This report, which is of a preliminary nature, deals with the species of Culicidae met with in Macedonia by the British Malaria Commission during the latter half, of 1917. The collections of the Commission have been augmented by material forwarded from time to time to the Malaria Enquiry Laboratory, Salonika, by various Medical Officers and others in the field. While engaged in working out these and other blood-sucking Arthropods, I had the privilege of examining, through the kindness of Dr. Joyeux, of the Mission Antipaludique, samples of species taken within the areas under French control. As our reports are to appear almost simultaneously, and as my colleague has devoted special attention to the larval morphology of these insects, I have confined myself here mainly to the adults, and field notes. I desire to thank heartily the following officers for material and notes supplied—Majors Bissett and Armour; Captains Boyd, Candler, Peacock and Carnwath. I have also been indebted in many ways to the kindness of Lt.-Col. C. M. Wenyon, O.C. the Malaria Enquiry Laboratory. For the work of identification the Trustees of the British Museum (Nat. Hist.) have afforded every facility, and in this connection my best thanks are due to Mr. Lang of the Museum Staff. Again, as on many another occasion, it is a pleasure to acknowledge the assistance ungrudgingly rendered by Dr. G. A. K. Marshall, Director, Imperial Bureau of Entomology.

This genus was recently described by Dr. Speiser and is a very characteristic one, on account of its elongate and slender body and bare 3rd longitudinal vein. The species belonging here, as long ago pointed out by Loew, have a great resemblance to those of the genus Elaphromyia, but they are at once distinguished by the thin and black occipital row, by the pointed lower angle of the anal cell and by the non-reticulate wing pattern. The genus is evidently allied to Ocneros, but has nothing to do with Rioxa. I will give here some additional details to the short description of Dr. Speiser

A collection of Indian Tachinid flies was received some time ago through the kindness of Dr. A. D. Imms. An examination has shown that most of the specimens are new, and these are described forthwith. In the use of genera a conservative course has been adopted, and the new species have been placed for the time being at least in genera already in use.

The type specimens have been deposited for the present in the National Collection of Insects maintained by the Entomological Branch of the Department of Agriculture at Ottawa.

The two species of thrips described in the following pages have been found on tea in sufficient numbers as to be regarded as pests, and they should therefore be made known to economic biologists. A member of the sub-order Tubulifera (Haplothrips sp.) was also found both by Prof. Maxwell Lefroy and Mr. Andrews on tea, but it seems to occur also on other plants; I have not yet had the opportunity of studying it.

P. lefroyi is a strongly characterised species both in structure and coloration; whilst P. setiventris, when both sexes are taken, should be easily recognised by the black “ tail ” of the ♂. The former species may ultimately be removed from the genus Physothrips, with advantage.

The rubber thrips deserves to be more widely known, not only on account of its economic importance, but because it forms the type of a small group of the genus Physothrips, separated at once by the structure of the sternites 3 to 7 in the ♂. In some species the sternites are simple, but in most they are characterised by one well-formed and defined thinly chitinised area in the centre of each, either round, transverse or oviform, generally largish but sometimes reduced to a small puncture-like depression. These male features are found also in other genera. In P. funtumiae and its allies however the sternites 3 to 7 have numerous, usually irregular, depressions, smaller or greater, arranged in 2 to 4 more or less regular or defined, transverse rows. In one species (P. funtumiae) the anterior row of areas is characterised by the possession of a long, transverse, median area; but this is occasionally broken up to a greater or less degree.

Lycidocoris, Reut. & Popp., Trans. Ent. Soc. Lond., 1911, p. 409; Popp., Acta Soc. Scient. Fenn., xli, p. 182 (1912).

When studying the injurious insects of a plant it is, as a rule, easy when several insects occur together to isolate them and breed them separately in order to ascertain their parasites. In some instances, however, this method is unworkable, and this applies particularly to the often very complicated fauna of the cones of the coniferous trees.

Three species of Braconidae have now been bred in Demerara from the larva of the cane-boring moth, Diatraea saccharalis: Ipobracon grenadensis, Ashm., which I have previously mentioned (Ann. Mag. N.H. (8) xx, 1917, p. 244), and Ipobracon saccharalis, sp. n., both of which belong to the subfamily Braconinae; and Microdus diatraeae, sp. n., which belongs to the subfamily Agathinae.

In the course of an investigation into the froghoppers (Cercopidae) of the genus Tomaspis found on sugar-cane in Trinidad and the neighbouring countries, made on behalf of the Government of Trinidad, I visited Grenada in December 1916 and spent a few days investigating a small but severe outbreak of froghoppers in that Island. The following notes seem of sufficient interest to be published without further delay.