Among some insects recently sent for identification to the Imperial Bureau of Entomology by Mr. T. Bainbrigge Fletcher, Imperial Entomologist for India, and Dr. K. Dammerman, Government Entomologist for Java, there were four undescribed species of Curculionidae, all of which are recorded as attacking cultivated plants, though the extent of the injury inflicted is not indicated.

The history of but few insects can be compared with that of Pectinophora (Geleckia) gossypiella, which, having started as a minor pest in its native country and having been transported by human agency to a new country, has there suddenly leapt to the most important position as a major pest of the crop it attacks. In this respect it may be placed with the Phylloxera and the gipsy moth.

Although the chief object of this paper is to consider certain aspects of the damage done by the pink bollworm to the cotton crop, the following short summary of the established facts concerning the life-history of the insect may be useful to readers not familiar with its habits.

Food-Plants. The pink bollworm feeds on cotton (Gossypium, various species), okra (Hibiscus esculentus ; Arabic : bamia ; Hindustani : bhindi), Deccan hemp (Hibiscus cannabinus ; Arabic : til), hollyhock (Althaea rosea), mallow (Malva sp., probably silvestris), Thespesia populnea (fide Fullaway ; this record is considered doubtful by Busck), and Abutilon sp. (Arabic : hanbuk ; fide King).

It will be noticed that all these plants belong to the Malvaceae. The record for pomegranates given by Dudgeon and Gough is without doubt due to error.

Of all these food-plants cotton is preferred. The larvae attack the stems (feeding in the cambium and boring a tunnel which encircles the stem), flowers, flower-buds, bolls and seeds.

During six years medical work in the northern provinces of Nigeria I have caught and examined every morning all the mosquitos I could find in my own bungalow. I have done this with a view to finding out which are the common domestic species in this region of West Africa, and their seasonal variation throughout the year.

Les larves d'Oestrides qui font l&objet de la présente note ont été récoltées sur le continent africain et nous ont été soumises pour détermination par Monsieur Guy A. K. Marshall, Directeur du Bureau Impérial d'Entomologie de Londres. Elles appartiennent à quatre des sous-families auxquelles on rapporte les diptères que l'on convient de désigner communément sous le nom d'Oestrides : les Gasterophilinae, les Oestrinae, les Hypoderminae et les Cobboldiinae.

British Guiana has not been invaded by migratory locusts since the year 1886, when, as far as it is possible to ascertain from the records of those bygone days, the same species of locust was implicated. Also, on the occasion of this previous attack, it seems very probable that a swarm first infested the North West and Pomeroon areas and, multiplying there, migrated further down the coast to Berbice.