The previous paper on the nomenclature of Australian Tabanidae (Ferguson, 1924) was unfortunately despatched for publication long before Enderlein's paper “ Ein neues Tabaniden-system ” (Enderlein 1922) became available in Sydney. Hence certain alterations are necessary to statements which appear in my former paper.

Although, among the very numerous species of Diptera described by the late Dr. Hermann Loew, the types of not a few are stated to have been obtained in Asia Minor, nothing whatever relating directly to the Diptera of the dardanelles has hitherto appeared in print. A paper by Loew on a collection of Diptera made near Varna* is, however, worth bearing in mind in connection with any future work on the Dipterous fauna of the Dardanelles. The paper in question includes records of seven species of Tabanidae, some of which are among those mentioned in the following pages.

Over a quarter of a century has now elapsed since the genius of Ross convicted mosquitos of responsibility for the spread of malaria, but the factors involved in the distribution of the insects in Nature are hardly better understood to-day—when, in addition to filariasis and malaria, they have been inculpated in respect of the transmission of at least two other major diseases—than they were at the time of the original discovery of August 1897.

I am indebted to Dr. Guy A. K. Marshall for a small but important collection of Tachinid flies from the Federated Malay States, mostly parasites of insects of agricultural importance.

The writer had exceptional opportunities for studying sugar-cane moth borers while engaged as entomologist to one of the most progressive cane-growing concerns in British Guiana from September 1922 until January 1925. The observations and data that follow refer to some three thousand acres of typical cultivation situated on the west bank of the Berbice River, nearly opposite the town of New Amsterdam, in which locality the borer pest probably reaches its maximum in destructiveness.

In his recently published paper “ Diptera of Medical and Veterinary Importance, I—Types of Older Authors in Continental Museums ” (Philippine Journ. Sci., xxvii, 2, pp. 177–200, June 1925), Major W.S. Patton (loc. cit., p. 189), writing of Haematobia nudinervis, Stein (Ann. Mus. Nat. Hung., xvi, 1, p. 150, 30 August 1918), states that this is the species hitherto known as Bdellolarynx sanguinolentus, Austen ; and that, since “ nudinervis was described a year before sanguinolentus,” Stein's name for “ this common Oriental bloodsucking muscid …” must henceforth be adopted. On the question of priority, however, Major Patton is in error. The description of Bdellolarynx sanguinolentus (Ann. Mag. Nat. Hist. (8), iii, p. 290) appeared in March 1909—nine and a half years earlier than that of Haematobia nudinervis, so that the latter designation is antedated by a fairly wide margin.

The purpose of this paper is to present the more important features of the internal anatomy of a subterranean viviparous mealy-bug commonly found on the roots of clover in the eastern part of the United States. Only the female was studied, since the male has never been found. No attempt was made to present many of the details which were found to resemble homologous parts of the common oviparous mealy-bug, Pseudococcus citri, Risso, as described by Berlese in 1893.

The following paper deals with a collection of Thysanoptera from various tropical countries, but especially Africa, received by the author from the Imperial Bureau of Entomology for determination. As most of the species before me are from new localities or from new food-plants, I have thought it desirable to give the data not only for the new species, but for all the others also.

The cultivation of citrus trees in Palestine is by no means modern, for as far back as the tenth century A.D. the Arabs discovered the “ bitter orange ” in Northern India, and it was, in all probabllity, brought into this country shortly afterwards. Jacques de Vitry, who made a visit to Palestine in the 13th century, mentions several varieties of citrus.

In this paper the species of Aleyrodidae occurring in Ceylon are listed, and the descriptions of two genera and nineteen species new to science are included.

Most field entomologists studying Anophelines limit their collections of Anopheline larvae to those in the third and fourth instar, owing to the lack of success commonly encountered in rearing those in the earlier stages, and regard the rearing of adults from ova as more or less of a “ stunt,” success being so rare.

Since the appearance in the pages of this Journal in 1923 of the monograph above alluded to,* there has come to the attention of the author certain nomenclatorial changes, errors, additions and criticisms which seem to justify treatment in a supplementary fashion.

The present paper reports on a few Copeognatha received by the author for determination from the Imperial Bureau of Entomology, for which I am very much indebted to the kindness of the Director, Dr. Guy A. K. Marshall. Unfortunately all the specimens were dried and carded, so that it is impossible in some cases to give as full descriptions as are desirable for complete characterisation of the species, and as would have been done if there had been alcohol material at my disposal. Never-theless, it seems desirable to record all the species before me, as nothing has been known hitherto regarding the Copeognath fauna of the Fiji Islands.

If the destruction of the breeding-places of Aëdes argenteus (aegypti, fasciata) is carried out too completely, it is known that some of the females lay their eggs in abnormal places in which they would never oviposit if their peace of mind had not been very greatly disturbed. Carter has advocated placing pots of water on verandahs in order that the female mosquitos may follow their sexual instincts without perversion ; at the same time no breeding takes place, as the pots are emptied, dried and refilled once a week. A drawback to this method is that it must be done by a careful, methodical person or the pots may become breeding-places and larvae will adhere to the bottom of the pot and survive.

The antennae are eight-jointed, viz., scape, pedicel, two ring joints, and four in the club. The second ring joint is very minute, and as it lies practically within the base of the club, its presence is demonstrable only in slowly dehydrated preparations. The number of the major sensoria on the club segments is probably a generic character. In the ♀ this appears to be 1.1.2.3, and in the ♂ 1.1.1.2. The following details of chaetotaxy would also seem to be of generic value : mesoscutum with four stout bristles (one posterolaterally and one in front) ; one on parapside before the tegula and another on the invading portion of the axilla ; scutellum four bristles ; metanotum 2.2 (very minute) ; propodeon two (minute) behind the spiracle.

Described from two females bred from larvae by Lieut. K.A. Aarstad, at Kalabahi, Isle of Alor, Lesser Sunda Islands, Dutch East Indies.

This insect has been referred to in various publications of our Department under the name of Monophlebus stebbingi var. octocaudatus, Gr. It occurs every year at Pusa on many fruit trees, but is especially bad on peach, plum, mango, and jak (Artocarpus integrifolia, Linn.).

In connection with further experiments concerned with the significance of the pH of natural and other waters and the relative suitability or unsuitability to the development of the larvae of certain mosquito species, electric currents have been used to alter the pH readings, thus avoiding the necessity of adding extraneous acids or alkalis to bring about this alteration.

Experiments are reported on the effect of salinity on Anopheles larvae. It is shown that A. elutus, A. superpictus and A. sergenti show a decided selective capacity for egg-laying, depositing more than 75 per cent, of their layings in fresh water or water of low saline content. It is also shown that salt concentrations of M/4 and higher are toxic to these eggs and larvae. In so far as reaction is concerned a slightly acid reaction (pH 6·6 to 6·8) favours more active development, although larvae will develop in alkaline solutions. The reaction of the medium also seems to modify the effect of the salinity. In an alkaline substrate M/8 salt solution is more favourable than lower salt concentrations, whereas in acid substrates the reverse seems to be the case.