342 PSYCHE. 
of the Elaphidion, until about 20 May, 
when it pupated, having eaten all but a 
few shreds of the pupa of the Elaphidion. 
The new pupa, which is represented in 
Fig. 7.—Pupa of Catogenus rufus. a, ventral view. 
6, dorsal view. 
fig. 7, was that of a coleopteron, and 
from it emerged, about 1 July, Catogenus 
rufus. 
The pupa of Elaphidion was 15.5 mm. 
long, and the pupa of Catogenus was 10 
mm. long. The pupa of the latter 
weighed about one-fifth as much as that 
of the former; therefore there must have 
been a remarkable economy in the diges- 
tive processes of the larva of Catogenus 
to enable it to utilize, in the manufacture 
of new tissues, one-fifth of the material 
which it devoured. No such power of 
economical assimilation can, of course, 
be found in the case of herbivorous lar- 
vae, nor have I been able to find any 
such case recorded for carnivorous lar- 
vae. It is surely not the case with the 
different species of larvae infesting col- 
lections, for often a single larva of 
Anthrenus will devour dried specimens 
many times as heavy as the Anthrenus 
it is to produce. 
Paris, France, 21 Dec. 1881. 
NOTE ON DEILEPHILA LINE ATA,» FABR. 
BY HENRY WEBSTER PARKER, GRINNELL, IOWA. 
Last summer (1880), Deilephila lin- 
eata, Fabr. was the most conspicuously 
common moth in the vicinity of Grin- 
nell, Iowa, especially during the month 
of August. At all hours of the day, 
one or more might be seen hovering 
over nearly every flower of the innumer- 
able weeds, mostly thistles and Helian- 
thus, by the roadsides. In places, the 
moths might be estimated by the hun- 
dreds. At Amherst, Mass. I captured 
this species, repeatedly, at twilight of 
the evening. Harris speaks of it as 
a morning sphinx. Does he mean early 
morning only? Where it is comparatively 
scarce, is it mostly crepuscular, and, 
where common, does it gain courage, 
and is it even obliged to seek its food 
at all hours of the day, the supply of 
food being small in proportion to the 
number of moths? 
—— 
os 
. 
. 
