732 



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^air 

 with 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, at 

 Korth Fork of Snake River, Idaho. 



It is very different from G. tetraonis Denny, and closely allied to G. 

 ColcMci Denny, especially in the pyriform shape of the abdomen. The 

 head in one species is rather longer and more produced in front of the 

 antennae, the prothorax is rather longer and broader, and the mesothorax 

 wider 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. 59. 



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 transverse 

 black line across hind edge of head, ending on each side in two black 

 points, 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 of 

 which are produced hook-like beyond it. Abdomen large, orbicular, but 

 little longer than broad, white. Legs white, hind tibiae dilated distally, 

 with several long spines on the inner side, one especially large ; several 

 long hairs on the outer side. The tarsal joint ends in a curved slender 

 claw as long as itself, seen with the naked eye ; head and thorax appear 

 pale testaceous ; abdomen white. 



Length, .06 inch. Seven specimens. 



From a skunk {Mephitis) collected August 13, 1872, at Fire-Hole Basin, 

 Wyoming Territory. 



It diners from any species figured by Denny in the notch in front of 



