120 



FAMILY v.— TRYXALIN^. 



the dividing soon unites with the plicate vein. The oviposi- 

 tor is nearly included. The posterior femora are more than 

 usually heavy, with the apex extending beyond the abdo- 

 men, and they are never banded. The posterior tibiae are 

 obscure or reddish, never blue, and the inner apical spur is 

 about twice as long as the one behind it. 



Eritettix tricarinatus Thos. 



This is also a very uncommon insect, but a few were 

 found with other insects in the hopper-dozers used in Otter 

 Tail county, Minn. It varies greatly in color; 

 some are almost uniform brown, with a 

 darker longitudinal stripe on each side of 

 head and pronotum, edged with a white line 

 on their outer side on the pronotum. This 

 white line seems to be found in all color-forms. 

 In many specimens the color below this line is 

 bright green, and the same color is found on 

 the anterior edges of the wings and on the 

 hind legs. Five darker spots, sometimes con- 

 fluent, are found in the middle field of the 

 wing-covers. The insect is ilhistrated in 

 Fig. 68. 

 Fig. 68.— En- Length 21.75 mm.; of tegmina, 14 mm.; of 



tettix tricarina- 

 tus. Original. postcrior femora, 12.5 mm. 



Syrbula admirabilis Uhl., which may also 

 occur in thesouthern part of the state, and has been reported 

 from Winona, has not been seen by the writer, and the oc- 

 currence at that place, though possible, is doubtful. 



GENUS Chloealtis Harris (1852). 



Vertex triangular, a little declivent, not extending in 

 front of the eyes as much as the distance between the eyes, 

 convex, more or less sulcate, with the lateral carinee little 

 elevated and the median carina slight but never entirely 



