The spinose ear tick, Ornithodoros megnini: Distribution 63 3. The black-legged tick, Ixodes scapularis: Distribution in the United States 78 4. The rotund tick, Ixodes Jcingi: Distribution in the United States .... 84 5. The rabbit tick, Hsemaphysails leporis-palustris: Distribution in the United States 91 (i. The brown dog tick, Rhipicephalus sanguineus: Distribution in the United States 104 7. The North American cattle tick, Margaropus annulatus: Distribution in the United States 8. The gopher-tortoise tick, Amblyomma tuberculatum: Distribution 125 9. The gopher-tortoise tick: Vesica biloba 10. The Gulf Coast tick, Amblyomma maculatum: Distribution in the United States 11. The lone star tick, Amblyomma americanum: Distribution in the United States 12. The Cayenne tick, Amblyomma cajennense: Distribution in North and Central America L53 13. The rabbit Dermacentor, Dermacentor parumapertus marginatus: Distribution L60 14. The Rocky Mountain spotted-fever tick, Dermacentor venustus: Distribution in the United States 15. The Pacific Coast tick, Dermacentor occidentalis: Distribution in the United States 16. The American dog tick, Dermacentor variabilis: Distribution in the United States 17. The tropical horse tick, Dermacentor nitens: Distribution in North America and West Indies * For the classification of the ticks the worker is referred to Mr. Banks's Revision of the Ixodoidea (1908). Descriptions of adults, aside from their size and coloration, have been omitted in the present work, as they will be found in Mr. Banks's Revision. * In determining the number of eggs deposited by a species only females that have been permitted to drop should be used.

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More interesting still was an attack made by Argentine workers upon the giant Oamponotus hm'culeanus L., subspecies pennsylvanicus De G." While watching a heavy stream of 1. htunilis workers passing up and down the bark of a large water oak tree one afternoon, three or four workers of the former species made their appearance, seeking food here and there on the same tree. Presently one of these giants crossed the line of httmilis workers and was immediately attacked. the small ants fasteni~g themselves to tibi~, tarsi and antennll~and hanging on with bulldog tenacity. With marvelous rapidity the large worker caught from one to three of her small adversaries at a time, crushed them between her jaws and threw them aside. She would reach from side to side and twist about to crush the little enemies clinging to her tarsi, but as fast as she could dispose of them others took their places. The extreme hatred which the little workers displayed towards this giant that had crossed their path was indicated by an Argentine worker which crossed the bark a couple of inches back of the herculeanus worker. Immediately the small worker changed its course and ran at full speed after the large one, catching up after traveling four or five inches, and at once attached itself to a hind tarsus. After watching this interesting battle for a considerable time the large worker was captured and placed in a cyanide bottle. There are many other points to be mentioned in connection with this introduced pest, such as its probable future distribution, its natural enemies, measures of control, and the manner in which it is likely to affect various agricultural and commercial interests, were space to permit. The problem presented by this species is a large and complicated one and much tedious work of investigation will have to be done before• the economic entomologist can claim a victory over this small but formidable foe. This paper was listened to with much interest by the members present. Mr. H. E. Weed stated that workers of this species will carry food to their nests for a distance of three quarters of a mile. He said that people who did not live in the infested district utterly failed to appreciate the havoc that these insects ,Werecausing.

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