126 TETTIGID.E OF NORTH AMERICA 



VARIATIONS OF CLYPEOTETTIX SCHOCKI, BOL. 



Some specimens present a strong lobe on the inferior mar- 

 ginal carina of the anterior femora. Several examples have 

 the i^ronotum between the shoulders more tumescent than 

 usually occurs, and these appear to have the j^art of the pro- 

 notum before the shoulders, but very little constricted. With 

 this latter peculiarity is correlated retraction of the head under 

 the pronotum, the length of the head being extremely short; 

 moreover the femora are more strongly carinato-clvpeate. 

 The inferior carina- of the middle femora is scarcely the same 

 in any two specimens. Again, there is appreciable variation 

 of the posterior tarsal pulvilli. Some of the above described 

 examples are undoubtedly subspecific, and show new lines of 

 departure in the evolution of species and the future trend in 

 the specialization of parts. 



GEN. ALLOTETTIX, hanc. 



Body rugose, tuberculose; face oblique, viewed in front 

 narrow. Vertex little narrowed anteriorly, scarcel\- wider 

 than one of the eyes, or subequally wide, middle carinate, on 

 either side lightly canaliculate, occiput naked behind the eyes; 

 the front border of vertex hardly advanced so far as the eyes, 

 subtruncate, the frontal carinse elevato-rounded laterally. 

 Eyes in profile moderately elevated, subconoidal. Frontal 

 costa narrowly furcate the rami little divergent. Antenn.-e 

 in profile inserted a little below the anterior inferior border of 

 the eyes. Pronotum depressed, rather narrow, truncate 

 anteriorly, strongly prolonged posteriorly (as in Scelimena) 

 ending in a sharp attenuated apical process; median carina of 

 pronotum scarcely elevated; humeral angles strongly obtuse, 

 the superior lateral sinus of lateral lobes quite shallow, the 

 inferior sinus deepl\- incised, the posterior inferior angle 

 directed obliquely downwards and scarcely at all outwards, 

 obtuse. Elytra elongate; wings as long as the process. 

 Femora slender, margins entire, posterior tibia provided with 

 few spines (four in the outer row, more or less); the first and 

 third articles of posterior tarsi about equal in length. 



