80 



son west of the Green Eiver Crossing, Wyoming Territory. They 

 resemble A. ochraceus Melsh, in general appearance. The head is nearly 

 as broad as the thorax and well rouuded; the eyes are about circular, 

 .11°^°^ in diameter; the mandibles are stout, about twice as long as their 

 breadth at base, tapering but slightly ; the labium is narrow. The pro- 

 tborax is about twice as broad as long, smooth, the front border slightly 

 concave above, rather strongly concave below, the sides gently and 

 regularly convex, the anterior angles rectangular, the posterior less 

 prominent, the hind border broadly convex. The prosternum and the 

 other sternal portions of the thorax seem to be delicately grauulosej the 

 middle coxre are about equidistant from the others, or perhaps slightly 

 closer to the hind pair, and the fore coxte are more closely approxi- 

 mated to each other than the others, being separated by less than their 

 own width. The scntellum is small, scarcely longer than broad. The 

 elytra are smooth, equal, tapering only near the tip, the extremity of 

 each independently and roundly pointed. 



Length, 3.2"""; breadth, 1.G5'"™ ; breadth of head, 1.05"™; of pro- 

 thorax, 1.53"™; length of same, .75'"'"; of elytra. 2.1™'"; breadth of same, 

 .9">". 



10. FhenoUa incapax. — Represented only by a single specimen and its 

 reverse from the Green Eiver shales (Richardson), showing the under 

 surface of the body, from which the appendages have been torn. It 

 closely resembles, in size, form, and the relation of the parts, P. grossa 

 (Fabr.), but differs from it in the character of the under surface of the 

 body, which, in the fossil species, is very minutely and very faintly puuc- 

 tulate, and the posterior edges of tlie segments are not raised. 



Length of fragment, 5.5''™;. of abdomen, 2.3'""; breadth of same, 3™". 



11. Chrysohoiliris Haydeni. — A single specimen, rather poorly pre- 

 served and obliquely crusbed, was obtained by tbe United States Geo- 

 logical Survey of the Territories at Castello's Ranch, South Park, Colo- 

 rado (jSTo. 1722). While it is unquestionably a Buprestid, I place this 

 species in Chrysobothris with some hesitancy. The shortness of the 

 broad-tipped elytra, the rotundity of the eyes, and the comparatively 

 slender fore femora separate it fi'om the species of that genus which I 

 have examined. The head is large, full, well rounded; the eyes moder- 

 ately large, nearly circular ; the prothorax is rather short, arched a lit- 

 tle, minutely and shallowly punctulate. The elytra reach to the base of 

 the penultimate abdominal segment, and, as exhibited on the stone, are 

 as broad at tip as at base; the apex in any case is broad, broadly 

 rounded or almost docked ; there is no appearance of punctures, although 

 there seem to be three or four faint equidistant longitudinal ridges. The 

 legs are slender and the fore femora resemble the others. 



Length of insect, 15.75""; of i)rothorax, 3.75""; of elytra, 10""; 

 width of last at tip, 2.6'"" ; length of fore femora, 3.25"" ; breadth of 

 same, .56"™ ; length of hind femora, 3.25""; breadth of same, 0.46"". 



12. Epiplianis deletus. — A single specimen was brought from Fossil 

 Canon, White River, by Professor Denton. On account of the structure 

 of the antennte and general resemblance of the insect to Epiplumis 

 cormitus Eschsch, I have placed it in the same genus; but the form of 

 the prothorax differs somewhat in the two species. The head is moder- 

 ately large, subquadrate, the antennae mouiliform, composed of twelve 

 (preserved) equal joints. The thorax is nearly quadrate with straight 

 sides, the front lateral angles rectangular, the front border straight or 

 scarcely concave, the hind border slightly angulate ; the elytra are 

 slender and taper from -the middle backward ; they are too poorly pre- 

 served to show the markings. 



