236 Annals Entomological Society of America [Vol. VII, 
respectively. Owing to the difficulty in getting these beetles 
to lay their full number of eggs in captivity, many of the num- 
-bers here may fall far short of what the beetles are able to do, 
and the differences between the species may have been more or 
less accidental, though C. 9-notata seemed very decidedly to be 
the most prolific. 
Considering the feeding capacity of the larvae and adults 
of these species, there seemed little difference between them. 
Aflarva of H. convergens was able to eat 100 C. negundinis in a 
single day, and the highest entire record was 576 aphids of 
different kinds. <A larva of C. 4-notata could eat 100 C. 
negundinis in a day and the highest entire record was 620 
aphids. A larva of C. monticola ate 144 to 190 A. corntfolit in 
a single day, and ‘the highest entire record was 962 aphids. 
An adult of H. conver.ens ate 120 A. setariae in a single day, 
andjone of C. 5-notata, 200 A. helianthi. 
Both in the per day, and the entire record of the larva, C. 
monticola leads, and C. 5-notata ranks second. ‘These species 
are on the whole practically alike in feeding habits and what dif- 
ferences there seem to be may be partly accidental as counts ' 
were taken on only four larvae of H. convergens, only two of 
C. 5-notata, and five of C. monticola, and only two counts of 
C. monticola exceeded the other species, the other three being 
no higher than in the others. The amount eaten per day 
varied greatly with the larvae according to the weather and the 
size of the larva, and in the adult it varied with weather and 
egg laying. 
In range of feed H. convergens, C. 5-notata, C. monticola and 
C. 9-notata seemed practically alike and seemed to comprise 
everything in the way of aphids except aphid eggs, though 
the smaller species seemed to be preferred in the breeding cage. 
Out of doors they all seemed to feed on the large species as well 
as the smaller ones. For these four species of ladybeetles the 
following plant lice were used as feed: A. cerastfoli1, A. 
gossypi1, A. oenotherae, A. carbocolor, A. taraxici, A. torticauda, 
A. oxybaphi, A. helianthi, A. setariae, A. medicaginis, A. brass- 
ice, H. arundinis, Lachnus sp., C. negundinis, C. populidola, 
C. populifolii, M. gaure, M. cynosbati, M. pist, Myzus cerasi, 
Macrosiphum ambrosie, M. rudbeckie, Prociphilus fraxinifolit, 
Phorodon humuli, S. lanigera, Melanoxantherium bicolor and 
M. smithiae. 
