56 STUDIES IN NORTH AMERICAN MEMBRACID/E 



-. Dorsal contour strongly sinuated posteriorly where a trans- 

 verse angular band crosses the pronotum; lateral com- 

 pression distinct, 2. 



2. Front of pronotum with a triangular group of pale points 

 and a similar group is on either side behind the humeral 

 angle ; pronotum shorter and more convex, 



4, porphyrea Fairm 



Front of pronotum with an irregular group of pale points; 

 this is extended along the dorsum and is connected with 

 a transverse band of similar points which crosses the 

 back before the middle, 3, marmorata Say. 



1. Carynota mera Say. 



The type of the genus. This common and widely di- 

 tributed species cannot be confounded with any other known to 

 me. The male has been redescribed by Dr. Goding as Cary- 

 nota Strombergi. It is much smaller than the female and wants 

 the dorsal sinuation before the apex. Emmons figures the 

 female as Gar gar a majus. 



2. Carynota muskokensis Goding. PI. 2, fig. 26. 



This species I have seen only from Canada and northern 

 New England. It is a regularly oval species of a bright chest- 

 nut brown color on which the pale markings are inconspicuous. 

 Provancher has described it as Ophiderma marmorata. Prof. 

 Barlow has taken at Waltham, Mass., what may be a small 

 and immature male of this species but more material is needed 

 before it can be placed with certainty. 



3. Carynota marmorata Say. 



In the material I have seen under this name there appears 

 to be two fairly distinct species. The form that I determine as 

 marmorata is longer and more slender with the apical sinuation 

 less pronounced. The color is a lighter or rufous brown with 

 the pale markings forming an angulated transverse band cros- 

 sing the highest point of the dorsum where it connects with the 

 irregular area of pale irrorations of the metopidium. Here 

 the male plates form a broad almost equilateral triangle with 

 its apex moderately produced and armed with the usual bristles. 

 This form agrees most closely with Say's description of his 

 marmorata and I consider it the typical form of the species, 



