116 OETHOPTEEA. 



ee. Exceptionally stout (especially the female) ; the meso- 

 sternum fully half as broad again as the head ; tegmina 

 in female leaving the tip of the abdomen exposed, the 

 intercalary vein more or less obscure proximally and 

 only a little nearer the median than the ulnar vein; 

 transverse fascia of wings with distinct subcostal 



tgenia Agymnastes, Scudd. 



cc. Lateral canthi of the metazona typically intersected by the 

 principal sulcus, often vanishing anterior to it ; principal 

 sulcus distinctly developed on the lateral lobe. 

 d. Pronotal carina entire or intersected by but one sulcus. 



e. Pronotum with a very high foliaceous crest Tropidolophus, Thomas. 



ee. Pronotum crested or carinate, but not strongly so. 



/. Body slender, compressed ; lateral foveolse of the vertex 



trigonal, short. 



g. The whole of the apical third of the tegmina, even 



next the costal margin, membranaceous. 



h. The intercalary vein of the tegmina very distinct, 



retro-arcuate, rather remote from the median vein, 



nearly intermediate between it and the ulnar vein, 



the anterior intercalary area, therefore, rather 



broad ; wings conspicuously marked, but not 



banded Dissosteira, Scudd. 



hh. The intercalary vein of the tegmina more or less 



distinct, hardly arcuate, nearer the median than 



the ulnar vein, the anterior intercalary area, 



therefore, narrow, densely coriaceous; wings with 



a fuscous arcuate median band. 



i. Tegmina rather broad, the intercalary vein more 



or less flexuous ; pronotal crest anteriorly 



elevated, profoundly intersected, arcuate on 



the metazona as seen laterally Spharagemon, Scudd. 



it. Tegmina very narrow, the intercalary vein straight, 

 subobsolete ; pronotal crest low, straight as 

 seen laterally, not deeply intersected ....... Scirtettica, Sauss. 



ffff. The apical membranaceous portion of the tegmina 



oblique, the costal margin coriaceous. 



h. Head normal, the summit without carination, fas- 



tigium of vertex oval, rather deeply impressed, 



completely margined with elevated walls . . . Microtes, Scudd. 



hh. Head rugose, the summit carinated, the fastigium 



truncate at the apex, open, the occiput more or 



less grooved and ridged Lactista, Scudd. 



//. Body rather stout ; lateral foveolse of head lanceolate . Tomonotus, Sauss. 



