282 The American Naturalist. [Mareh, 
manner. The ear of these insects, when present, is also similar in 
structure and position to that of the crickets, being an oblong or oval 
cavity covered with a transparent or whitish membrane, and situated 
near the basal end of the front tibiz. 
“The young of the Locustide, like those of the other families of the 
order, when hatched from the egg, resemble the adult in form, but 
are wholly wingless. As they increase in size they molt or shed their 
skin five times, the wings each time becoming more apparent, until 
after the fifth molt when they appear fully developed, and the insect 
is mature or full-grown, never increasing in size thereafter. Through- 
out their entire lives they are active, greedy feeders, mostly herbivorous 
in habit; and where present in numbers, necessarily do much damage 
to vegetation.” 
Mr. Blatchley’s other paper is entitled “ The Blattide of Indiana.” 
Seven species belonging to five genera of cockroaches are catalogued. 
“From the other Orthoptera the Blattide differ widely in the manner 
of oviposition, as the eggs are not laid one at a time, but all at once in 
a peculiar capsule or egg case called an odtheca. These capsules vary 
in the different species as regards the size, shape and the number of 
eggs they contain, but they are all similar in structure. Each one is 
divided lengthwise by a membranous partition into two cells. Within 
each of these cells is a single row of cylindrical pouches, somewhat 
similar in appearance to those of a cartridge belt, and within each 
2 
d 
Fic. 4.—Croton Bug : a, first stage ; 4, second stage; c, third stage; 
d, fourth stage; e, adult; f, adult female with egg-case; g, egg-case 
—enlarged ; 4, adult with wings spread—all natural size except g- 
pouch is an egg. The female cockroach often runs about for several 
days with an odtheca protruding from the abdomen, but finally drops 
it in a suitable place, and from it the young in time emerge.” An 
introduced tropical species, Panchlora viridis, is viviparous. 
