MOSQUITOS COLLECTED IN PALESTINE. 393 



Larvae were found in water receptacles of all descriptions, including flower-vases 

 in a sitting-room, fire-buckets containing clean water, and a disused boiler in a 

 kitchen. 



The adults are most troublesome in the hot season, and are suspected of being 

 carriers of the organism causing "Aleppo sores" and "Jericho boils." Some 

 of the Palestine specimens are very beautiful, having the dorsal surface of the 

 ..abdomen almost; completely covered with silvery scales. 



Palestine : Jaffa ; Jerusalem ; Haifa ; Jenin ; Tiberias. Syria : Beirut ; 

 Damascus ; Aleppo. 



Ochlerotatus caspius, Pall, (dorsalis, Theo., 7iec Mg.) 



A very abundant and widely distributed species in Egypt, but so far as my 

 observations go, it is not so common in Palestine. 



The larvae prefer brackish water. 



A few adults were found at Haifa in June 1919. 



The night of 31st March 1920 was spent at Jisr 3l Damie, Jordan Valley. During 

 the evening we were attacked by clouds of mosquitos, but owing to an unfortunate 

 .accident to my supply of tubes, I was unable to bring back a large number of speci- 

 mens. A few of this species were secured, together with 0. detritus, Theobaldia 

 annvlata var., and Anopheles suj)erj>ictus. 



Ochlerotatus mariae, Serg. 



One of the few mosquitos to be found breeding in sea-water. Large numbers 

 of ova, larvae and pupae were found in pools above high water mark on the rocks 

 ^t Athlit, Palestine, in August 1920. In June and July 1919 larvae were abundant 

 in similar situations along the coast to the south-west of Beirut, Syria. The pools 

 become very salt owing to evaporation, and the temperature of the water, by 

 exposure to the sun, is usually well over 90° F. for the greater part of the day. 



The adults bite freely in the daytime, and cause much annoyance to people bathing 

 from the shore. 



Ochlerotatus detritus, Hal. {salinus, Fie). 



A very abundant and troublesome species in parts of Palestine during the wet 

 season and spring. 



The larvae are found chiefly in brackish water, near the coast, but I also found 

 them in large numbers in the Jordan valley at the end of March 1920, at 1,000 feet 

 below sea-level. 



Palestine : Zummarin ; Haifa ; Acre ; Jisr el Damie, Jordan. 



€ulex pipiens, L. 



Abundant and widely distributed in Egypt, Palestine and Syria, and found 

 as a rule near human dwellings. The species occurs from sea-level to 4,500 feet. 



