38 INJURIOUS INSECTS OF 1909 AND IQIO. 
Date— Adults Young 
Ml yes oat ereae ananaealens croiehegeaaceeare Lota 4.3 les 
Uta ate Sis es cteenera a carpentoe cas in aoeestene Ato ahots 6.2 6.8 
TU PSs bose ioteke eons at rocweee 6.4 33.0 
AI /UOL Ite Pal CO) Ween eee ese ood rks avin hak Abate 2.0 18.2 
<UL OT pk LYN amine LNB 3 Seat A 2 IR en 16.2 13.4 
DUM yA Oho spice coord eee ore asboke a eee lee es WA) 
AGH hip ape reared laccies ache: cach estes tee a PED 3.0 12.5 
UU aie a OAT meee tte de ORGS OR wey, Wi AIA Be Na 13.8 19.6 
PARSE Wieder se ay cee eRe, crema Wea ak 19.2 27.7 
PASI IAs Ac eye eD ACS ie eae pey cue tars 1226 13.6 
PANTS, AAAS ee soar ams E On etal ag Pee bet a 4.4 aL 
INU Wg RAT Raat tn che Weed me Ned ILE Hs vs: 3.8 Be 
O{2) OL an GOR RA SRS elit icae GTEC octane Ene SUL 6.0 2.4 
Length of Life of the Adult. 
Experiments were made to find out how long the adults of 
FE. mali live, by taking reared specimens and keeping them on apple 
twigs in the insectary. We were unable to get any adult to live 
longer than nine days; but our results, we fear, were deceptive, as 
conditions in the experiments could not be made exactly natural, 
and it is probable that the adults of E. mali really live considerably 
longer than this in nature. Experiments along this line in 1907 
indicate that they may live for thirty days or more. 
Number of Broods. 
The first brood began emerging in the insectary about May 21st. 
They may have begun to emerge even earlier than this, in small 
numbers, out of doors, as is shown by the sweepings on alfalfa. 
The earliest individuals of this brood had become adult in consid- 
erable numbers by June 4th. The first young of the second brood, 
collected on alfalfa, was found on June 21Ist. As no sweeping 
was done on the alfalfa between the 14th and a2tst, it is quite 
possible that the first young really hatched several days before the 
21st; though it is certain that, if they did do this, it was in very 
small numbers. Nymphs of this second brood were collected on 
July 9th, and the first adults were reared from them on July 17th. 
It is almost certain that the earliest of this second brood reached 
the adult condition several days earlier than this. If we take 
June 21st (the date on which the first nymphs of this brood were 
collected on the alfalfa) as the date of earliest appearance of the 
nymphs of this brood, and add twenty-two days (the average 
number of days passed in the nymphal stages, according to the 
1907 and 1908 experiments and observations) to this date, we 
