258 fossil coleoptera 



Cerambycidae Tenebrionidae 



Scaptolenopsis wilmattae ^^^^ rmnutus 



Palaeosmodicum hamiltoni Proteleates centralis 

 Hylotrupes puncticollis Cistelidae 



Acanthoderes lengii Isomira aurora 



Chrysomelidae 



Mordellidae 

 Mordellistena scudderiana 

 Lema lesquereuxi Mordellistena nearctica 



Luperodes suhmonilis Mordellistena protogaea 



All of the figures were drawn bj^ the writer, using a camera 

 lucida. They are intended to show the outlines of the sclerites 

 as far as they can be discerned, and the courses of the principal 

 lines of sculpture. Nothmg has been restored. No attempt 

 has been made to indicate adventitious markings due to imperfec- 

 tions of the stone or to bits of adhering foreign matter. 



Lithocoryne coloradensis sp. nov. (Plate V, figs. 1, 2, 3.) 



General form elongate, similar to that of L. gravis, but differing in tho- 

 racic outline. Head large though not as wide as the prothorax, front and 

 vertex deeply and, relatively to the size of the insect, fairly coarsely punc- 

 tured, closely along the anterior, posterior, and lateral margins but more 

 sparsely at the middle. Eyes not well preserved, but what remains indi- 

 cates them to have been of moderate size. Antennae not long enough to 

 reach the prothoracic base, first joint large, about one and one half times 

 as wide as the next, second to eighth subequal, about as long as wide, ninth 

 to eleventh forming a well defined but hardly abrupt club, about twice as 

 wide as the stem. Prothorax, if complete, about one and two-thirds times 

 as broad as long, but one side is broken off. The other is nearly straight 

 behind the middle, thence gently arcuate to apex, the front angle only 

 slightly prominent, margin distinct and moderately broad. The pro- 

 thorax was, therefore, of approximately equal width from the base to the 

 middle, thence gently narrowed to apex. Punctuation less deep and more 

 sparsely placed than on the head, but of about the same size. Scutellum 

 strongly transverse. Elytra obscurely striatopunctate, the punctures 

 less pronounced than those of the thorax though of slightly larger size near 

 the base. Underside of head strongly and very closely punctate on the 

 cheeks, middle smoother. Prosternum punctured at the sides of the base, 

 fairly closely but much more finely than the head, the flanks apparently 

 only slightly wrinkled, prosternal process roughened but with no defined 

 punctures. Mesosternum strongly, almost confluently punctured in front 

 of the coxae, side pieces finely sculptured. Aletasternum weakly or finely 

 sculptured at middle, more strongly at sides. Abdominal segments partly 



