of the North American Orthoptera. 421 



body thickly covered with punctures, most abundant and 

 largest upon the upper surface of the seventh segment, 

 where also the edges are raised ; beneath they are more 

 distant ; upon the head they are minute ; there is a faintly 

 impressed median line along the thoracic segments, except- 

 ing upon the hood-like projection of the prothorax ; the an- 

 terior half of the raised edge of the sides .of the prothorax 

 is externally indistinctly grooved ; the $ is a little more 

 arched upon the thoracic segments than the 9 . The dor- 

 sal shield of the seventh segment is slightly excavated at 

 the tip in both sexes ; and the ventral shield in the 9 is a 

 little indented upon either side of the tip. length, $ .8 

 in. ; 9 .86 in. Breadth across third abdominal segment, 

 $ .38 in. ; 9 .36 in. Breadth across mesothorax, $ .34 

 in.; 9 .30 in. Depth in middle of abdomen, J.13 in.; 

 9 .17 in. 



$ Draper's Valley, Virginia, (H. E, Scudder.) 9 N. Y., 

 (Uhler.) Penn., (H. Coll.) 3 specimens. 



PYCNOSCELUS, Nov. gen. (TTIWOS, cr/ccAo?.) 



A genus allied to the preceding, the males of which are 

 wingless. I have no specimens of the female. 



Head as in Cryptocercus^ but proportionally larger ; 

 thoracic segments, and especially prothorax, very much 

 arched, so as to form nearly a semicircle ; prothorax only 

 a little broader than long; the hind edge straight; the 

 edge of the front and sides as well as the sides of the 

 meso- and metathorax turned upwards very slightly, form- 

 ing a delicate rim ; the hind border of the meso- and meta- 

 thorax is curved backwards a little at the outer angle ; 

 wings entirely wanting ; the abdomen is very much ex- 

 panded and flattened to a thin sheet posteriorly, so as to 

 show no arching whatever ; the segments narrow very 

 rapidly towards the extremity, so that the hind curve is 

 very broad and regular ; the abdomen is half as broad 



