( liv ) 



figs. 4 to 6 the cutting was chiefly done by the forward 

 margin. 



The entry was usually on the upper surface of the leaf, 

 almost but not quite at the actual margin. During the short 

 time I watched them an accident happened them that I had 

 never seen occur in the sallow species, but in this case it 

 actually happened three or four times. The fly appeared to 

 believe that all was going well, and, from what I observed 

 I thought so also, until position fig. 4 was reached, when it 

 proved that the whole movement was not in the leaf, but 

 on its surface, when the fly discovered the error and desisted. 

 The leaf must have been quite glabrous and with a slightly 

 sticky, gummy surface to render this possible. 



From what Mr. Morice told us on March 1st as to the 

 differences in the saws of the two sections of the Trichiosomas 

 represented by these two species, I half expected to find some 

 difference of procedure between these two species, but it turns 

 out that they are precisely identical, except in a few quite 

 trivial details. 



I exhibit a spray of hawthorn with some of the eggs laid 

 this morning. In one instance a fly laid an egg in a leaf in 

 which it, or another, had previously oviposited, and the 

 second pocket encroached on the first. I happened to be 

 watching and expected a catastrophe, but the working of 

 the saws past the already laid egg did not seem to affect it ; 

 the two eggs, one pressing on the other, are in a leaf on the 

 exhibit. 



Later, as the eggs matured, the embryo twisted its head 

 first one way, then the other, every few seconds, as did the 

 sallow species, the brown eye-spots being seen at the^se intervals 

 suddenly moving first in one direction, then back again, with 

 rather a weird effect. 



Teratological specimen. Additional tarsal joints 

 in a Beetle.— Dr. Chapman also exhibited a teratological 

 specimen of a beetle with additional tarsal joints, and read 

 the following notes : — 



The specimen is labelled " Odoniopus cupreus ? " " Portu- 

 guese E. Africa. Mrs. Lethaby," and belongs to the Bristol 

 Museum, and I am enabled to describe it by the kindness of 



