country districts Stegomijia fasciata is not so common. Only twice out of 

 many searchings have I found the larvae about native dwellings in the country, once 

 in a wooden barrel and again in an earthenware jar. For three months also at my own 

 residence, at an elevation of 800 feet, surrounded by cacao and fruit trees and within 

 a few hundred yards of native cottages, I set traps in vain for Stegomyia. Afterwards, 

 liowever, they arrived and could be obtained in abundance in stray vessels set about 

 the house and at the edge of the cacao plantations. 



Never did I find the lar\^ae in the empty cacao pods which are the common breeding 

 place of Limatus dtirhami 1 have found them in rock-holes (containing rain-water) 



