128 
.4 nopheles Maculipennis 
advocated this classification. Great stress has been laid on the reduced 
condition of the mouth-parts which are not adapted for piercing and, 
correlated with it, the feeding habits of the female. Additional 
characters have also been found in the neuration of the wings and the 
absence of scales from the latter. It is the belief of the author of this 
paper, however, that the Corethrinae are best retained as a sub-family 
of the Culicidae. 
The reasons for this conclusion are as follows:— 
The newly discovered genus Pelorempis, though agreeing with 
Sayomyia and Corethra in the form of the proboscis, resembles the 
Culicinae in possessing scales to the wings. The larva, moreover, as 
has already been pointed out, greatly differs from those of the remaining 
Corethrinae. The Sayomyia larva, it is true, is totally different from 
any other Culicid larva, but those of the remaining Corethrinae are 
clearly intermediate in the structure between that genus and the 
general Culex type of larva. It is, therefore, clear that the limits of the 
Corethrinae cannot at present be very well defined and, for that reason, 
it is better to retain the group as a sub-family only. 
The resemblances between the larvae of the Anophelinae and the 
Culiciuae, as regards their internal anatomy (the presence of cardiac 
coeca and five Malpighian tubes), and the great divergence between 
those groups and the genus Sayomyia (four Malpighian tubes and the 
absence of cardiac coeca), are sufficient to suggest that an anatomical 
study, of typical representatives of the different groups, may prove 
a valuable aid towards a rational classification of the family. 
LITERATURE. 
Anglas, J. (1901), Observations sur les metamorphoses internes de l’Abeille. Bull. 
Sci. de la France et de la Belg. t. sxxiv. p. 363. 
Balbiani, E. G. (1885), Contribution il Petude de la formation des organes sexuels 
chez les Insectes. Rec. Zool. Suisse , t. ii. p. 527. 
Berlese, A. (1901), Osservazioni sopra fenomeni che avvengono durante la nimfosi 
degli insetti metabolici. Rev. di Patolog. Veget. vol. vm. p. 1. 
Christophers, S. R. (1906), On the importance of larval characters in the Classifi¬ 
cation of Mosquitoes. Sci. Mem. by Officers of the Med. and Sanit. Departs. 
Govt. India , N.S. no. 25, Calcutta (office of the Superintendent of Government 
Printing). 
Coquillett, D. W. (1903), A new Culicid genus allied to Corethra. Canad. Entom. 
vol. xxxv. p. 189. 
- (1906), A Classification of the Mosquitoes of North and Middle America. 
U. S. Dept. Agric., Bureau of Entom ., Tech. Ser no. 11, p. 31. 
