128 



Mann (W. M.)- A Cursorial Tick. — Psyche, Boston, Mass., xxii, no. 2, 

 April 1915, p. 60. 



While travelling in the Sinaitic Peninsula and Arabia Petraea, in 

 1914, the author observed examples of Hyalomma aegyptium, L., living 

 in hummocks formed by sand at the base of the scrubby bushes which 

 mainly comprise the sparse vegetation. By stamping on the ground 

 in the vicinity, they could be induced to emerge and travel at a rapid 

 pace towards the observer. 



EwiNG (H. E.) & Stover (A. J.). New Parasitic Mites (Acarina). — 

 Entom. News, Philadelphia, xxvi, no. 3, March 1915, pp. 109-114,. 

 1 plate. 



The following new species of parasitic mites are described :— 

 Haemogamasus sanguineus on Mus rattus, Liponyssus spiniger on the 

 musk-rat, L. crosbyi on Vesper subulatus, and Proctophyllodes trisetosus 

 on the meadow lark, Sturnella magna. 



/\ HoRNiG (H.). Mosquito Extermination Work in Philadelphia, Pa.— 



■^ Entom. News, Philadelphia, xxVi, no. 3, March 1915, pp. 123-125. 



During the summer of 1912, work in connection with mosquito 

 extermination was begun in the southern part of the city, where 

 numerous neglected waterways had become overgrown with vegetation. 

 The removal of reeds, etc., the constant oiUng of ditches and filling 

 in of waterholes gave extremely good results. In 1913, extermination 

 work was extended over the whole city. In addition to the dehvering 

 of lectures on the life-history of the mosquito, the examination of 

 water-holding receptacles, surface drains and pools was carried on. 

 Sewers were found to furnish a supply of mosquitos from July to 

 November, while breeding in the open air did not continue after 

 October. The temperature of the sewers, 6 feet below the surface, 

 was from 12°-20° higher than that of the outer air. In 1914, exter- 

 mination work was conducted by the Bureau of Highways. The most 

 efficient work accompUshed was the oiling of sewer inlets. An out- 

 break was observed four weeks after the heavy rain in May 1914. 

 Tanks and fire-buckets in hotels and factories were responsible for 

 infestations in the residential sections. Large colonies of Cidex jnpiens 

 were found in several creeks receiving sewerage ; such places were 

 cleared and a better flow of water estabhshed. In the southern part 

 of the city a chemical factory discharging waste water into meadows 

 favoured the breeding of salt-marsh species. Larvae of Ochlerotatus 

 (Aedes) sollicitans, 0. taeniorhynchus, 0. sylvestris and Psorophora 

 ciliata were abundant. A few specimens of Ochlerotatus jamaicensis, 

 0. triseriatus, 0. canadensis, Culex restuans, C. salinarius and Taenior- 

 hynchus {Coqiiellittidia) perturhans were found. Anopheles punctipennis 

 occurred in meadows and near stables, often breeding in the same 

 places as Culex pipiens. 



