1908] KELLOGG — MALLOPHAGA OF THE WORLD H rectly idrntified by subsequent writers on Cynipidse and placed in the genus Calli-rhytis. Synergus oneratus (Harris). Cynvps oneratus Harris, Rep. Ins. Mass. Inj. Veget. 1841, p. 398; Treat. Ins. New Engl. Inj. Veget. 2nd Edit. 1852, p. 434; Treat. Ins. Inj. Veget. 3rd Edit. 1862, p. 548; ibid. New Edit. Flint, 1862, p. 548; ibid. 1863; ibid. 1880. Several galls and one adult in good state of preservation are in the collection. The gall is the product of Holcaspis globulus (Fitch) and the type of oneratus is a guest-fly of that species. THE MALLOPHAGA OF THE WORLD: SYSTEMATIC SUMMARY. BY VERNON L. KELLOGCx, STANFORD UNIVERSITY, CALIF. After many tedious hours I have made an end of compiling a catalogue, with references to original descriptions, and with host and geographic records, of the Mallophaga of the world, for }>ublication in Wytsman's Genera Insectorum. This is a highly needed work — not the list of Mallophaga, but the Genera Insectorum — and I suppose no sacrifice of time and happiness on the part of an entomolooist is to be reckoned too great, if he can help further this larger enterprise. But doino-the Mallophaga has approached, from my point of view, somewhere near the limit of this sacrifice. Twelve hundred and fifty-seven species of these little parasites of birds and mammals have been described: 52 from mammal hosts and 1205 from birds. About one fourth of these are recorded from North American hosts, and of these approxi-mately 300 species two thirds have been described as new, the other 100 being con-sidered to be identical with species originally described from European, Asiatic or African hosts. The order Mallophaga comprise twenty-seven genera, grouped into four families, constituting two sub-orders. Each sub-order includes a family found on bird hosts and one found on mammal hosts. However, a few species in the bird-infesting families are being found on mammals, especially on kangaroos and wallabies in Australia. Of course, in addition, a number of normally bird-infesting species have been found as stragglers on bird-catching mammals. The division of species among
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