. Sixth annual report of the United States geological survey of the Territories, embracing portions of Montana, Idaho, Wyoming, and Utah : being a report of progress of the explorations for the year 1872. DIPTEROUS LARVA. 740 GEOLOGICAL SURVEY OF THE TERRITORIES. ABACHNIDA. Ixodes hovis Eiley. (Packard, in First Report Peabody Academy ofScience, 1869, Fig. 66, fully gorged individual, natural size, and an-other empty, enlarged: Fig. 67, mouth-parts much enlarged.)A reddish coriaceous flattened species, with the body oblong oval, contracted just behind the middle; head short and broad, not spin
. Sixth annual report of the United States geological survey of the Territories, embracing portions of Montana, Idaho, Wyoming, and Utah : being a report of progress of the explorations for the year 1872. DIPTEROUS LARVA. 740 GEOLOGICAL SURVEY OF THE TERRITORIES. ABACHNIDA. Ixodes hovis Eiley. (Packard, in First Report Peabody Academy ofScience, 1869, Fig. 66, fully gorged individual, natural size, and an-other empty, enlarged: Fig. 67, mouth-parts much enlarged.)A reddish coriaceous flattened species, with the body oblong oval, contracted just behind the middle; head short and broad, not spined Fig. 66. Fig. IXODES BOVIS. behind, with two deep, roundpits; palpi and beak togetherunusually short; palpi longand slender; labium shortand broad, densely spinedbeneath; above, the mandi-bles are smooth, with ter-minal hooks; thoracic shielddistinct, one-third longerthan wide, smooth and pol-ished, convex, with the ly-rate mesial convexity verydistinct. The whole bodyis sparsely covered with mi-nute hairs. Legs long andslender, pale testaceous red;coxse not of body, .15 of an IXODES, MOUTH-PARTS. inch; width, .09 of an inch. This species, which occurs in great abundance at times on cattle inthe West, and Texas and Central America, was also detected by on a porcupine, {Erethizon epixcmthus,) August 10, 1872, atHenrys Lake, Idaho Territory; and on Lepus Bairdii, (No. 47,) col-lected September 15,1872, at Snake Eiver, Wyoming Territory. Argas Americana, n. sp. (Fig. 68.) Though our specimens are from Texas, (Belfrage,) yet this interesting Fig. 6S. genus, which has not been k
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