52 THE CANADIAN ENTOMOLOGIST. 



the first and second segments dilated, as broad as long, and 

 twice as broad as the third or fourth. Habitat. — Polaris 

 Bay Besselsii, Pack. 



1 8. Superior claw with one tooth on the inner margin 19. 



Superior claw with two teeth on the inner margin 33. 



19. Superior claw with a tooth on the outer margin 28. 



Superior claw without a tooth on the outer margin 20. 



20. Inferior claw with a tooth on the inner margin 26. 



Inferior claw without a tooth on the inner margin 21. 



21. Mucro emarginate at apex, the dorsal angle immediately dorsad of 



the ventral angle, with two teeth, the dorsal angle being the first, 

 the second of the same length, but more pointed ; furcula reach- 

 ing the ventral tube ; dentes twice the length of the manubrium; 

 superior claw with a single tooth on the inner margin and none 

 on the outer margin ; . inferior claw without teeth, dilated at 

 base, the dilation interrupted before the middle, making a right 

 angle ; antenna and body bluish-black ; legs brownish ; furcula 

 white ; antenna; one-third longer than the head. Habitat — 



Salineville, Ohio bruntiea, n. sp. 



Mucro not emarginate at apex 22. 



22. Mucro with two or three teeth 23. 



Mucro with four teeth, the first minute, a mere hook, the second and 



third of the same length, vertical, as long as the mucro is wide, 

 the fourth slightly shorter than the third and laterad of it, its 

 base in a more dorsal plane, and pointing caudad ; furcula 

 attaining the ventral tube ; dentes more than twice the length of 

 the manubrium ; superior claw with a single tooth on the inner 

 margin and none on the outer margin ; the inferior claw without 

 teeth, the inner margin slightly dilated ; body and antennae 

 mottled black ; legs and furcula white ; antennae longer than the 

 head. Habitat — Salineville, Ohio sytioiiymica^ n. sp. 



23. First tooth of mucro horizontal or subhorizontal 24. 



First tooth of mucro forming a distinct hook 25. 



24. Mucro with three teeth, the first subhorizontal, broad, the second and 



third longer than the first, of equal length, one behind the other, 

 pointing cephalad ; furcula not reaching the ventral tube ; the 

 dentes twice the length of the manubrium ; superior claw with- 

 out teeth on the outer margin and with a single tooth on the 



