1866] 157 
2. Ithomia Dorilla, Bates, Ent. Monthly Mag., vol. i, p. 35. 
This is a dark, strongly-marked form of I. Azara (Hew., Exot. 
Butt. Ith. f. 23). I. Azara is from the Kiver Napo ; /. Dorilla from 
the Isthmus of Panama. 
3. Synchloe Tellias, Bates, Ent. Monthly Mag., vol. i., p. 84. 
= var. of S. Lacinia, Hiibn. Zut. f. 899-900. 
Synchloe Lacinia is an extremely variable species in the number and 
form of its spots, both tawny-orange and white. 
4. Pronophila Icetijica, Bates, Ent. Monthly Mag., vol. i., p. 164. 
=P. tauropolis, Dbldy. and Hewits., Gen. Diurn. Lep. pi. 66, f. 1. 
A FEW WORDS ON THE GALL-MAKING APHIDES OF THE ELM. 
BY R. m'lACHLAN, F.L.S. 
At the meeting of the Entomological Society, held on the 5th 
November, Mr. F. Smith exhibited some large galls formed by one of 
the Aphidce, and found at Deal on the elm. On the 24th of last July, 
I observed numbers of these galls on some small elm bushes (not, I 
think, TJlmus campestris) , on the banks of the Thames near Hampton 
Court. They were either formed of modified leaf-buds, or each of a 
leaf itself, but as at that time they were fully developed it was impos- 
sible to say which. Each was either at or near the extremity of a 
twig. In size they varied from that of a walnut to that of a medium 
sized potato ; of an irregular shape, and green externally, turning to 
rosy on the side exposed to the sun. They were hollow, and each had 
a large hole on one side. Internally they were half full of liquid, which, 
as the weather had been tolerably dry, I imagined to be sap, and they 
contained also a large amount of the peculiar whitish powder, that 
always accompanies gall-making Aphidce. There were comparatively few 
Aphides present, and these of the apterous form ; but Mr. Smith, in his 
galls, found many fully developed winged individuals. 
As it seems to be uncertain if this species had been previously 
observed in Britain, a short account of it may be interesting. It first 
appears to have been noticed by Claude Joseph Geoffrey, who pub- 
lished an account of the galls in a paper that I have not seen, in the 
Memoirs of the French Academy for 1724 ; this notice also gives obser- 
vations on the viviparous reproduction of Aphides, and is quoted by 
Beaumur. The latter author, on pi. 25, (figs. 4-7) of the third volume of 
his " Memoires," (1737) gives very recognizable figures of the galls, and 
