P. H. Bahr 
133 
of a similar anomaly which is known to exist in another mosquito- 
conveyed, but far more serious infection, malaria. 
I would suggest that a small commission, say of two members, be 
sent to one of these ascertained filarial centres, that they be instructed 
to work out radially from these centres, tracing by systematic examina¬ 
tion of the blood of the inhabitants the presumed gradual diminution 
and final disappearance of filarial infection from the district, at the same 
time a study of the mosquito fauna of the region and their topographical 
distribution be ascertained, and their efficiency as filarial carriers be 
determined. 
It may be that the mosquito carrier is widely distributed. If this 
should turn out to be the case, further investigation and experiment 
might show why it is efficient in one place and inefficient in another. 
If the mosquito carrier be limited to special villages, the reason for this 
should be ascertained. 
I can foresee in the successful prosecution of such investigations 
the acquisition of important additions to tropical pathology, and it 
may be valuable indications for the prevention of filariasis, and possibly 
of other mosquito-borne diseases. 
A list of Mosquitoes collected in Ceylon and kindly identified for me 
by Col. Alcock, C.I.E., F.R.S. The letters N.P., S.P ., etc. refer to 
the Northern or Southern Province, etc. 
Species. Localities. 
Anophelines. 
Myzomyia rossi Giles. Badulla(2200 ft.); Nuwara Eliya (6300 ft.); 
Kurunegala (320 ft.); Batticaloa (sea-level). 
„ albircstris Tbeob. Kurunegala. 
„ culicifacies Giles. Kurunegala and Badulla. 
„ punctulata Donitz. „ ,, 
Myzorhynchus sinensis Wied. „ „ 
„ barbirostris v. d. Wulp. „ „ 
Nyssorhynchus fuliginosus Giles. „ 
„ jamesi Theob. „ 
„ maculatus Theob. Kurunegala and Nuwara Eliya. 
Anopheles gigas var. refutans, sp. nov. Alcock. Nuwara Eliya. 
Culicines. 
Culex concolor .. .. Kurunegala and Colombo (sea-level). 
„ gelidus .. .. .. Tangalla (S.P.), and Colombo. 
„ mimeticus .. .. Nuwara Eliya and Kurunegala. 
