290 ENTOMOLOGICAL NEWS. [July, '15 



Missouriensis has the fringes on hind wings white, whereas 

 in lucetta they are of a dirty gray. The most distinctive char- 

 acters are to be found on the lower surface of the hind wings 

 and a glance at this will suffice to show that missouriensis is 

 identical with the typical form of robinsonii. 



Exp. 72 mm. 



Four specimens of this abstract form were taken in 1913 

 two males in St. Louis County, Missouri, and one male and one 

 female in Montgomery County, Alabama. Types in collection 

 of George Hosenfeldt and E. Schwarz. 



Catocala robinsonii was described by Fro.f. Grote in 1872 and 

 it is surprising that such an extremely marked form could 

 escape the detection of the collectors for such a long period. 

 Robinsonii is one of the more common species of the genus and 

 is remarkably constant in color and markings, in fact so much 

 so that when a collector ever captures the var. curvata, he feels 

 himself specially favored. Curvata is the form with a heavy 

 basal dash and a curved shade from medium shade over reni- 

 form to beneath apex. 



There also occurs an aberration in Catocala angusi var. 

 lucetta (Plate X, Figures 3 and 4), with white fringes on hind 

 wings which could, therefore, easily be mistaken for the above. 

 The illustrations show the great similarity of the two. Here 

 again the lower side guides us in determining their specific rela- 

 tion. These two forms are the most similar in the whole genus, 

 as far as the upper surface is concerned. Two specimens were 

 taken, one male and one female at Meramec Highlands, St. 

 Louis County, Missouri. 



Angusi var. edna (Plate X, Figures 5 and 6), proves to be 

 the female form in this location. Out of 400 aiujnsi taken 

 thirty-eight were females all of the cdna type, but none of the 

 males possess the cdna markings this is the form with a heavy 

 basal dash reaching to the reniform. 



EXPLANATION OF PLATE X. 



Figs, i and 2, Catocala robinsonii n. var. missouriensis. 

 Figs. 3 and 4, Aberration of C. anynsi var. lucetta. 

 Figs. 5 and 6, C. angusi var. edna. 



