FIELD BOOK OF INSECTS. 



2. Pronotum with spines on the sides 3. 



Pronotum without spines 5. 



3. The sutural angle of elytra acute or projecting as a 

 short spine; brownish, the elytra mottled with gray; 

 antennae of male sometimes four and a half times the 

 length of the body; Plate LXXXII. The variety caro- 

 linensis is paler and not much over half as long. Breeds 

 in pine Monohammus titillator. 



The sutural angle not prolonged 4. 



4. Black, distinctly bronzed, the elytra with very small 

 or no patches of white and brown pubescence; length .6 

 to i.i in. Breeds in pine Monohammus scutellatus. 



Brown; elytra sparsely mottled with small patches 

 of gray and brown pubescence; length about 1.2 in. Larvae 

 in the inner bark and sapwood of dead and dying pines, 



spruces, and balsams 



Monohammus notatus (also called confusor). 



5. Elytra rounded at the tip ; black or grayish-brown. ... 6. 

 Elytra pointed at the tip; black, densely clothed 



with uniform ash-gray pubescence; length, .3 to .5 in. 

 Breeds in walnut, mulberry, osage-orange, and hickory. 



Hetcemis cinerea. 



6. Thorax cylindrical, longer than wide; brown with 

 grayish pubescence 7- 



Prothorax slightly narrowed behind the middle, 

 nearly as wide as long ; uniform dull black ; length, .3 to .4 

 in. Breeds in hickory Dorcaschema nigrum. 



7. Pronotum transversely wrinkled, indistinctly punc- 

 tured; length, .6 to .9 in. Breeds in mulberry and 

 osage-orange Dorcaschema wildii. 



Pronotum not w r rinkled, distinctly punctured; length, 



.3 to .5 in. Breeds in mulberry and osage-orange 



Dorcaschema alternatum. 



8. Surface brownish; antennas of male not more than 

 a fourth longer than the body 9. 



Shining black, pubescence whitish; elytra coarsely 

 punctured and each with a small, black spot behind the 

 middle ; antennas of male about twice the length of the body, 



which is about .4 in. Breeds in oak and hickory 



Goes oculata. 



354 



