490 PROCEEDINGS OF THE ACADEMY OF [June, 



as caudal femora, resembling those of N. palustris excepting that in 

 the present species the humeral vein is more conspicuous and the 

 tegmina are divided by this vein into less rounded dorsal (here 

 including the intermediate channel) and more nearly perpendicular 

 lateral fields. Wings absent. Ovipositor slightly more than half 

 as long as the caudal femora, feebly arcuate, distal third of same 

 heavy, lanceolate; with both dorsal and ventral margins of apex 

 armed, the former with rather widely spaced, very heavy, and some- 

 what recurved teeth, the latter with' widely spaced serrulations. 

 The limbs are somewhat more delicate than in carolinus ana, the spines 

 of the caudal femora somewhat more slender than in that species. 



Fig. .31. — Xew.obius confusus. Ovipositor of t^-pe. (Greatly magnified.) 



The allotypic male, here selected, taken at Dead Run, Virginia, 

 August 29, 1912, by Caudell and in the United States National 

 Museum, furnishes the additional data given below. 



Description of Allotype. — Smaller but very similar to female in 

 general appearance. Tegmina transparent and very delicate; of 

 same character as in carolinus but not as much wider than abdomen 

 as in that species, when in repose the lateral margins of the dorsal 

 field are more nearly straight, subparallel. Wings absent. 



Measurements {in millimeters) . 



Tippecanoe 



Lake, Ind. Dead Run, Va. 



Type Allotype Average of series. 



9 9 d' cr^d^ 9 



Length of body 7. 6.8 6.3 6.2(6.-6.6) 7.3 



Length of pronotum 1.9 1.9 1.4 1.5(1.4-1.7) 1.7 



Caudal width of prono- 

 tum 2.2 2.3 2. 1.9(1.8-2.1) 2.1 



Length of tegmina 3. 2.9 4. 4.1(3.8-4.8) 3.1 



Length of caudal femur 5.3 5 . 4 . 7 4 . 7 (4 . 6-4 . 9) 5.3 

 Greatest width of caudal 



femur 2. 1.9 1.8 1.7(1.6-1.9) 1.8 



Length of ovipo.sitor 2.9 2.9 2.6 



