793
9. The following Table shows the stations from which Anopheles were sent to me, and the per- centage of Anopheles among the total mosquitoes received from those stations :-
Anopheles.
Culex.
Mosquitoes examined.
Number.
Per cent.
Number.
Per cent.
No. 1 Station,
No. 2 Station,
1,261
6
0.5
1.255
99.5
575
1
0.2
574
99.8
No. 3 Station,
1,178
1
0.1
1,177
99.9
Pokfulam,
852
21
2.5
831
97.5
•
Aberdeen,
688
7
1.
681
99.
Stanley,
963
15
1.6
948
98.4
Shek 0,
748
116
15.5
632
84.5
Tsat Tsze Mui,
600
47
7.8
553
92.2
Yaumati,
1,066
1
0.1
1,065
99.9
Fuk Tsun Heung,
558
I
0.2
557
99.8
Kowloon City,
1,717
1
0.1
1,716
99.9
Sha Tin,
572
43
7.5
529
92.5
Sai Kung,...
552
8
1.4
544
98.6
Tai Po,
809
191
23.6
618
76.4
Sha Tau Kok,
4,401
414
9.4
3,987
90.6
Sheung Shui,
815
10
1.2
805
98.8
San Tin,
837
14
1.7
823
98.3
Au Tau,
1,841
113
6.1
1,728
93.9
Ping Shan,
245
12
4.9
233
95.1
Tai 0,
399
38
9.5
361
90.5
Tung Chung,
226
78
34.5
148
65.5
Ch'eung Chau,
4,704
1
0.02
4,703
99.98
Lamma,
604
30
5.
574
95.
10. In Appendix II. I describe systematically the mosquitoes that prevail in the Colony, examining in each case the wings, legs, head appendages, thorax, abdomen, and size. The size I express in millimetres (inch). It will be noted that, so far as Hongkong is concerned, the wings of Anopheles are in all species spotted, and those of all forms of Culex unspotted.
There are three species of Anopheles, a sub-species of Anopheles Sineusis, and two species which have been recognised as new species, not thus far observed elsewhere, by Mr. F. V. THEOBALD, Ento- mologist at the British Museum, to whom I submitted them. He has named one of them Anopheles Maculatus from its markings, the other Anopheles Minimus from its minute size. The former I at first believed to correspond to Anopheles Costalis of West and South Africa, but there are specific differences. I need not here enter into descriptive details, which I have set forth at length in the Appendix.
Anopheles Sinensis breeds chiefly in the rice-fields and the ditches surrounding or draining them, the other two chiefly in the ravines; but they do not confine themselves exclusively to their usual habitats.
As to the relative prevalence of the three species of Anopheles, I am not able to speak as regards the 294 Anopheles which I received during the last quarter of 1900, but of 875 received during the three quarters of 1901 included in this research, 483 were Anopheles Sinensis, 249 Anopheles Macu- latus, and 143 Anopheles Minimus.
11. I have differentiated twelve species of Culex, which I describe at length in the Appendix. There are probably considerably more, as some of the varieties of certain species which I describe may be regarded by entomologists as distinct species. I do not attempt to follow Theobald in his new classification of mosquitoes, just published in the Tropical Journal, into twenty-four different genera, breaking up the old genus Culex into some twenty new genera, based on the arrangement of the scales which cover the insects. For instance, he now describes Culex Scutellaris and Culex Obturbans, two of the most common of the Hongkong mosquitoes, as Stegomyia Scutellaris and Armigeres Obturbans. Culex Fatigans, Culex Scuttellaris, Culex Obturbans, and Culex Concolor have been described before. Culex Anulus, Culex Sericeus, and Culex Reesii are new species, and have been named by Mr. Theobald from specimens which I submitted to him. Culex Reesii he has so called from our