478 Materials for a Monograph 



which is itself much longer than the body ; T. polymor- 

 pha is the more abundant species. 



Mass., (H. Coll., Sanborn.) Maine, (H. Coll., Packard.) 

 N. Hampshire, (H. Coll.) Conn., (Norton.) S. Illinois, 

 (Thomas.) St. Louis, Missouri, (Sanborn.) Alabama, 

 (H. Coll.) 



BATRACHIDEA, SERVILLE. 



This genus differs from Tettix in its more solid and com- 

 pact form ; in the larger head, the more distant eyes, the 

 front less sloping ; in the smaller number of joints in the 

 antennas, which have but twelve joints, while in Tettix 

 there are thirteen or fourteen, generally the latter ; in the 

 shape of their joints, which are cylindrical instead of being 

 flattened, and more swollen than in Tettix; in the maxil- 

 lary palpi, which in Tettix has the fourth joint cylindrical, 

 very slightly largest at the apex, and the fifth cylindrical 

 and slightly swollen, while here the fourth is somewhat 

 larger at the apex than at the base, broadly but faintly 

 ridged outside, and the fifth swollen considerably, espe- 

 cially on anterior border, with a broad faint ridge outside ; 

 in the more swollen and crested summit of the head ; in 

 having the lower posterior lobes of sides of pronotum thrust 

 downwards and outwards and but slightly backwards, and 

 the lower anterior angle rounded ; in having a very high 

 arched median carina on pronotum, and the lateral carinse 

 only indicated in front ; in having the front border of pro- 

 notum thrust forward over the head a little ; in having on 

 prosternum only a broad shallow rounded transverse hol- 

 lowing ; in having the notches on the under side of the first 

 joint of posterior tarsi only very slight, instead of being 

 prominent as in Tettix and in Tettigidea ; in the shorter 

 valves of the ovipositor ; and in having stouter legs than 

 in the two genera just mentioned. See also Tettigidea. 



* 1. B. CRISTATA. 



Tetrix cristata^ Harris Mss. 



