OF WASHINGTON. 117 



covered the time between September 26th and November 

 or. in other words, the early fall, which is usually a very prolific 

 mosquito period. Furthermore, malaria is much more feared in 

 China than in Japan, which would indicate a greater prevalence 

 of the species of the genus Anopheles. The exploration of China 

 extended from the region north of Pekin southward to Hong 

 Kong. At no place visited were mosquitoes at all abundant, and 

 only a few individuals were'captured. The conditions in China 

 are very similar to those in Japan, namely, a great deal of the 

 country from the center southward is devoted to the culture of 

 rice, and there are always more or less of canals leading through 

 and around the cities. The cities proper, however, are not 

 broken up by canals as completely as they are in Japan. The 

 highways of China are canal,s instead of roads, and the products 

 of the country are taken along these canals in the peculiar Chinese 

 junks or scows, and travel in the interior is necessarily, for the 

 most part, in boats on these canals. In that way the writer made 

 a trip into the region west of Shanghai in a house-boat, going 

 through many miles of these country canals, and part of the way 

 through the grand canal which connects Pekin in the far north with 

 the ocean at the southern part of Hang-chow. The conditions, 

 therefore, were favorable enough for an abundance of mosquitoes, 

 and their absence was rather remarkable, under the circumstan 

 ces. The mosquitoes collected in and about Shanghai in Central 

 China and at Tientsin, and Pekin in north China, were Culex 

 pipiens Linne. On the house-boat trip into the interior west of 

 Shanghai where one was living all the time on the water of the 

 little canals, for the most part with ' scarcely any current, the 

 mosquitoes were only noticeably bad at one place, namely, Hain- 

 ing, and we were much bitten during the nights spent there. In 

 fact, no mosquitoes were observed elsewhere on this trip. The 

 house-boat was open, and most of the mosquitoes at Haining es 

 caped at daylight, and only a few were captured. These repre 

 sented two species, Anopheles sinensis vanus Walker, a species 

 originally described from Celebes and reported by Theobald from 

 the Malay Peninsula and India, and represented further in the 

 National collection by specimens from the Philippines. This 

 Anopheles is the one that was the greatest pest at this point. 

 The other species was Mr. Coquillett's Culex subalbatus, which 

 was originally described from Japan, and has not hitherto been 

 reported outside of that country. 



A stop of several days was made at Singapore, British Straits 

 Settlements, Malay Peninsula, and we were very much annoyed 

 all the time, day and night, by the persistent attacks of mosqui 

 toes. The most troublesome of the mosquitoes was the very 

 prettily marked little Stegomyia (Stegomyia fasciata Fab.j, 

 originally described from the West Indies, but occurring over 



