@ “xix °) 
of the hindwings were smoky black, but with the normal 
black markings easily traceable. This specimen had, how- 
ever, lost all trace of the pale ground colour and dark 
markings. 
Mr. Tutt also exhibited a series of Abravas sylvata (ulmata) 
captured during the past summer by Mr. Dutton, 25 miles from 
York. Previously the occurrence of melanic aberrations had 
been rare, but the twenty specimens exhibited were a fair sample 
of a number captured this year. The most striking were the 
blue-grey forms, in which the ground colour was entirely suf- 
fused and melanochroic. Others had the outer portions of the 
wing suffused and the base normal; others again had the 
suffusion irregular and placed asymmetrically on opposite 
wings. The tendency to form a very wide band was observ- 
able in some individuals with the ground colour normal, and 
it might be supposed that this suffusion was due to the 
spread of the grey patches on the wings which existed in 
normal specimens as lines and spots. That this was not so, 
was shown by the fact that these could be independently 
traced except in the most suffused specimens. Other examples 
were somewhat suffused with smoky-ochreous or dirty cream 
colour. These patches were particularly irregular, the 
suffusion of a single wing being common. ‘Two specimens, 
however, were regularly suffused, and, were less strongly 
marked than usual with the normal chestnut and grey 
patches. In both cases the suffusion was of the same shade as 
the main colours of the ordinary wing markings, blue-grey and 
brown, but was formed independently ana not by the spread 
of the normal spots. Mr. Dutton had stated that a large 
proportion of the aberrations were crippled, sorae having only 
two wings, and that all had the wings more or less folded and 
crumpled. He suggested that this points to mal-nutrition as 
the most probable cause. 
He also showed for Dr. Riding and Mr. Bacot bred 
specimens of both broods of Tephrosia bistortata from Clevedon, 
Somerset, and bred specimens of 7. crepuscularia and its ab. 
delamerensis from York. Reciprocal hybrids were exhibited 
between 7’, bistortata and T. crepuscularia, between the former 
and the form delamerensis ; and hybrids of the second genera- 
