BULLETIN 



OF THE 



BROOKLYN ENTOMOLOGICAL SOCIETY 



Vol. VIII 



June 1913 



No. 5 



Short Studies in Geometridae. No. i 



By Richard F. Pearsall, Brooklyn, N. Y. 



When entomology was young in this country it is not sur- 

 ])rising that European names were adopted for our species, when 

 of close superficial appearance. That many of them should not 

 be perpetuated I feel convinced, and in this series of papers I 

 shall expect to show where some of them are erroneous. The 

 name Petrophora incursata, Hub., appears in Dyar's List as No. 

 3449, with various synonyms applying to this European species, 

 but purports to cover also one of our forms, of which I have 

 several examples from Colorado. Placing beside these a fine 

 male of incursata, received through Mr. Prout, and therefore 

 genuine, the resemblance is easily perceived. The same soft 

 tone in coloring with its ruddy tint in the male is common to 

 both, but the cross lines seemed to vary a little and induced a 

 closer study. This revealed a structural difference in the antennae 



Antennae of 

 Petrophora incursata Hub. Petrophora salvata n. sp. 



{European, much enlarged) (^American, much enlarged) 



which I have here delineated and which makes it necessary to 

 separate our American form and give it a name. Doubtless 

 a comparison of the genitalia would also prove specific difference, 

 but I have not thought it necessary to destroy my scant materia 



