187 



The joints of the maxillary palpi, which here have the fourth joint much 

 larger at the apex than at the base, somewhat swollen, with a sharp, medial, 

 external ridge, and the fifth much swollen, flattened, with a faint similar 

 ridge, and slightly docked at the tip ; as in Tettix and BatracJiidca, the first 

 joint is longer than broad, cylindrical, the second slightly shorter than broad, 

 cylindrical, both together equaling the third, which is of the same length as the 

 fourth or fifth, and cylindrical. The lower anterior angle of the sides of the 

 pronotum, which is angulated and bent inward in Tettix, is here rounded and 

 straighter ; the lateral carinpe are not so prominent as there, or so strongly 

 bent inward in advance of the broader portion ; the front border is thrust 

 forward at an angle partially concealing the head The prosternum is very 

 strongly folded transversely, forming a very deep, sharp, angulated groove, 

 which in Tettix is not nearly so deep, nor are its sides so nearly approxi- 

 mated. Wing-covers considerably longer and narrower than in Tettix. This 

 genus further differs from Tettix in that there is a small, circular, swollen 

 space, devoid of facets, set ofT from the upper inner border of the eye. The 

 same is true of Batrachidea, but much more indistinctly, since it cannot be 

 discovered without the aid of such a lens as will readily separate the facets 

 of the eye. 



T. laterali!«, Scud., Bost. Jour. Nat. Hist., VII, 477. 



Syn., Tetrlx lateralis, Harr., Rep. 3d ed., 187. 



polymorpha, var. A, Burm. Handb. Ent., II, 659. 

 Acrydium laterale, Say, Ent., ed. Le Conte, I, 10, PI. v. Figs. 2, 3. 



Pale brownish-testaceous, with a lateral broad fuscous line. Pronotum 

 shorter than the wings. 



Vertex with an elevated longitudinal line, commencing near the tip and 

 extending down over the front where it is canaliculate the whole length, and 

 terminates beneath the antennte. Antenna; reddish-brown, blackish at tip. 

 Pronotum flattened, with small longitudinal lines or wrinkles, and a more 

 obvious, continuous, elevated central line extending the whole length. Wings 

 brown on the anterior margin toward the tip, and extending at least the 

 twentieth of an inch beyond the pronotum. Pleura with a dilated blackish- 

 brown line or vitta, beginning at the eye and including the abdomen above 

 and each side. Legs brown, more or less annulated with pale ; venter pale- 

 yellowish or testaceous. 



Length to the tip of the wings, 0.45 inch. 



