1912] Proceedings of the Washington Meeting 87 
An energetic collector with time and money at his disposal can 
" make some sort of a type out of seventy-five percent of his 
species. These various types may have some value, but they 
can not always be depended upon. A great number of colors 
used indiscriminately is very confusing, for there are equally 
important features that might be designated by color, aside 
from manufactured types. Colors could be used to advantage 
to indicate abnormalities, especially today when the experi- 
mental biologist is after data as to the number and kinds of 
abnormalities that occur in specimens in nature. Such speci- 
mens are completely overlooked unless they are marked in 
some way. Not more than two colors should be used for types, 
red, for the primary, and green, for supplementary types. 
Then another color, yellow, for instance, could be used for 
abnormalities. 
Herbert Osborn. A problem in the flight of insects. (Printed 
in this number of ANNALS.) 
E. P. Felt. The biology of Miaster and Oligarces. The 
widely distributed Master larvee reproduce by paedogenesis in 
the moist, decaying bark of various trees during fall and spring, 
midges appearing from June till August. A larval generation 
occupies 3 to 314 weeks. Oligarces is less common than Mzaster. 
Both are subject to attack by a number of natural enemies. 
Leonard Haseman. Entomological work in Missouri. Since 
the early masterly work of Dr. C. V. Riley, the entomological 
needs of Missouri have not been properly served. Every line 
of entomological work is open for study. This department is 
investigating the more urgent insect problems of Missouri, 
though it is much handicapped by lack of assistance. The 
work connected with the instruction, station, nursery inspec- 
tion, and duties of State Entomologist is more than the present 
staff can properly handle. 
W.L. W. Field. Hybrid butterflies of the Genus Basilarchia. 
Since the Boston meeting two years ago, considerable progress 
has been made in the experiments with the supposedly hybrid 
Basilarchias, B. prosperpina Edw. and B. arthechippus Scud. 
Their hybrid nature has now been proven by breeding experi- 
ments. The data obtained also support the conclusions drawn 
from earlier experiments, to the effect that in proserpina the 
dlack of astyanax is incompletely but uniformly dominant over 
the white-banded condition of arthemis. 
