Every student of entomology is familiar with the remarkable sexual dimorphism displayed by simuliid flies. There are not only striking differences in the coloration of the sexes, but also numerous morphological ones, as the different shape of the thorax, the different form of the claws, of the mouth organs, and especially of the eyes, which, dichoptic in the female, are holoptic in the male and are here sharply divided into an upper part with large facets and a lower strongly pigmented part with small ones.

On a recent visit to Cambridge I was permitted, through the courtesy of the Museum authorities, to examine the types of Chambers' numerous Coleophorid species deposited in this institution and to make genitalic slides of the material. This study has enabled me to clear up a number of doubts which have existed regarding the identity of certain of the species and, I hope, will put our knowledge of the group on a sounder basis than heretofore.

Length 11.3 mm. Black, the head and pronotum feebly but distinctly bronzed. the elytra with feeble bronze and coppery reflections. Head behind the eyes finely, not closely punctate from side to side as in julii Lec.

The following notes deal with three species in the genera Spudastica, Echthronomas and Campoctonus, and are based on material in the National Collection, supplemented by specimens loaned from the United States National Museum and the personal collection of Dr. H. K. Townes, to whom I am especially indebted for providing me with this additional material.

Banks distinguished Cressochilus from other genera by its having a somewhat acute marginal cell and the apical margin of the clypeus biconcave. In the females the biconcave margin of the clypeus may be very weakly indicated, but in the males it is usually stronger, there being often a well-marked median tooth.

The rapid development of scientific and practical work on parasitice and predaceous insects during recent years has created a need for a work of reference indicating the host relations of the entomophagous and providing in a convenient form a bibliography of the subject.

The following Canadian records of fleas occurring north of the 60th parallel have resulted from a recent study by the writer of the Siphonaptera contained in the Canadian National Collection at Ottawa. Most of the material dealt with here was collected by C. H. D. Clarke of the Bureau of Northwest Territories and Yukon Affairs, or by various officers of the Royal Canadian Mounted Police during the survey of the Thelon Game Sanctuary.

Male. Head, thorax and abdomen black, covered with long silvery-grey, hair-like vestiture; antennae greyish-brown, strongly bipectinate and composed of eighteen joints; fore tibia without epiphysis; wings uniformly smoky, without markings and sparsely covered with short pile; fore wing with area adjacent to outer side of the upper part of the discal cell sunken, causing this to appear as an elongate, obscure discal spot; costal and outer margins of all wings darker; fringes light grey. Expanse: 19 mm.

The insects of the genus Melanolophia are forest insects in Canada, the larvae feeding on both coniferous and deciduous trees. McDunnough, in his bulletin discusses five species, three of which are found in Canada.

As our knowledge of the larvae increases, the fundamental differences between Agriotes Eschscholtz and Dalopius Eschscholtz become more apparent. However, the larval characters hitherto used to separate the genera are now known to be quite inadequate.

In my original description of the above species I rather doubtfully associated with the male holotype and paratypes two females, largely on account of similarity of locality data; the genitalia of one of these was figured on Plate III, fig. 6. I now find that this association was incorrect and that the name quadruplex must be restricted to the male sex of the original description.

The conspicuously colored larva of Cucullia asteroides Gn. is commonly seen feeding on the flowers of autumn Compositae. Numerous descriptions of the color pattern of this species are recorded. To complete these, the setal arrangement and other distinguishing structural features are described below.

This is one of a series of papers on the insect life of the Big Bend Region of Trans-Pecos, Texas, in which the author plans to present a fairly complete picture of the insect and animal life of that little known region. The area is composed of Presidio and Jeff Davis Counties, the former mainly Lower Sonoran in its faunal affinities, the latter principally Upper Sonoran and partly Transitional. Each county has its own mountain system; Presidio County the Chinati Mountains and Jeff Davis County the Davis Range. The Chinatis are desert mountains; the Davis are forested with oaks and pines.

To the best of the writer's knowledge, complete descriptions of the larva of this widespread species do not occur in the literature. The larva, one of the most frequently encountered grass-feeders, may be collected abundantly by sweeping lush grasslands. It is first noticed in numbers early in May. All individuals are small, having hatched from eggs laid by moths which had overwintered as pupae. By the end of May the majority have pupated, and adults appear on the wing in June. From the eggs of these developes a second generation. A third appears in August.

Two years ago, while collecting original descriptions of the geometrid moths, the author stumbled on an apparent discrepancy in Packard's original description of Chlorosea nevadaria (Proc. Bost. Soc. Nat. Hist., 16:31, 1874), and in the later description of the same species in his Monograph (p. 378, 1876).

In compiling this check list, Dixa montana Brunetti and Dixa montana Garrett were found to be homonyms. With the permission of Mr. C. B. D. Garrett, D. montana Garrett is being changed to D. garretti to comply with Article 34 of the International Code of Zoological Nomenclature.

The spruce budworm Cacoecia fumiferana Clem. is a tortricid moth which periodically appears in vast numbers in the spruce-balsam forests of Canada and the northern United States. When these outbreaks occur, the balsam fir is often killed over areas totalling thousands of square miles. Therefore, this insect has conle to be regarded as one of the most serious enemies of pulpwood forests and has attracted a good deal of attention from forest entomologists.

I attempted in 1939 to gather data on the life history of this cockroach. I was carrying on similar work on the wood-roach, Parcoblatta pennsylvanica Deg. and the American cockroach, Periplaneta americana L. However, B. germanica were so quick in their movements and escaped so easily, that I found it necessary, since my laboratory is in my home, to abandon the project. Some data were gathered, however, before the project was abandoned, on the period of incubation and the length of life of the immature roaches.