17 
To remove Mucidus and Psorophora from the Culicina and to adopt 
provisionally a new division including Megarhinus, Toxorhynchites, Mucrdus, 
Psorophora, and possibly Fanthznsoma and the genera Lutzza and Famesza, 
would seem to be more natural. 
The larval stages of the Aedeomyzna are so little known that I make no 
attempt to consider the position of this group. In the few species described 
there are however some features, e.g., the larval antennz, which suggest a 
distant relationship to the Stegomyzna rather than to the Culzczna. 
The affinities of the Cudzcide@ would then be shown as follows :— 
( § Megarhinus. 
Toxorhynchites. 
| Mucidus. 
1. Sub-fam. Megarhinina _ .4 Psorophora. 
Fanthinsoma. 
Lutzia. (?) 
_Famesta. (?) 
Stegomyia. 
Desvotdea. 
Hlowardina. 
Detnocerites and 18 other genera (acartomyia ?). 
( § Culex. 
Theobaldia. 
Melanoconion. 
Tentorhynchus. 
Mansonia. 
Grabhamia. (2) 
2, Sub-fam. Stegomytna 
3. Sub-fam, Aedeomyina 
4. Sub-fam. Culicina 
I do not claim the above as, in any sense, a rigid classification, but it 
appears to me that a truer proportion exists inthe groups than in the original 
classification by the adult characters alone. Classification by the scale structure 
has been shown even by the consideration of immature characters to be a very 
natural one, but in the variations of the ovum, larva, and nymph, we have a most 
important additional means of determining the natural affinities of mosquitoes. 
REFERENCES. 
Stephens and Christophers. Reports to the Malaria Committee of the Royal Society. 
7th series. Harrison & Sons. 
Also later “The Practical Study of Malaria.” Longmans, Green & Co, 
James, who was associated with us, has also described the immature stages of most 
of the Indian anopheles “ Malaria in India.” Scientific Memoirs by officers of 
the Medical and Sanitary Departments of the Government of India. New series, 
No. 2. Vide also James and Liston. Anopheles Mosquitoes of india. Thacker, 
Spink, Calcutta. 
2, Meinart. De Encephale Myggelarver. K. Danske veiden scabernes Selskabs 
Skriften. III, Copenhagen, 1886. 
