138 Afinals Entomological Society of America [Vol. XV, 



Russian fauna. This was followed in the same year by a resume* 

 in German with the keys translated in Latin. It appears from 

 the keys and descriptions that he has misinterpreted the char- 

 acter of the genus Orgeriiis as he describes it as wanting a cal- 

 losity behind the eye while he erects the genus NympJwrgerius 

 for species with short angular vertices and the eyes bearing 

 posterior callosities. Stal's figure of Orgeriiis shows distinct 

 callosities behind the eyes and our material also exhibits this 

 character. Unfortunately, Oshanin had no American material 

 for comparison and it is very unlikely that the genus Orgerius 

 is represented in Europe. As some of the European genera 

 appear to be closely related to our American genera we have 

 attempted to state the differences here. 



The genus Sphenocratus Horv. superficially resembles Deserta 

 but differs from the known American genera in lacking ocelli. 

 Nymphorgerius Oshanin resembles the true Orgerius but has the 

 antennae placed in a large pit with the margins elevated into a 

 carina. Unless we misinterpret this character none of the known 

 species in North America possess this peculiarity. Haumavarga 

 Oshanin differs from all known American genera of this tribe 

 in lacking a median carina on both vertex and pronotum. It 

 bears no superficial resemblance to any of our species as the 

 vertex is much broader and the angles very much rounded. 

 Repetekia Oshanin has the anterior femora and tibia flattened 

 as in Timodema Ball but has the median carina of the front 

 divided by an obtuse fracture. Timodema in addition has the 

 middle femora and tibia foliaceous. Ototettix Oshanin resembles 

 Timonidia but has a distinctly different front resembling that of 

 Ticidia Uhl. but may be separated from the latter genus by its 

 broad head which is upturned at an angle of about 45°, while 

 Ticidia and Timonidia have the head normal; also the species 

 of Ototettix are not banded as are the species of Ticidia and 

 Timodema. Tigrahaiida Oshanin resembles Acinaca in the shape 

 of the cephalic process but differs in having the oblique carina 

 running parallel to the ventral margin of the cepahlic process 

 while in Acinaca the oblique carina curves abruptly upwards 

 and ends on the dorsum. It also differs from Acinaca in having 

 the vertex furrowed and wanting a median carina. 



^ Oshanin, B. F., Rev. Rus. Ent. Vol. 13, No. 1, pp. 135-147, 1913. 



