THE POWDKlx-F'Ol^T HKKTLKS. St)l 



D. suhsiviatus Payk., pic-eoiis, length 4—1:. 5 mm., is said to occur 

 in the Northern States and Canada; T). pusiUns Fab., length 3 mm., 

 is an introduced species which lu-obably dccurs throughout the 

 United States. 



Subfamily 11. LYCTINAE. 



Elongate slender species, having the iiead prominent, scmicwhat 

 narrowed behind tlie eyes, not covered by the thorax, which is 

 trapezoidal in form and has fine side margins; antennno ll-jointed, 

 with roiaided club composed of two joints; front coxa' entirely en- 

 closed and sei)aratc(l by tlie prosternum; hind ones widely sepa- 

 rated ; first venti-al segment nnich longer than any of the others. 

 The subfamily is represented ))y but oiu^ genus, Trogoxylon Lee. 

 having been merged with Lyctus by Casey.* 



VI. Lyctus Fab. 1792. (A proper name.) 



The characters of the subfamily Lyclinw as above given apply to 

 the members of this genus. Foiu- of the nine known North Amer- 

 ican species have been taken in the State. 



KEY TO INDIANA SPECIES OF LYCTUS. 



a. Elytra with rows of large rounded, very shallow punctures; intervals 

 with a single row of punctures bearing j'ellowish hairs, which form 

 slightly raised lines ; thorax with an elongate-oval median impres- 

 sion. 1693. STRIATUS. 



aa. Elytra with smaller deeper punctures, usually arranged in more or less 

 distinct rows; thorax rarely with a median impression. 

 h. Thorax longer than wide, tlie front angles rounded. 



1694. OPACULUS. 

 hb. Thorax not longer than wide. 



c. Front angles of thorax rounded; punctures of elytra in rows; color 



piceous black. 1695. pianicollis. 



ec. Front angles of thorax not rounded ; punctures of elytra very fine 



and dense, arranged irregularly. 1696. parallelopipidus. 



1693 (5374). Lyctus striatus Melsh., Proc. Phil. Acad. Nat. Sci., II, 1844, 

 112. 

 Elongate, slender. Dull reddish-brown, sparsely clothed with yellowish 

 pubescence. Thorax nearly square, slightly narrowed behind, sides straight 

 nearly to apex; front angles rounded, hind angles distinct, surface coarsely 

 punctate, with a smoother median imi)ression. Surface of elytra as de- 

 scribed in key. Length ."'..5-5 nnu. 



Marion and Vigo counties; frequent. April 25-May 22. Bred 

 from stems of hickory. Proba])ly occurs thi-onghout the State. 



*Ann. N. Y. Acad. Sci., VI, 1891, 12. 



