224 THOMAS SAY FOUNDATION 



more than half way across seventh tergite 



hamula 



Chitinous process about as wide as long and 



reaching across entire seventh tergite 9 



9. Chitinous process spatulate, gradually drawn to 

 a point in the middle ; titillators about as long 

 as subanal lobes ; ventral lobe wider than long ; 

 length, 8.5 mm. carolinensis 



Chitinous process more or less trilobed ; titillators 

 shorter than subanal lobes ; ventral lobe about 

 as wide as long; length, 6.5 mm. triloba 



10. Eighth abdominal tergite with a single chitinous 



process 11 



Eighth abdominal tergite with two chitinous 

 processes or a single bifurcate process 12 



11. Chitinous process of eighth tergite short trun- 



cate truncata 



Chitinous process of eighth tergite rounded, and 

 hardly raised decepta 



12. Eighth abdominal tergite with two slender, 



finger-like processes, widely separate and each 



several times as long as wide sibleyi 



Eighth abdominal tergite with a raised, bifurcate, 

 chitinous process 13 



13. Chitinous process short, not reaching more than 



half way across the eighth tergite; the lobes 



broadly truncate biloba 



Chitinous process reaching to hind border of 

 eighth tergite; the lobes sharply triangular — 

 grand is 



Leuctra augusta Banks. 



(Plate 42, fig. 1.) 

 1907. Leuctra augustus Banks, Can. Ent., 39:330. 



Length to tip of wings, female, 10 mm. ; expanse, 18 

 mm. General color very dark brown or black. Head wider 

 than prothorax, black, covered with whitish pile; hind 

 ocelli about three diameters distant from eyes. Prothorax 

 much narrower than head ; as long as wide, blackish ; nar- 

 rowed behind ; angles rounded ; median longitudinal field 

 about one-fourth the width of entire pronotum ; disc of 

 pronotum very slightly rugose. Legs brown. Wings rusty ; 

 2 to 4 Cu crossveins beyond M-Cu crossveins. 



Male. Unknown. 



Female. The abdomen of the first type specimen, No. 

 11368, in the Museum of Comparative Zoology, is gone. 



