35 



various species of the genus Culex by means of the male genitalia 

 and for the determination of the larvae by easily visible characters. 



The species dealt with in these keys are the following -.-^Anopheles 

 bifurcatus, L., which is apparently one of the very worst malaria 

 carriers ; A. turkhudi, List., which is the commonest malaria carrier, 

 being particularly abundant in oases and in drains with salty water ; 

 A. palestinensis, Theo., wliich may perhaps be found to be identical 

 with A. sergeiiti ; A. mauritianus, Grp., which is not regarded as a 

 malaria carrier ; A. pharoensis, Theo., which is probably the most 

 \videly-distributed Anopheline in Egypt, but a doubtful malaria 

 carrier, and is frequently found accompanying Culex invidiosus and 

 C. decens : Siegomyia fasciata, F. (yellow fever mosquito), which is 

 not very abundant in Egypt, but quickly appears in vessels of water 

 left standing in houses ; Ochlerofatus caspius, Pall, {dorsalis, auctt.), 

 which occurs in salty swamps and stagnant pools and v^ one of the 

 commonest mosquitos of Egypt ; 0. longisquamosus, Theo., which 

 greatly resembles 0. caspius and may be only a local variety of it ; 

 O. nemorosus, Meig., which is recorded from two localities only; 

 Theohaldia longiareolata, Macq., chiefly found in the winter in the adult 

 form, the larvae usually occurring in stagnant puddles ; this species 

 rarely bites human beings ; Culex quasigelidus, Theo., which is widely 

 distributed, but not numerous ; C. tipuliformis, Theo. {theileri, Theo.), 

 common about oases ; C. pusillus, Macq, ; C. pipiens, L., which 

 constitutes the great majority of mosquitos taken in Egyptian houses, 

 and is very common in cesspools and also in comparatively pure water ; 

 C. invidiosus, Theo., which is the commonest mosquito in infiltration 

 water, stagnant canals and drains, etc. ; C. decens, Theo., which may 

 be only a variety of C. invidiosus, and may also be synonymous with 

 C. paliidocephalus, Theo. ; an unidentified species of Culex which 

 is new to Africa and probably new to science ; Uranotaenia unguiculata, 

 Edw., which has not previously been recorded from Egypt, but is 

 widely distributed and often abundant, especially in permanent 

 pools and in infiltration water. 



Other species recorded from Egypt by other writers, but considered 

 as of doubtful identity by the author of the present paper, include 

 Anopheles maculipennis, Meig., A. squamosus, Theo., Stegomyia 

 sugens, Wied., and Culex fatigans, Wied. 



EwiNG (H. E.). Stable-flies and Chiggers. — Jl. Econ. Entom., Concord, 

 N. H., xii, no. 6, December 1919, p. 466. 



Tromhtdium striaticeps, Oud., which is one of the three mites in 

 Europe that attack man and domesticated animals, is reported from 

 Washington, D. C, as infesting Stomoxys calcitrans. 



Barber (G. W.). A Note on Migration of Larvae of the House Fly. — 

 Jl. Econ. Entom., Concord, N. H., xii, no. 6, December 1919, 

 p. 466. 



Attention is drawn to the migration of a number of larvae of Musca 

 domestica, which were observed to travel a distance of from 1 to 150 

 feet rather than pupate in the earth under the manure in which they 

 were breeding. ..4'\\VsunTtf"'iir/?;^v 



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