140 



Edwards (F. W.). On the British Species of Sirmdium. — i. The 

 Adults. — Bull. Entom. Research, London, vi, 1st June 1915, 

 pp. 23-42, 6 figs. 



The genus Simulium is important on account of the blood-sucking 

 habits of some of its members and the supposed connection between 

 these and pellagra. After giving an account of the general morphology 

 of the genus, the author describes in detail the British species. 



S. ornatum, Mg,, is common wherever running water is available. 

 The dates of capture range more or less continuously from the 13th 

 March to 20th August. It is doubtful whether this species is a blood- 

 sucker. S. reptons, L., is a troublesome blood-sucking form, occurring 

 abundantly in the Abernethy forest in June and July. S. tvberoswn, 

 Lndst., has similar habits and appears to increase rapidly year by 

 year. S. argyreatum, Mg., appears from April to June and again in 

 August. It is a habitual blood-sucker, and it is noteworthy that 

 in the localities in which it has been recorded no running water is 

 present. S. eguinum, L., has been frequently found on horses, causing 

 ulceration of the ears. It appears to have the same habits outside 

 Britain. The eggs of this species are deposited under water on the 

 submerged parts of plants. *S. hirti'pes, Fries, is reported to have 

 blood-sucking habits. S. variegatum, Mg., is confined to comparatively 

 high altitudes, where to a large extent it replaces S. ornatum. 

 S. morsUnns. sp. n., occurs from April to August. It is a blood-sucker 

 and is found in the South of England and in Scotland. The dates of 

 capture of S. austeni, sp. n., range from 23rd April to 22nd May. 

 >,S;." laiipefi, Mg., appears from early April until the beginning of 

 September, being most abundant in April and Mav. The males have 

 been taken hovering in clouds in the shade. The absence of anv 

 records of its biting would seem to prove that it is not a blood-sucker. 

 Specimens of S. aureum, Fries, have been captured from 31st March 

 to both August; its habits are probably identical with those of 

 S. latrpes. The time of appearance of S. ongustipes, sp. n., is from 

 March to October. It is mainly a lowland or coast species, often 

 associated with S. lafipes, which it probably ressmbles in habit. 

 S. suhcxcisum, sp. n., is found from April to June ; it is widely 

 distributed in England and Scotlajid, though scarce in any one 

 locality. 



Hirst (S.). On a widely distributed Gamasid Mite {LeiognatJius morsi- 



tans, sp. n.), parasitic on the domestic Fowl. — Bull. Entom. 



Research, London, vi, 1st June 1915, pp. 55-58, 3 figs. 



Leiognathus morsilam. sp. n., has a wide distribution in Africa^ 



and is found also in Mauritius, China, India and South America. 



This parasite probably transmits spirochaetosis. Instances of this 



mite attacking man are recorded from Zanzibar and India. Descriptions 



of the adults of both sexes and of the protonymph are given. 



Lamborn (W. a.), a Preliminary Report on the Problem of Control- 

 ling Glossina in Nyasaland.— £mW. Entom. Research, London, vi, 

 1st June 1915, pp. 59-65, 3 tables. 

 The first aim of the author was to discover a small isolated fly area 



or primary fly centre, with a view to carrying out experiments in the 



