LORQUINIA 
69 
stick, the bats in a few minutes were sprawling here and there on the 
floor. 
After picking up some of the female bats, I was very much sur- 
prised to find, clinging to the breasts, one and sometimes two young. 
They were hairless, black in color, and their eyes had not yet opened. 
Apparently the female flew as well with her young passengers as she 
would without them. I am inclined to believe that the female carries 
the young, until they are old enough to care for themselves. I ob- 
served that while I had them in captivity, the young always stayed 
with the mother. If separated, the baby kept up a peculiar squeaky 
twitter until it found her pgain. 
I kept the bats for several weeks and tried feeding them on 
flies, hamburg steak and milk, but without success. 
LUTHER LITTLE, 
Sierra Madre, California. 
Reference: North American Fauna, No. 13. Revision of the 
North American Bats of the familv Vesnertilionidae, pp. 45, 46. 
L. L. 
LIGHT REACTIONS OF MALVA PARVIFLORA 
The common mallow, or cheeseweed, Malva parviflora L., is an 
excellent study for phototropism, or plant attraction towards sunlight. 
It had been noticed for some time that this common weed was 
strongly plagiotropic as far as its leaves were concerned. That is. the 
blades of the leaves were placed at more or less of a right angle to the 
direction of the ra3/s of sunlight. Wherever the plant was observed 
most of the leaves were inclined in the general direction of the sun. 
In early morning long before sunrise the blade of the leaves 
faced a general easterly direction. As the sun rose they faced it 
directly and followed it as it ascended toward the meridian. Through- 
out the afternoon they continued to follow it until at sunset they 
occupied a position opposite to that of early morning. Thus during 
the day the entire leaf made a turn of half a circle. 
At nine o'clock at night the leaves had reversed their direction, 
most of them now facing a direction varying from south to southeast. 
At midnight the position was practically the same as at nine o'clock. 
What was most noticeable, however, was the fact that at least seventy 
per cent of the leaves were facing the south side of an east and west 
line. Most of the remainder had a general horizontal position, the 
inclinations being slight and indefinite. There were but few north- 
erly inclinations. 
Day and night observations made during a light rain showed 
that the leaves then had little respect for direction, facing north and 
south promiscuously. 
From the above observations the following conclusions may be 
