34 INSECUTOR INSCITI^ MENSTRUUS 



species belonging to and described in the present genus but 

 listed by Kirby in the genus Leptotettix. But this Peruvian 

 species is smaller and more slender than either of the above 

 allied forms. 



Description ( $ ).-^Head smooth, no broader than the pro- 

 notum ; eyes round and prominent ; f astigium of the vertex 

 elongate triangular, dorsally broadly sulcate, apically slightly 

 elevated and not surpassing the antennal scrobae ; there is a pair 

 of rounded tubercles at the base of this fastigium and beneath 

 the fastigium meets that of the face but projects considerably 

 beyond the point of juncture ; basal segment of the antenna 

 with a short stout apical spine on the inner dorsolateral margin ; 

 antennal scrobae well developed, continued below the eyes as a 

 transverse ridge. Thorax entirely beset with a dense mass of 

 rounded tubercles ; pronotal disk without lateral carinse, the 

 disk roundly subtruncate anteriorly and posteriorly, the an- 

 terior margin with a very broad slightly developed mesial tuber- 

 cle ; lateral lobes decidedly longer than high, the lower margins 

 straight, fore and hind margins slightly convergent, the humeral 

 sinus shallow. Legs short, the anterior femora scarcely one- 

 half longer than the pronotum ; anterior tibiae fiat and unarmed 

 above, beneath with five or six small sharp spines on each 

 margin ; middle tibiae armed beneath as in the anterior ones, 

 above flat and armed on the caudal margin on the basal half 

 with one or two small sharp depressed spines ; posterior tibiae 

 rectangular in section, armed above and beneath on both carinae 

 with a number of small spines, those of the upper side the larger, 

 and with an upper apical spine on the caudal margin only ; 

 femora with all the geniculations spined except the cephalic ones 

 of the middle legs, which are narrowly rounded ; anterior and 

 intermediate femora armed beneath with four short stout 

 spines on the cephalic margin, the opposite margin unarmed ; 

 posterior femora armed beneath with a row of eight or nine 

 stout spines on the cephalic margin only, those toward the apex 

 the larger and all apically somewhat curved backward ; all the 

 femora unarmed above. Organs of flight fully developed ; 

 wings lightly fuliginous, a little longer than broad, apically sub- 

 truncate ; tegmina about four times as long as the pronotum. 



