714 FAMILY xxxvir. ELATERID/T:. 



surface covered with small oblong scale-like hairs. Five species 

 have been taken in the State, while two others perhaps occur. For 

 a table separating the North American species see : 



fl"on?.— Trans. Amer. Ent. Soc, VII, 1879, Appendix, XIV-XV. 



KEY TO INDIANA SPECIES OF ADELOCERA. 



a. Front tarsi in repose received in grooves on the under side of tlie tho- 

 rax. (Fig. 272, c.) 

 1). Tarsal grooves deep, oblique, distinctly limited, uniting behind with 

 the antennal grooves. (Fig. 272, 6 and c.) 



c. Punctures of elytra in regular rows; impression of thorax shallow. 



1347. IMPRESSICOIXIS. 



cc. I'uuetures of elytra dense, not in rows; impression of thorax dis- 

 tinct; surface of elytra irregularly spotted with brown and dull 

 yellow scales. 1348. maemorata. 



6&. Tarsal grooves feebly impressed, neither distinctly limited nor join- 

 ing the antennal grooves. 



d. Head and sides of thorax densely covered with closely appressed 



golden yellow scales. 1349. discoidea. 



dd. Head and thorax without yellow scales; elytra spotted with brown 

 and dull yellow. maculata. 



an. Tarsal grooves entirely absent. 



c. Disk of elytra convex ; thorax feebly channeled ; antennal grooves 

 long, reaching the coxaj. 1350. avita. 



ee. Disk of elytra depressed; thorax broadly channeled; antennal 

 grooves abbreviated behind. 

 /. Impression of thorax entire, extending from base to apex ; hind 

 angles divergent. 1351. obtecta. 



ff. Impression of thorax limited to basal half; hind angles not di- 

 vergent, compressed and feebly carinate ; antennae very short. 



BREVICORNIS. 



1347 (4071). Adelocera impressicollis Say, Ann. Lye. Nat. Hist., N. Y., 

 I, 1825, 260 ; ibid. I, 394 ; II, 619. 

 Elongate, slender, subdepressed. Dull reddish-brown, sparsely covered 

 with short, curved yellow hairs. Thorax oblong, disk convex, with an in- 

 distinct median sulcus and two shallow fovese each side near base, sides 

 nearly pai'allel, sinuate near hind angles, which are oblique and rather 

 short; surface densely, coai-sely and deejily punctured. Elytra with regu- 

 lar rows of coarse, close, deep punctures. Under surface punctured like 

 the thorax. Length 9-11.5 mm. 



Southern half of State, frequent ; Fulton County, scarce. April 

 12~November 10. 



3348 (4072). Adelocera marmorata Fab., Syst. Eleut., II, 1801, 227. 



Elongate, robust, rather strongly depressed. Dark reddish-brown, sub- 

 opaque; sparsely covered with dull yellow scales which, on the elytra, 

 form irregular blotches. Thorax as long as wide, disk subconvex, with a 



