. The life history and bionomics of some North American ticks . The Spinose Ear Tick, Ornithodoros megnsni. Fig. 1.—Unengorged larva. Fig. 2.—Slightly engorged nymph, dorsal view. Fig. 3.—Slightlyengorged nymph, ventral view. Fig. 4.—Engorged nymph, dorsal view. Fig. 5.—Engorged nymph,ventral view. Fig. 6.—Engorged female, dorsal view. Fig. 7.—Male, dorsal view. Fig. 8.—Female from which all eggs have been deposited, ventral view. Fig. ..—Male, ventral view.(Original.) THE SPINOSE EAR TICK. 65 The larva (Tables XI, XII, XIII).—The seed ticks of this speciessoon succumb if exposed to moisture s
. The life history and bionomics of some North American ticks . The Spinose Ear Tick, Ornithodoros megnsni. Fig. 1.—Unengorged larva. Fig. 2.—Slightly engorged nymph, dorsal view. Fig. 3.—Slightlyengorged nymph, ventral view. Fig. 4.—Engorged nymph, dorsal view. Fig. 5.—Engorged nymph,ventral view. Fig. 6.—Engorged female, dorsal view. Fig. 7.—Male, dorsal view. Fig. 8.—Female from which all eggs have been deposited, ventral view. Fig. ..—Male, ventral view.(Original.) THE SPINOSE EAR TICK. 65 The larva (Tables XI, XII, XIII).—The seed ticks of this speciessoon succumb if exposed to moisture such as is required by the ixodidticks when kept in tubes on sand. When kept in dry pill boxes afterhatching some have died in a few days while others have lived nearlya month. On April 22, 1910, about 2,000 eggs deposited betweenApril 8 and April 22 were placed in a tube out of doors. On May 19most of the eggs had hatched. On July 27 only 5 or 6 larvae remainedalive, and the last tick died August 3. Thus it appears that a periodof 103 days
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