. 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. 32 GEOLOGICAL SURVEY OF THE TERRITORIES. is whitish, corneous on the edges. Antennse recurved, four-joiuted,basal very large, second as long as first is thick, third and fourth slender,subequal; fourth as long as second is thick. Legs stout, second i^airwith stout spines on inner side of tibise j tarsal joints very indistinct,short, with a long curved claw. Length, .10 inch. One specimen. Fro


. 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. 32 GEOLOGICAL SURVEY OF THE TERRITORIES. is whitish, corneous on the edges. Antennse recurved, four-joiuted,basal very large, second as long as first is thick, third and fourth slender,subequal; fourth as long as second is thick. Legs stout, second i^airwith stout spines on inner side of tibise j tarsal joints very indistinct,short, with a long curved claw. Length, .10 inch. One specimen. From Tetrao Eichardsoni, (jSTo. 219.) Collected August 5, 1872, atKorth Fork of Snake River, Idaho. It is very different from G. tetraonis Denny, and closely allied to Denny, especially in the pyriform shape of the abdomen. Thehead in one species is rather longer and more produced in front of theantennae, the prothorax is rather longer and broader, and the mesothoraxwider and shorter in proportion. Goniodes mepliifidis, n. sp. (Fig. 60.) Head short, about as long as broad, well rounded in front, with a nar-row curved sinus in the middle; widest behind the middle, with well-Fig. 6o. Fig. GONIODES MERRIAMANUS. GONIODES MEPHITIDIS. marked lateral projections. Two dark spots on each side of the sinus;side of head in frout of the projections lined with black. A transverseblack line across hind edge of head, ending on each side in two blackpoints, and sending obscure prolongations anteriorly. Antennse four-jointed; basal joint very large, three outer ones filiform, third consider-ably longer than second, fourth minute, short. Prothorax corneous,slightly narrower but distinct from mesothoracic segments, the sides ofwhich are produced hook-like beyond it. Abdomen large, orbicular, butlittle longer than broad, white. Legs white, hind tibiae dilated distally,with several long spines on the inner side, one especially large ; severallong hairs on the outer side. The tarsal join


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