438 REVISION OF THE ELATERID^ 



Lake Superior, Ohio, Maine; not rare. The joints of the antennae diminish slightly in 

 length from the fourth, but the difference is not so obvious as in many of the following 

 species. The black markings of the elytra are connected by their sutural extensions; in 

 one specimen the oblique line from the humerus to the suture is wanting, although the 

 sutural portion of the spot is as large as in the other specimens. 



7. C. f urcif er, niger, cinereo-pubescens, thoraco latitudinc longiore, subtiliter punctato, lateribus 

 late rotundatis, angulis posticis subtcstaccis, elytris luteo-testaceis, macula humerali obliqua per sutu- 

 ram extonsa, alteraque lunata pone medium nigris, striis punctatis, interstitiis distincte punctatis, an- 

 tennis pedibusque piceis, illis articulo l mo testaceo. Long. '32. 



One specimen found at Eagle Harbour, Lake Superior. Marked like the preceding, but 

 in size only equal to C. propola, from which it differs by the longer thorax, and more 

 deeply striate and more distinctly punctured elytra. In form it is a little less dilated than 

 any of the preceding species. 



8. C. nubilus, crassiusculus, niger, cinereo-pubescens, thorace non transverso, lateribus rotun- 

 datis, subtilissime punctulato, angulis posticis testaceis, elytris lurido-testaceis, maculis 3 pone basin 

 (una communi) rotundatis, alteraque utrinque pone medium lunata, nigricantibus, tenuiter striatis, in- 

 terstitiis fere planis punctulatis, antennis pedibusque nigris. Long. "35. 



One specimen, collected in California by Mr. Child, and given me by Mr. Rathvon. 

 The markings are on the same plan as those of the preceding species, but they are not 

 dilated along the suture, and the anterior is broken up so as to form a rounded spot each 

 side behind the humerus, and a larger less distinct one at the suture. The finer punctua- 

 tion of the thorax, and the black feet, will enable it to be readily recognised. 



9. C. inf latus, obesus, reneo-niger, cinereo-pubescens, fronte plana convexa, thorace convexo, dense 

 subtilius punctato, subtransverso, lateribus anticc rotundatis, elytris striis punctatis, interstitiis sub- 

 convexis, confertim punctulatis, antennis piceis basi rufescentibus, pedibus runs. Long. # 33 — "45. 



Mater inflatus Say, Ann. Lye. 1, 258; Trans. Am. Phil. Soc. 6, 174; Germ. Zeitschr. 4, 74. 



Common in the Southern and Western States; rare in Pennsylvania. The interstices 

 of the elytra vary, being sometimes almost flat, and sometimes distinctly convex. This 

 species is properly attached to the first division, from the other species of which it differs 

 only by the elytra being less broadly margined; the joints of the antennae following the 

 fourth are equal; and the fourth is hardly perceptibly longer than the fifth. 



10. C. n i t i d u 1 u s , picco-ameus, tenuiter cinereo-pubescens, thorace convcxiusculo, latitudinc sub- 

 longiore, antrorsum subangustato, lateribus parura rotundatis, angulis posticis acutis productis, rufes- 

 centibus, minus dense subtiliter punctato, postice canaliculato, elytris striis impunctatis, interstitiis 

 planis disperse punctulatis, antennis piceis basi pedibusque rufis. Long. "35 — "4. 



Abundant at Lake Superior. Smaller and more slender than the next species; hardly 

 dilated on the sides: it is easily distinguished by its convex, less rounded, and less densely 

 punctured thorax. 



11. C. aratus, crassiusculus, seneo-niger, tenuiter cinereo-pubescens, thorace latitudinc sublon- 

 giorc, paulo convexo, lateribus antice rotundatis, angulis posticis acutis productis rufescentibus, pos- 

 tice profunda canaliculato, confertim, lateribus densius punctato, elytris striis tenuibus, punctatis, in- 

 terstitiis prsecipue planis, disperse punctulatis, pedibus rufis, antennis piceis. Long. -4o — "53. 



