756 FAMILY XXXVII. — ELATEElDJi;. 



almost obsolete at the middle. No synopsis of the 30 or more spe- 

 cies listed from the United States has been published. They begin 

 to reach maturity in May and are most common from then until 

 about August ] , when they mostly .disappear. 



KEY TO INDIANA SPECIES OF LIMONIUS. m. 



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

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

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



6. Legs and antennae black; thorax brilliant metallic purple, very 

 sparsely pubescent. 1435. aueifer. 



66. Legs and antennfe reddish-brown or piceous; thorax more or less 

 densely pubescent, not metallic. 

 c. Hind angles of thorax distinctly produced and rather strongly 

 carinate. 

 cl. Color dull sooty brown ; length 9 or more mm. 



e. Front of clypeus broadly emarginate, indistinctly margined in 

 the middle. 



f. Form slender ; antennaj 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. geiseus. 



ff. Form broader; antennfe fuscous or sooty brovsm, 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. 



g. Clypeus rounded in front ; antennae entirely black ; thorax 



with a median impressed line. 14;>S. confusis. 



00- Clypeus truncate in front; antemi:c with basal joints red- 

 dish ; thorax without median impressed line. 



1430. PLEBEjrS. 



(Id. Color black ; length not over 7.5 mm. 



/!.. Second and third joints of antennae together longer than fourth ; 

 hind angles of thorax not paler. 1440, Q^ERCI^'us. 



hh. Second and third joints of antennae small, rounded, together 

 distinctly shorter than fourth; hind angles of thorax pale 

 reddisli-ycllow. 3441. basillaris. 



r<: Hind angles of thorax short, scarcely produced, feebly and indis- 

 tinctly carinate. 

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



agonus. 

 n. VAyivA bicolorod, piceous and dull reddish-brown; length 5- 



^■5 ™™- 1442. orn-atipennis. 



1434 (431S). LiMONius Ai-RipiLTS Say, .Touvn. Phil. Acad. Nat. Sci.. III. 



1S2.3. 172; ibid. II, 112, (;02. 



Elongate-oblong. Picoous black ; hoad and thorax densely, elytra spar^^t- 



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



