Vol. xxiii] ENTOMOLOGICAL NEWS 3 
to the oaks the grasshoppers when pressed for food will eat 
other plants, and we observed where several had devoured 
parts of the leaves of a sumach, Rhus copallina. They did 
not seem to like wild cherry, Prunus scrotina. 
It is evident that if the seasons continue favorable, this grass- 
hopper may become a serious pest in New Jersey, as it has 
been in Missouri and Texas, according to the writings of Dr. 
Riley and Prof. Bruner. 
Thecla dumetorum and T. affinis; a Study (Lepid.). 
By J. R. Haskin, Los Angeles, Cal., and F, GRINNELL, JR., 
Pasadena, Cal. 
Although Thecla dumetorum was described in 1852 and 
affinis in 1862, very little has been written about them. Appar- 
ently no effort has been made to check the descriptions in spite 
of the fact that Western collectors have long felt that they did 
not correctly describe the common green Thecla of the Western 
States. 
It seems to have become generally understood that dume- 
torum should have a row of white spots across both wings, on 
under side, while affinis should be spotless. When, therefore, 
it is found that the majority of specimens follow neither of 
these extremes, but have a number of spots on secondaries 
only, their proper classification gives rise to the question, just 
what did Boisduval and Edwards have in mind when they 
wrote their descriptions. 
T. DUMETORUM. 
Boisduval was the first to describe our green Thecla from 
material collected by Lorquin in the early fifties. In his Lepi- 
dopteres de la Californie, 1852, p. 19, he wrote: 
“22 Thecla Dumetorum.” 
“Ce Thecla ressemble tout a fait a notre Rubi, et pourrait bien etre 
une simple variete locale de cette espece. 
“I] lui ressemble en dessus, sauf que les ailes inferieures sont moins 
denticulies, et que la palette anale est a peu pres nulle; en dessous, la 
ligne de points blancs est plus marquee, et le disque des ailes super- 
