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NEW YORK STATE MUSEUM 



sumably retired habits enables it to escape observation to a large extent. 

 A specimen was taken at Albany June 13, and it occurs in the vicinity of 

 New York city. It has been recorded from Massachusetts, the District 

 of Columbia and southwestern Pennsylvania. It probably inhabits the 

 northeastern United States, possibly ranging north into Canada. 



Thunderbolt beetle 



Arhopalus fulminans Fabr. 



A rather slender, blackish, gray marked beetle about $4 inch long, mines as a larva 

 the inner bark and sapwood of chertnut and oak. 



This beautiful insect may be recognized by the peculiar oval, black 

 spot on the prothorax, surrounded by yellowish white pubescence, and also 

 by the much smaller, oval, more lateral spots of the same color. The 

 black antennae are nearly as long as the body and rise between the some- 

 what conspicuous, deeply emarginate, finely granulate eyes. The black 

 wing covers taper posteriorly and are irregularly marked with a whitish 

 pubescence, frequently forming a series of W-like marks, the extreme tip of 

 each wing cover bearing a rather conspicuous, oval, grayish area. This 

 species has been recorded by Dr Hopkins as infesting the sapwood of hem- 

 lock. Beetles were taken by him in West Virginia in April, May, June, 



July and August, indicating an 

 extended adult existence. Pupae 

 were met with about the middle 

 of April, and eggs in August. 



Dorcaschema nigrum Say 



A black, slender, cylindric, long- 

 horned beetle about 3/& inch long, is easily 

 reared from hickory twigs. 



This species occurs in several 



Fig. 100 Dorcaschema nigrum, enlarged (original) . ■ " . # . — . 



localities in the State, and was 

 taken at Poughkeepsie on hickory June 2, 1903. It may be easily recog- 

 nized by the long antennae, entirely black color and cylindric form, the 



