139 



per annum. Prophylactic treatments suggested include the use of 

 coverings for the animals, ear-pieces, nets, etc. ; hanging bunches of 

 twigs, fern, willow, etc. in the stables and burning these when the 

 flies are sheltering in them ; and the application of lotions such as a 

 decoction of walnut leaves, a pulp of squashed oak bark soaked in 

 vinegar, or infusions of such nauseous substances as asafoetida (3 per 

 cent.), aloes (5 permille), tobacco (100 per mille), cade (juniper) oil, 

 or cod-liver oil. The usual method of extracting the larvae from 

 the skin of the animals is described. 



Ghosh (E.). On a New Ciliate, Balantidinm hiattarum, sp. nov., Intes- 

 tinal Parasite in the Common Cockroach [Blatta americana). 



— Parasitology, Cambridge, xiv, no. 1, April 1922, pp. 15-16, 1 fig. 



Balantidiwn hiattarum, sp. n., was found in the intestinal contents 

 of Blatta americana at Calcutta. It is comparatively^ rare and was 

 only noticed twice. It is apparently the first species of the genus 

 described from the intestinal tract of an Arthropod. 



CuNLiFFE (N). Some Observations on the Biology and Structure of 



Ornithodorns savignvi, Audouin. — Parasitology, Cambridge, xiv, 

 no. 1, April 1922,'pp. 17-26, 3 figs. 

 The technique employed throughout these observations was the 

 same as in previous experiments [R.A.E., B, x, 25]. The biology 

 of Ornithodorns savignyi, Aud., as studied under laboratory conditions, 

 proves to be very similar to that of 0. moubata, Murr. Females may lay 

 over 400 eggs, of which at least 60 per cent, ma}' be fertile ; partheno- 

 genesis has not been observed. An increase in temperature of 8' C. 

 [14° F.] from 22° C. [72° F.] decreases the longevity of the female 

 from 775 to 358 da\'s {i.e., 45 per cent). An increase of 7° C. [13° F.] 

 from 30° C. [86° F.] reduces the period for the production of third-stage 

 nymphs by 26 per cent. An excess of moisture apparently reduces 

 the vitality of the individual at each stage of growth, this being most 

 marked after the third nj'mphal stage has been attained. The changes 

 in external anatomy occiirring during development are also similar 

 to those of 0. moubata. 



Ai.LEx (J. A.) & WicKWARE (A. B.). A prehminary Note on Parasites 

 infesting domesticated Silver Black Foxes in Canada. — Parasito- 

 logy, Cambridge, xiv, no. 1, April 1922, pp. 27-28. 

 The parasites recorded include Ctenocephalns canis, Curt., and Sar- 



coptes scabiei viilpis, Fiirst., from the body of the host, and Otodectes 



cynotis, Hering, frorn the external meatus of the ears. [See also 



R.A.E., B, ix, 96.1 



Bezzi (M.). On the Dipterous Genera, Passeromyia and Omithomusca, 

 with Notes and Bibliography on the Non-pupiparous Myiodaria 

 Parasitic on Birds. — Parasitology, Cambridge, xiv, no. 1, April 

 1922, pp. 29-46. 



The author's conclusions to this paper are as follows : — The flies 

 associated with birds show a parallelism between the grades of their 

 parasitic adaptation and their systematic position. 



The lower forms (Acalyptrata) have saprophagous larvae, living in 

 the nests of several orders of birds : Scansores, Passeres and Raptores. 

 In the larval stage they feed upon decaying organic matter, while in 

 the adult stage they are, in some cases, blood-sucking {Camus). 



