FIELD BOOK OF INSECTS. 



3. Females with an elongated ovipositor. This, is a 

 very unsatisfactory sort of a character to have in a key, 

 but I know of no better. Acanthocinus has no erect hairs 

 in the pubescence above; the antennas are very long, with 

 at least joints 3 and 4 densely fringed beneath with short 

 hairs. A. obsoletus is dull yellowish with small blotches 

 and three undulated crossbars on elytra; length, .4 to 

 .6 in. Ceratographis (mesosternum narrow) and Graphi- 

 surus (mesosternum broad) have erect hairs. G. fasciatus 

 occurs under the bark of deciduous trees. It is grayish, 

 sprinkled with black spots and usually having two larger 

 blotches back of the middle of each elytron; .3 to .6 in. 

 long. 



Females without elongated ovipositor; except as noted, 

 usually not over .3 in. long 4. 



4. Pronotum distinctly angulate, or more frequently 

 with acute tubercles or short spines behind the middle. . . 10. 



Pronotum only feebly tuberculate or angulate at the 

 sides a little behind the middle 5. 



5. Elytra with small, tubercular elevations, each bearing 

 on its summit short, black, scale-like hairs 6. 



Elytra without such structures; .2 to .4 in. long 9. 



6. Pronotum densely punctured; elytra with densely 

 placed, coarse, deep punctures; brownish, irregularly 

 mottled with grayish pubescence; each elytron with an 

 elongate, dark spot behind the base, another (sometimes 

 becoming a bar) behind the middle, and a third near the 

 apex. Breeds in pine Leptostyhis sexguttatus. 



Pronotum not densely punctured; elytral punctures 

 not closely placed, often inconspicuous or concealed 7. 



7. Surface of pronotum not tuberculate, regularly 

 punctured 8. 



Surface of pronotum more or less tuberculate, the 

 punctures irregularly placed; blackish-brown with grayish 

 pubescence; elytra with a whitish band behind the middle, 

 this band narrowing toward the sides and edged with a 

 black line behind which the surface is smoky brown; 

 joints of basal half of antennae spotted, those of apical half 

 ringed at tips with brown. Larvae under the bark of 

 diseased or recently cut sycamore, oak, apple, and other 

 trees . Leptostylus aculiferus. 



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