68 



Theo., A. pulcherrimiis, Theo., A. hyrcanus, Pall, {sinensis, Wied.), 

 A. macnlatus, Theo., A. fidiginosus, Giles, A. vagus, T)6n., Rachionoto- 

 myia aranoides, Theo., Cnlex fatigans, Wied., Aedes argenteus, Poiret 

 {Stegomyia fasciata, F.), and A. (5.) albopictus, Skuse. 



Howard (L. O.). Report [1920-21] of the Entomologist.— U.S. Dept. 

 Agric, Bur. Ent., Washington, D.C., 1st x^ugust 1921, 33 pp. 

 [Received 24th January 1922.] 



In the section of this report deahng with insects affecting the health 

 of man and domestic animals it is stated that attention was given to 

 flies and other insects in meat-packing establishments. A marked 

 improvement in fly conditions has taken place there since 1915, when 

 the work was begun. Screw-worms [Cochliomyia maceUaria] were 

 the subject of further study on the same lines as previously reported 

 [R.A.E., B, ix, 50], special stress being laid on their destruction 

 under range conditions. In Texas a material reduction is reported in 

 screw-worm cases since fly-trapping began. Experiments to test the 

 toxicity of various chemicals to ox-warble [ Hypoderma] larvae resulted 

 in the discovery of a very effective ointment, consisting of a mixture 

 of iodine and vaseline. A 100 per cent, destruction of the common 

 species, Hypoderma lineatum, can be secured by pressing this ointment 

 into the warble-holes in the backs of cattle. The work against poultry 

 parasites has been more or less along the line of securing the adoption 

 of tested measures already published. 



Langeron (M.). Deuxi^me Mission parasitologique en Tunisie, Tamerza 



(Septembre-Oetobre 1919). — Arch. Inst. Pasteur Afr. Nord, Tunis, 

 \, no. 4, December 1921, pp. 347-382, 10 figs. 



The mountain oases studied lie between the steppes of central Tunisia 

 and the Sahara proper. Only two Anophelines were observed. 

 Anopheles hispaniola, Theo., and A. ctdicifacies , Giles. Though 

 common, they were not troublesome, as horses, rabbits and fowls were 

 present. 



The Culicines were Theobald ia longiareolata,Ma.cc[., Culex laticinctus, 

 'Edw., C. apicalis, Adams, C. pipiens, L., and Uranotaenia unguiculata, 

 Edw. (larva only). Culicine larvae only develop in water of some 

 depth, whereas Anophelines can exist in much shallower waters. 

 Such waters may cover the sand with a thin sheet more like a sandy, 

 semi-fluid paste than a liquid. Anopheline larvae and pupae can resist 

 strong currents and prevent themselves from being drawn down by 

 the water sinking into the sand. They feed on diatoms, and may also 

 be predatory. Chara spp. seem to exercise an influence unfavourable 

 to mosquito larvae only if very abundant IR.A.E., B, viii, 61]. 



In the author's opinion the larva of a mosquito is a highly specialised 

 organism, and larval characters should be taken into consideration in 

 identification and classification. A discussion of such characters 

 is given for the Anophehnes mentioned above, and for A. multicolor, 

 Camb., taken by the author at Tozeur, in the southern Djerid region 

 in 1911. 



Of the four sand-flies taken in houses, Phlebotomus minntus, Rond., 

 was by far the most abundant. The others were P. fallax. Parr., 



