ELATERIDJv 97 



OXYUOXUS LeConte. 



A North American genus with only a couple of species. A single 

 fossil has been found in Utah. 



( >Xyc;c>NUS MORTUUS. 



< >.i-y</, nut* uiortiinx Scudd., Hull. I'. S. Geol. Geogr. Surv. Ti'iT., II, si (1S76); Tert. 

 Ins. N. A., -ilH), pi. 5, tio-s. 110, 111 (Ls'.xi). 



White River, I 'tali. 



AIKM'KTUS (aVSo^ro?) g,. n . nov. 



Head very large indeed, together with the large eyes fullv as broad as 

 the front of the pronotum, the front broad, Truncate or feebly rounded; 

 antenna' obscurely preserved, but apparently much as in Scaptolenus, but 

 with much less apical enlargement of the joints. I'rothorax strongly trans- 

 verse, nearly twice as broad as long, considerably and rapidlv tapering, the 

 front margin about three-fourths the length of the hind margin, gently and 

 uniformly emarginate; hind margin scarcely angulate, sides scarcely arcuate, 

 the outer anterior angles rectangular; both lateral and front borders equally, 

 broadly, and regularly margined, the outer posterior angles rounded and in 

 no way produced. Elytra at base of the breadth of the thorax, regularly 

 tapering by the arc-nation of the outer margin, the apex perhaps pointed. 

 Hind coxae very large, somewhat produced posteriorly next their inner side, 

 the legs large and stout and apparently flattened. Abdomen with six seg- 

 ments, the first rive of equal length and truncate, the sixth longer and conical. 



The single species referred here has a close resemblance in general 

 outline to a buprestid like Psiloptera, but the separation of the first and 

 second ventral segments shows it to be an elaterid, the transverse labrum 

 and the number of ventral segments a cebriouine. 



ADOCETTS HI'PRESTOIDES sp. nov. 

 PI. X. tig. \->. 



Surface of head more or less bluntly and rather finely rugulose. 



Thorax more heavily and more distinctly rugulose, and at the same time 



sparsely punctate, the puncta more distinct, because not confused by 



rugae, on the front margined area ; apparently also clothed with very 



MON XL 7 



