176 
IOWA ACADEMY OF SCIENCES. 
of a powdery white appearance. The head is large, broad and 
deep, much inflated, almost round in front; eyes dark; wing 
pads broad and short; the abdomen inclined to be carinate 
dorsally. 
They are decidedly different from the larva© of any other 
species of Tettigonia studied in the much shorter body, a fact 
which would seem to indicate separation from the normal Tetti- 
gonia forms, and which allies them to Euacanthus. 
While ordinarily considered a rather rare species this cer- 
tainly occurs during a part of the year in its particular haunts in 
great numbers — that is in the rather rank blue grass of timber 
areas. In such locations it has been estimated to occur at the 
rate of 50,000 per acre. 
DIEDROCEPHALA MOLLIPES SAY. 
Tetiigonia mollipes Say. Jour Acad. Nat. Sci , Phila., TV, p. 313, 1831. Comp, writings 
II, p. 386. Aulacizes mollipes Fitch. Homop. N, Y. State Cab., p. 56, 1851. Dieclro- 
cephala mollipes Walker. Homop. Suppl., p. 3S3, 1858. 
This species has been observed heretofore, and a record of 
two broods a year indicated. Observations this year show a 
somewhat later appearance of the spring brood, larvse occurring 
through June and first week in July, adults appearing the last 
week in June, continuing through July, and to about the 20th 
of August. The second brood of larva© appeared about the 
second week in August, running through September and matur- 
ing in October and November. First adults of second brood 
appeared about September 15th and continued through the sea- 
son. Hibernation seems to occur in all stages, considerable 
irregularity being shown, but the m.ain body being adapted to 
the hibernation of eggs. 
The ramge of food plants is large, there seeming to be little 
choice between annual or perennial grasses. It has been 
recorded from Adropogon scoparius dAid provincialise Fanicum crus- 
galli, scoparlum; Setaria viridis and glauca. Wheat, oats, barley 
(especially volunteer growth), slough grass {Spartina cynosur. 
aides) e wild rye, [Elymus canadensis). It cccurs less commonly 
on blue grass, probably in most cases only when other grasses 
are present. 
As egg deposition in autumn is almost entirely confined to 
large-stemmed grasses, the destruction of these in pastures is 
advisable. 
