756 FAMILY XXXVII. ELATERID/E. 



almost obsolete tit the middle. No synopsis of the 80 or more spe- 

 cies listed from the United States has been published. They l)egin 

 to reach matnrit.y in May and are most eonniion from then until 

 al)ont Anp:nst 1. when they mostly disappear. 



KEY TO INDIANA SPECIES OF LIMOMl'S. 



a. Clypeus strongly and deeply emarginate in front ; head and thorax 

 rather densely covered with golden yellow hairs. 1434. auripilis. 

 ua. Clypeus not, or broadly and shallowly, emarginate in front. 



&. Legs and antenna^ black; thorax brilliant metallic purple, very 

 sparsely pubescent. 1435. aurifer. 



hJ). Legs and antennae reddish-brown or piceons ; thorax more or less 

 densely pubescent, not metallic. 

 c. Hind angles of thorax distinctly produced and rather strongly 

 carinate. 

 d. Color dull sooty Iirown; length 9 or more mm. 



e. Front of clypeus broadly emarginate. indistinctly margined in 

 the middle. 

 f. Form slender; antennie distinctly paler than the body, the 

 third joint notably longer than the second; thorax longer 

 than broad, its hind angles straight and median impressed 

 line indistinct ; smaller, 10-14 mm. 1436. griseus. 



//. Form broader; antenme fuscous or sooty brown, the third 

 joint scarcely longer than second; thorax as broad as long, 

 hind angles slightly but evidently divergent, median im- 

 pressed line distinct ; larger, 12.5-17.5 mm. 



1437. INTERSTITIALIS. 



cc. Front of clypeus broadly rounded or truncate, not emarginate. 

 distinctly margined. 

 [1. Cl.vpeus rounded in front ; antenna^ entirely black ; thorax 

 with a median impressed line. 143S. confusus. 



<j(j. Clypeus truncate in front ; antenuiTO with basal joints red- 

 dish ; thorax without median impressed line. 



1439. PLEBEJUS. 



del. Color black; leiiglli not over 7.5 mm. 



h. Second and third joints of antenme together longer than fourth ; 

 hind angles of thorax not paler. 1440. quercinus. 



/(/;. Second and third joints of antenufe small, rounded, together 

 distinctly shorter than fourth; hind angles of thorax pale 

 reddish-yellow. 1441. basili^vris. 



cc. Hind angles of thorax short, scarcely prdduced, feebly and indis- 

 tinctly carinate. 

 /. Elytra uniform sooty brown or piceons; length 9-11 mm. 



AGONUS. 



ft. Elytra bicolored, piceons and dull reddish-brown; length 5- 

 6.5 mm. 1442. ornatipennis. 



1434 (4348). Limonius at'ripilts Say, Journ. Thil. Acad. Nat. Sci., Ill, 

 1823, 172; ibid. II, 112, 602. 

 Elongate-oblong. Piceous black ; head and thorax densely, elytra sparse- 

 ly, clothed with yellow hairs; basal joint of antenna?, legs, narrow basal 



