732 



GEOLOGICAL. SURVEY OF THE TERRITORIES. 



is wliitish, corneous on the edges. Antennce recurved, four -jointed, 

 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 pair 

 with stout spines on inner side of tibite ; tarsal joints very indistinct, 

 short, with a long curved claw. 



Length, .10 inch. One specimen. 



From Tctrao Eichardsoni, (iSTo. 219.) Collected August 5,, 1872, at 

 North Fork of Snake River, Idaho. 



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

 Colchicl Denny, especially in the iiyriform 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 mepMtidis, n. sp. (Fig. GO.) 

 Head short, about as long as broad, well rounded in front, with a nar- 



row curved sinus in the middle 



Fig. 59. 



widest behind the middle, with well- 

 Fig. 6o. 



GONIODES MERKIAMANUS. 



GONIODES MEPHITIDIS. 



marked lateral projections. Two dark spots on each side of the sinus ; 

 side of head in front of the projections lined with black. A transverse 

 black line across hind edg<i of head, ending on each side in two black 

 points, and sending obscure prolongations anteriorly-. Antennae 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 tibiie ciliated 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 

 l^ale testaceous ; abdomen white. 



Length, .00 inch. Seven specimens. 



From a skunk {Mephitis) collected xiugust 13, 3872, at Fire-Hole Basin, 

 Wyoming Territory. 



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



