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RECORD OFFICE, LONDON ALLY WITHOUT PERMISSION OF THE BE REPRODUCED PHOTOGRAPHIC- COPYRIGHT PHOTOGRAPH-NOT TO!

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Enclosure 3 in No. 2.

IENT OF MEDICAL AND GENERAL ECONOMIC ENTOMOLOGY.

1st November, 1920.

honour to submit a report on the work done by the members of the rtment for the half-year 1st May to 31st October, 1920.

Lectures and Demonstrations.

of instruction is being given to the twelve students attending this Autumn term for the Diploma in Tropical Medicine. A special ng given to the thirteen veterinary students attending the post- a Veterinary Parasitology for the Diploma in Veterinary Hygiene. es were also given to the undergraduates in the Zoology Depart-

J. Dewhurst, of the Training College, Accra, at the request of the

RESEARCH.

Royal Society Grain Pests (War) Committee.

gation was brought to a close in September, and a final report Royal Society for publication (see below).

Breeding-places of Anopheles Plumbeus.

ition into the bionomics of this mosquito was undertaken by d Mr. Carter, with special reference to its breeding-places in the Details of the results of the work done are given below under

3.

Ship-borne Mosquitoes.

of the Ministry of Health, an inquiry was undertaken into the squitoes in ships arriving in Liverpool from West African ports. work is in course of preparation.

Rat-Flea Investigation.

gation was undertaken by Professor Newstead and Miss Evans in the Port Sanitary Authorities, the object being to determine the he various species of fleas occurring on rats in the Port and City h special reference to those species responsible for the transmission it to rat and from rat to man. A preliminary report was submitted

Ceratopogonine Midges from the Gold Coast.

J. W. S. Macfie returned from West Africa with a large collection ed, or bred by himself and Dr. Ingram, during December, 1919, to stematic work was commenced by Mr. Carter and Dr. Macfie, the to Accra in October. The work also included a detailed study of phology of the adults and early stages. Results of this research I in the Annals. The thanks of the Department are due to

is gift of a special cabinet for this collection of midges.

12

Research on Phlebotominæ.

In September, Major J. A. Sinton, V.C., I.M.S., worked with Professor Newstead and Miss Evans in the study of a large collection of Phlebotomino made himself in the north-west province of India. Results of this research will appear in the Annals.

Identification of Insects.

Collections of insects were received for determination as follows:-

Glossina (367 specimens), from Dr. Schouteden, Belgian Congo Museum. Psychodida, from Major W. F. M. Loughnam, R.A.M.C., Kingston, Jamaica. Acarids, from Captain A. W. N. Pillers.

Publications.

Newstead, R., and Morris, H. M.-Bionomic, morphological and economic report on the acarids of stored grain and flour: Part II. Roy. Soc., Reports of Grain Pests (War) Committee, No. 8.

It was found that wheat and flour are liable, during transit and in storage, to attacks and injury by acarids, of which Aleurobius farine was most commonly encountered. It was established that mites will not injure wheat and flour in which the moisture content is eleven per cent, or under, whatever the temperature may be.. The morphology and hionomics of the infesting mites were studied, and experí- ments carried out with regard to methods of destruction.

Newstead, R., and Morris, H. M.-Report on the non-parasitic or forage mites; with an appendix by W N. Pillers: Clinical notes on the non-parasitic or forage mites. Roy. Soc., Reports of Grain Pests (War) Committee, No. 8. An account of the family Tyroglyphide, with clinical notes derived from veterinary experience.

Blacklock, B., and Carter, H. F. On the results obtained from surveys for breed- ing places of tree-hole mosquitoes in Liverpool and neighbourhood. Ann. Trop. Med, and Parasit. Vol. XIV, p. 115.

(1) In a series of six surveys, five in the Liverpool district and one in Delamere Forest, Cheshire, two thousand five hundred trees were examined up to a height of twenty-five feet for breeding-places of Anopheles plumbeus and Ochlerotatus geniculatus.

(2) A total of eighty-three holes and fifty one forks and clefts containing water were found.

(3) Sixteen breeding-places of A. plumbeus and nineteen breeding-places of 0. geniculatus were discovered; larvæ of A. plumbeus and . geniculatus were associated on thirteen occasions. Breeding-places of A. plimbeus occurred in 064 per cent. of the trees examined, and in 19-2 per cent. of holes containing water. (4) Up to a height of six feet from the ground, thirty-nine places containing water, four breeding-places of A. plumbeus and six of 0. geniculatus were found; above six feet, ninety-five places containing water, twelve breeding-places of A. plumbeus, and thirteen of O geniculatus were found.

(5) Elms, horse-chestnuts, and sycamores provided the great majority of the breeding places; oaks, Spanish chestnuts and firs provided no breeding-places and very few holes containing water.

I have, &c.,

ROBERT NEWSTEAD, Professor of Entomology.

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1st May, 1921. I HAVE the honour to submit a report on the work done by the members of the staff of this Department for the half-year 1st November, 1920, to 30th April,-

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1921.

Lectures and Demonstrations:

A full course of instruction was given to the eight students attending this School during the Lent term for the Diploma in Tropical Medicine. A special course was also given to the ten veterinary students attending the post-graduate course in Veterinary Parasitology for the Diploma in Veterinary Hygiene.

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