9 



two first named being represented by compared specimens which are 

 also probably topotypical. 



The authors remove colora from Grotella and erect the genus 

 Grotellaforma for this species, the tibiae being unspined. Spaiildingi 

 is also removed, and a new genus, Neogrotella, erected to contain it, 

 along with two other species (new), i. e., confusa and mcdunnoughi. 

 In these the central prominence is distinctly beak-like, not hollowed- 

 out in front, as in Grotella. 



The proposed genera for the species heretofore referred to the genus 

 Grotella are : 



I. Fore and mid tibiae, at least, spined. 



A. Central prominence of front obliquely truncate, and hol- 

 lowed-out Grotella 



B. Central prominence of front not obliquely truncate and 

 hollowed-out; prominently beak-like Neogrotella 



II. Tibia unspined, fore tibiae without claws Grotellaforma 



Keys are given before the specific descriptions under each genus, 

 except Grotellaforma which contains the sole species colora, in the 

 hope that they may serve to place the majority of the specimens. The 

 occasional abherrant specimen will have to be carefully compared with 

 accurately determined material ; but the specific descriptions given here- 

 with, may prove of some assistance in this regard. Rather than quote 

 the original descriptions the authors have seen fit to redescribe the 

 species because of the availability of the types. 



Key to the Species of the Genus Grotella 



I. Primaries with the ground color white or very pale cream- 

 white, 



A. Primaries marked by small black spots or dots only, 



never more than four in the medial — s. t. regions, 



a. Primaries with the ground color satiny-chalk-white, 



a^. Fringe and terminal area (primaries) concolor- 



ously white, 



a^. With a medial line of four distinct black 



spots or dots septempunctata 



b^. The medial line with a maximum of three 

 black dots or spots, the ordinary second 

 spot outside of the cell in the t. p. line 

 area; the black spots often obsolescent, 

 a^. Secondaries with the basal area, at 

 least, not contrasting with the ground 



