1. In this paper five species of Simulium and 16 species of Austrosimulium are dealt with.

2. The new genus Austrosimulium differs mainly from the former in the number of joints in the antennae, which are ten instead of eleven; it seems to be restricted to the Indo-Australian region.

3. In many cases the species of Austrosimulium cannot be differentiated from each other in the adult stage, although they are perfectly different in their early stages and especially in the pupal stage.

4. Seven species of Austrosimulium occur in New Zealand: A. vexans, Mik, A. ungulatum, sp. n., A. australense, Schin., A. tillyardi, sp. n., A. longicorne, sp. n., A. multicorne, sp. n., A. laticorne, sp. n. Only the first two of these are distinguishable from the others in the adult stage; the remainder can only be differentiated in the pupal stage or the late larval stage.

5. Five out of these seven New Zealand species are known in their early stages.

6. In Australia (including Tasmania) five species of Simulium and nine of Austrosimulium are known to the writer, i.e.: S. aurantiacum, sp. n., S. fergusoni, sp. n., S. ornatipes, Skuse, S. umbratorum, sp. n., S. terebrans, sp. n., A. crassipes, sp. n., A. cornutum, sp. n., A. tasmaniense, sp. n., A. victoriae, Roub., A. furiosum, Skuse, A. bancrofti, Taylor, A. torrentium, sp. n., A. simile, sp. n., A. weindorferi, sp. n.

The two species A. victoriae, Roub., and A. furiosum, Skuse, have not been identified with certainty, so that further investigation may show that one or two of the new species are synonymous with them.

7. The early stages of one species of Simulium and five of Austrosimulium from Australia are here described.

In my recent revision of the mosquitos of the Australasian region the following species were mentioned as occurring in the Solomon Islands, the specimens having been for the most part collected by Dr. A. G. Carment:

Anopheles (Myzomyia) punctulatus, Dön.

In September 1923 I was asked by Dr. C. M. Wenyon to undertake the breeding of the tick, Ornithodorus moubata, female specimens of which were sent to the Wellcome Bureau by Dr. Kelesberger from the Belgian Congo. This gave me an opportunity of carrying out a series of experimental investigations on the biology of the tick which were continued till August 1924. The results obtained from the subject of this paper

About two months ago there was begun, under the auspices of the University of California Citrus Experiment Station, the task of monographing, as adequately as possible, the Citrus Coccidae of the world. Obviously, the scope of such an undertaking is such that an enormous amount of laborious work is required in the compilation and synthesis of scattered and partially “buried” scraps of recorded data. Even this collated information will not meet the requirements of our problem. This is particularly the case as regards geographical distribution, alternate and preferred hosts, and proper correlation of the data of distribution and damage with that of the geographical distribution and economic status of Citrus itself.

Length of body (one male), 2·3 mm.; length of wing, 1·6mm.; greatest breadth of wing, 0·5 to 0·6 mm. A large, dark brown species resembling C. nigripennis, C.I. & M.

Some time ago Mr. T. J. Anderson, Government Entomologist, Kenya Colony, sent to the Imperial Bureau of Entomology several specimens of a Drepanid moth, the larvae of which were defoliating coffee during 1922. The moth, which is described below, proved to be a new one, and I have described at the same time another species from Northern Nigeria, and have given figures of the male genitalia of both species, and of the wing venation (fig. 1) and male genitalia (fig. 2) of the genotype, Metadrepana glauca, Hmpsn.

The interesting moth described below was bred from larvae which were causing serious damage to pine trees in Cyprus, by the Entomologist to the Department of Agriculture in Cyprus, Mr. D. S. Wilkinson, who has presented to the British Museum (Natural History), through the Imperial Bureau of Entomology, the two males which he bred.

Most of the early stages described below were previously unknown, and as Aëdes variegatus, Dol. (Stegomyia pseudoscutellaris, Theo.) is of great importance in preventive medicine, it seems best to publish these notes and figures at once.

The attempt to effect the control of insect pests by the introduction of other insects parasitic elsewhere on members of the same or allied genera, and their propagation in the laboratory on their new host until sufficient numbers for field distribution have been obtained, represents a recent and highly important development of Applied Entomological Science. In this connection may be instanced the introduction into Hawaii of parasites destructive to the sugar-cane leafhopper; the introduction of the Scoliid Tiphia parallela, Smith, from Barbados into Mauritius for the control of the Melolonthid Lachnosterna (Phytalus) smithi, Arrow, a sugar-cane pest; the importation into the U.S.A. of Chalcid, Tachinid, and other parasites of the gipsy and brown-tail moths; and the recent despatch to New Zealand of Tachinid files destructive in England to Forficulidae.