Ill 



the south-east of this hue. On the acquisition of the basin of the 

 Upper Sangha by Germany in 1911, fears were entertained for the 

 reinfection of the old colony, since a centre of infection had been shown 

 to exist in the new territory. As a result, the struggle against sleeping 

 sickness received a new impulse ; the new territories were declared 

 contaminated and the recruiting of carriers or native labourers in the 

 old colony for the Upper Sangha was forbidden. A commission was 

 appointed in 1913 and carried out the following measures :■ — (1) The 

 injection of persons in infected villages with atoxyl, arseno-beuzol, etc. ; 

 (2) the formation of clearings in the neighbourhood of infected dis- 

 tricts ; (3) the prohibition of passage from infected areas without 

 special permission ; this rule was rigorously enforced in the Aba- 

 Berberati-Bula triangle, where the disease was very prevalent. The 

 outbreak of war has resulted in the movement of natives and troops 

 throughout the region, thus reversing the last regulation. 



Sheep Lice. — Internat. Rev. Sci. & Pracf. Agric, Rom?, vii, no. 1, 

 January 1916, p. 101. [Abstract from The Pastoral Review, 

 Melbourne, xxv, no. 9, 16th September 1915, pp. 854-855, figs.] 

 Keceived 2nd May 1916.] 



Sheep hce belong to the following species :■ — Haemafopinus ovilkis, 

 H. pedalis {H. macrocephalus), found in the United States and TricJio- 

 dectes sphaerocephalus. The first named was discovered in New 

 Zealand in 1906 ; the second was reported for the first time in 

 Australasia in the South Island, New Zealand. As insecticidal sheep 

 dips have been used for a long time in New Zealand, these insects have 

 not caused much injury. These two species suck blood from their 

 host, causing weakness and reduced production of wool. T. sphaeroce- 

 phalus is still more injurious, it does not suck but feeds on the epide; mis 

 and on the wool. It is so prolific that in a short time one ram bearing 

 lice will infect a whole flock. On account of the drought in 1915, the 

 Australian shepherds were compelled to graze their flocks even in the 

 lice-infected districts and to mix immune with infected flocks, which 

 has caused a rapid spread of the parasite. The loss of wool due to lice 

 in South Australia was estimated to amount to £100,000 in 1914 and 

 to a much greater sum in 1915, in which year the parasite occurred 

 over a much larger area than in preceding years. The ova of the lice, 

 being surrounded by a fatty matter, are not reached by insecticides, 

 hence the necessity for two dips ; one after shearing, and the other 

 within sixty days, that is, before the hce hatched from the ova which 

 survived the first dip, begin to oviposit. Dips containing poisons 

 are considered by Mr. F. H. Williams to be the only ones which are 

 effective in protecting sheep against infection. 



r Macfie (J. W. S.) & Ingram (A.). New Culicine Larvae from the 

 l:^ Gold Co£ist.~~Bull Entom. Research, London, vii, no. 1, Mav 1916, 



pp. 1-18, 14 figs. 



The mosquito larvae described and figured in this paper were collected 

 at Accra and at Sunyani in Ashanti. Larvae of Stegomyia mefcdlica^ 

 Edw., were found in clear but dark brown water in the hollow of a tree. 

 Specimens of Culiciomyia Jiehidosa and S. unilineata were also present. 



