492 NEW YORK STATE MUSEUM 



Tenebrioides corticalis Mclsli. This black, somewhat flattened beetle 

 from 14^ to .Vs inch in length, is common under the bark of elm, willow antl 

 other trees. The head and thorax are rather coarsely punctured and the 

 wing co\ers are fineh' striate with series of small distinct punctures. 



Tenebrioides castanea Melsh. This flattened, dark brown beetle occurs 

 in considerable numbers under the dead bark of beech, pine and probabl\- 

 other trees. It is about 3,^ inch long, dark brown, the head and prothorax 

 somewhat coarsely though sparsely punctured and the wing covers weakly 

 striate with rows of shallow, nearly confluent punctures. 



Nyctobates pennsylvanica DeG. This large, rather stout, jet-black 

 beetle tapers slightly anteriorly and is about 7g inch in length. It is found 

 under dead bark of various trees such as beech, hemlock and birch. The 

 head and prothorax are rather finely punctured and the wing covers are 

 ornamented with a series of minute striae composed of small distinct 

 punctures with the intermediate spaces marked i)y almost microscopic 

 punctulations. 



Iphthimus opacus Lee. This dull black, coarsely punctured beetle 

 about 34 inch long, occurs under the decaying bark of various trees. 



Tharops ruficornis Say. This insect has been taken from dead beech. 



Elater nigricollis Herbst. This species has been found under decaying 

 basswood, beech and maple bark. 



Elater humeralis Lee. This beetle may be taken in decaying beech or 

 maple stumps in March, Ajjril and May. 



Melanotus communis Gyll. This species occurs under the decaying 

 bark of various trees, being jjerhaps more nimierous under that of |)ine than 

 any other. 



Corymbites sulcicollis .Say. This species occurs imder dead birch bark 

 in March and A|)ril. 



Dorcas parallelus .Say. Larvae of this brownish beetle live in decaying 

 logs or stumps of various trees. We have taken it on elm. 



Ceruchus piceus Web. The larvae of this species have been recorded 

 from old beech stumps, decaying chestnut, willow and birch. We have 

 taken it abuntlantly in rotting black cherry. 



Horned passalus. Passalus corn ut us k'abr. Ihis very striking, 

 large mahogany brown beetle with its coarsely striate wing covers and 

 deep, broad constriction at the base of the wing covers, lives in the lar\al 

 stage in the decaying stumps of basswood, hickory and other deciduous 

 trees. 



Rough flower beetle. ()smoderma scab r a Beauv. This stout, 

 brownish, purplish black beetle about i inch long and over 'i inch in 

 breadth, with its wing covers roughened by irregular coarsely punctured 

 striae, occurs about decaying portions of various trees. Its lar\a is very 

 similar to that of the well known white grub, only larger. 



