@ svar) 
the same group, and 4 ceratinia barii, a more outlying member. 
The Hesperiid Hesperia syrichthus was the only butterfly out 
of the 323 which did not fall into one of the Ithomiine 
combinations. 
November 18th, 1903. 
Later in the discussion, replying to Mr. Morice and Dr. 
CHAPMAN, the President said that during the past summer he 
had been experimenting on the eyes of the larvee of Hnnomos 
autumnaria. In the attempt to ascertain the physiological 
significance of the eyes, some of these larvae had been blinded 
with a photographic varnish rendered opaque with lamp-black. 
It seemed impossible to imagine a more innocent material, 
and furthermore the application was but of short duration, 
for the varnish did not adhere well to the smooth chitin, 
and was soon rubbed off—probably an accidental result of 
the ordinary movements of the larve. Nevertheless, when 
the corresponding imagines emerged the speaker was intensely 
surprised to find that the majority of them were devoid of 
eyes, and that the antennze were generally rudimentary. He 
could only suppose that something in the varnish, perhaps 
the spirit, penetrated pores in the chitin and injured the 
subjacent tissues. 
The PrestDent showed an exhibit sent by Mr. A. H. Thayer, 
of Monadnock, N.H., U.S.A. The greyish silhouettes of two 
butterflies were represented in a tint nearly the same as the 
background, but sufficiently distinct to be easily recognizable. 
On one side of one silhouette a row of white spots had been 
placed in a submarginal position. It was evident that the 
adjacent border was thereby rendered far less distinct than 
that of the opposite side of the silhouette, or of both sides of 
the other silhouette. The spots in position and shape were 
approximately as in Papilio polydamas, and Mr. Thayer con- 
sidered they possessed a similar significance in this butterfly. 
The dark ground-colour of many Rhopalocerous species he 
thought represented shadow under vegetation, the white sub- 
marginal lines and dots a generalization of flowers and flower- 
masses. But these markings also had a second meaning in 
that they tended to obliterate the tell-tale margin of the wings. 
