of the North American Orthoptera. 463 



with the base and tip black, and a dusky annulation at the 

 upper limit of the spines. 



Length of body, $ 1 in., 9 1.4 in. ; of wing-cover, 9 

 1.12 in. ; breadth of wing-cover in middle, 9 .22 in. ; 

 length of hind femora, .72 in. 1 <?, 1 9. 



Mass., (Sanborn.) 



* 2. A. PLATYPTERA, nOV. Sp. 



Vertex of head much as in A. Uneata, with the apex 

 more rounded, and the edge scarcely prominent; fovcola? 

 only discernible as faint depressions, slightly longer than in 

 A. Uneata; sides of pronotum regularly but slightly diver- 

 gent; medial carina more prominent; pronotum rugose as 

 in A. Uneata ; wing-covers short and broad, costal border 

 considerably swollen near the base, internal border full. 



Dark reddish brown, marked on head and prothorax sim- 

 ilarly to A. Uneata, but with the colors much suppressed ; 

 wing-covers uniform pale brownish, transparent ; wings 

 transparent, colorless, with the nervures of the anterior 

 half black. 



Length of body, 1.2 in. ; of wing-covers, .83 in. ; breadth 

 of wing-covers in middle, .21 in. ; length of hind femora 

 .68 in. 1 9. 



New England, (Agassiz.) 



* 3. A GRACILIS, nov. sp. 



Vertex of the head as in A. Uneata, except that it is more 

 pointed, narrower, and more rounded at the tip; foveolae 

 long and narrow, triangular, rather deep ; |)ronotum as in 

 A. Uneata ; wing-covers much as in A. pUilyptera, though 

 the costal border is not swollen so much. 



Dark brown ; markings of head and thorax much as in 

 A. Uneata, though not so distinct; the band on the upper 

 border of the sides of pronotum behind the eye is narrow, 

 instead of broad ; wing-covers uniform dusky brown, ex- 

 cept the internal border which is yellowish brown ; wings 

 as in A. Uneata ; hind femora reddish, black at tip ; hind 



