Ca) 
EXTRACT FROM THE PROCEEDINGS 
ENTOMOLOGICAL SOCIETY OF LONDON 
(APRIL 29, 1903.) 
Dr. Freperick A. Dixy, M.A., M.D., read a paper, illus- 
trated by lantern slides, “On Lepidoptera from the White 
Nile, collected by Mr. W. L. 8. Loat, F.Z.S. ; with further 
Notes on Seasonal Dimorphism in Butterflies.” He said that 
the collection of butterflies which had been made at intervals 
by Mr. Loat during his tenure of office under the Egyptian 
Government was of special interest on account of the accurate 
data which accompanied the specimens. Mr. Loat’s collecting 
grounds were in the neighbourhood of Kaka, about 11° N. lat, ; 
and of Gondokoro, about 6° further south. The meteorologi- 
cal conditions at the time of collecting were generally those of 
the dry season, though at Kaka the rains were just beginning. 
Most of the examples of seasonally dimorphic species belonged 
to the “dry-season” phase ; but there were some curious ex- 
ceptions. Perhaps the most remarkable of these was 7eracolus 
daira, Klug, specimens of which caught in January, during the 
height of the dry season, were of the full “ wet-season ” colour- 
ing ; while some of those taken at the beginning of the rains 
were much “drier.” The large proportion of Pierinx to the 
whole number of captures was noticeable, as also was the 
general likeness of the whole assemblage to the butterfly fauna 
of Aden; the different forms of LZ. chrysippus, for example, 
were found by Mr. Loat all flying together at the same spot, 
just as is thé case at Aden. The collection brought to light 
no new species ; it contained, however, a single example of 
the male of Pinacopteryx venatus, Butl., of which only two 
