Geometridae of the Argentine JRepuhlie. 295 
doubt identified by Mr. Warren himself as rectilmeata, will 
almost certainly prove to belong to the fragilis form. On 
the other hand, a nice aberration taken by Mr. Bayne in 
Buenos Aires, April 24', 1903, seems to me undoubtedly 
referable to reetilineata —perhaps to a second brood. Mr. 
Bayne at one time thought it a good species, and pointed 
out that in that season reetilineata was observed from 
February 27 to March 13 and not subsequently, until this 
straggler appeared, in fine condition. Its antemedian line 
is curved instead of straight, the median obsolescent, 
median area a little narrowed, postmedian line slightly 
angled at R^, etc. But other specimens to a large extent 
intergrade between this and the typical forms. 
1G5. Tephrinopsis fragilis (Warren) (?). 
Tephrinopsis fragilis,W oxYQn, Nov. Zooh, xi, 562 (1904), 
Tucuman, 450 m., January 1902, in coll. L. B. Prout; 
also in coll. Bastelberger from same locality;’^ La Rioja 
(Dr. E. Giacomelli), $ and $ in coll. L, B. Prout; Tunuyan, 
IMarch 1902 (A. F. Bayne), one $ in coll. L, B. Prout; La 
Paz, Mendoza, January 1903 (W. M. Bayne), one $ in coll. 
L. B. Prout; Mendoza City (W. M. Bayne), one February 
23,1903, in coll. A. F. Bayne, and one ^ in coll. L, B. Prout; 
Villa Mercedes, April 15, 1904, one ^ in coll. A. F. Bayne. 
Warren’s Tephrinopsis fragilis was described from Pisco, 
Peru, unfortunately from poor specimens; the British 
Museum has apparently the same thing from Callao and 
from Paraguay. I repeatedly and carefully compared also 
the western Argentine forms (here enumerated) with the 
types, and noted that they belonged “ almost certainly ” to 
the same species, though somewhat larger, and apparently 
with some other very slight differences, I cannot say 
positively that the insect which I am recording as fragilis 
is not a race of reetilineata, but I have not yet seen any 
specimen which I have hesitated to refer definitely either 
to the one or the other, and I am glad to know that Mr. 
A. F. Bayne also supports me in keeping them distinct. 
The fragilis forms, though as variable as the reetilineata, 
are always more strongly dark-dusted, the lines weaker 
and somewhat less straight, the postmedian of forewing 
marked with dark vein-spots or dashes, the underside 
* And I think in coll. Dognin from Tucuman and Los Vasquez; 
see under T. reetilineata. 
