Genus Megarhinus. 13 
parasite of malignant malaria (Malaria in St. Lucia, West Indies, 
‘Brit. Med. Journ.’ 25.1.02).” 
It is ditticult to keep them alive in captivity though fed on 
blood. 
The larvae have four simple frontal hairs, the antennae 
with two lanceolate terminal processes and a median bristle and 
spines down one side. The palmate hairs (d) are jagged at the 
sides. 

Genus 10. ALDRICHIA. nov. gen. 
(Vide Appendix.) | 

Sus-rFaAMILy MEGARHININA. 
Genus Il. MEGARHINUS. Robineau-Desvoidy. 
(Mono. Culicid. I., p. 215. 1901.) 
This genus has been considerably reduced in size by taking 
out a number of species in which the 9? palpi are comparatively - 
short, and which come therefore in the genus Toxorhynchites. 
Probably a number of others will have to be excluded from 
Megarhinus ; but until good specimens are obtained it is not 
possible to say, as I cannot yet detect any difference except in 
the @ palpi, which when broken in Megarhinus look very like 
those of Toxorhynchites. Probably Walker’s M. inornatus will 
have to be excluded. ; 
Mrcaruinus (?ToxoRHYNCHITES) GRANDIOSUS. Williston. 
(Biol. Centr. Amer., Dipt., p. 224.) 
“2. Antennae brown. Proboscis black. Palpi black, covered 
with black and violet tomentum. Face somewhat reddish. 
Occiput black above and covered with green and_ yellow 
tomentum. Thorax deep red, the ground colour of the mesono- 
tum mostly concealed beneath a metallic-green tomentum, that 
of the pleurae mostly silvery or yellowish-white, Abdomen 
brown or yellowish brown, the dorsum concealed beneath green 
tomentum, like that of the mesonotum. Legs yellow; dorsal 
VOL. III. I 
