752 



FAMILY XXXVII. ELATERIDJE. 



sparsely and finely punctulate. Prosternal flanks sparsely and finely punc- 

 tate. Length 10-11.5 mm. 



Vermillion, Vigo, Knox and Posey counties; scarce. June 6- 

 July 24. More densely pubescent than any other member of the 

 genus taken in the State. Occurs on vegetation, especially that of 

 milkweed. 



1420 ( ). Melanotus carinus sp. now 



Elongate, rather robust. Fuscous or dark reddish-brown, sparsely pu- 

 bescent with long gray hairs ; antennas and legs paler. Clypeus feebly con- 

 cave, coarsely punctate. Third joint of antennae much narrower than and 

 one-half the length of fourth. Thorax subquadrate, scarcely narrower at 

 apex than base, sides almost straight, the punctures very coarse, rather 

 dense at sides, sparse at middle ; disk with a vague median impression on 

 basal third. Elytral striae feebly impressed, coarsely punctate; intervals 

 minutely and indistinctly punctate. Last ventral of male with coarse, 

 dense, elongate punctures. Length 12 mm. 



Lake County; rare. June 4. 



1421 (4315). Melanotus trapezoideus Lee, Trans. Amer. Phil. Soc, X, 



1853, 475. 



Elongate, slender. Dark chestnut or sooty brown, sparsely pubescent 

 with long grayish hairs ; -antennae and legs paler. Third joint of antennae 

 twice the length of second, one-third shorter than fourth. Thorax slightly 

 longer than wide, sides nearly straight, feebly rounded on apical third, disk 

 very sparsely and rather coarsely punctate; carinae of hind angles long, 

 close to the margin. Elytra subparallel to apical third, thence gradually 

 narrowed to tips ; punctures of stria? feebly impressed. Length 8-9 mm. 



Throughout the State; scarce. March 21-July 3. Probably 



hibernates. Resembles depresses, but the thorax is shorter, and in 



that species the third joint of antennae is more nearly the length of 



fourth. 



1422 ( — — ). Melanotus prasinus sp. nov. 



Elongate, slender, subcylindrical. Reddish-brown, shining, sparsely pu- 

 bescent. Clypeus subconcave, coarsely punctate. Third joint of antennae 

 twice as long as second, one-third shorter than fourth. Thorax distinctly 

 convex, slightly longer than wide, sides straight to apical third, thence 

 feebly rounded to apex, disk everywhere very finely and remotely punctate. 

 Elytra strongly tapering from base to apex ; striae rather coarsely punctate ; 

 intervals finely and sparsely punctate. Length 8.5-9 mm. 



Vermillion and Posey counties; rare. June 15-July 3. Re- 

 sembles depresses, but readily distinguished by the shorter, nearly 

 truncate clypeus, narrower and more convex thorax and shorter 

 third joint of antennas. 



1423 (4306). Melanotus macer Lee, Trans. Amer. Phil. Soc, X, 1853, 473. 

 Elongate, slender, parallel. Rather pale reddistcbrown, sparsely clothed 



with grayish hairs. Clypeus concave, coarsely and densely punctate. An- 



