PROCEEDINGS OF SCIENTIFIC SOCIETIES. PLS 
not an dAndrena, like those described in his paper in the last part of the 
‘ Transactions’ (“‘ Note Dipterologice,” No. 1). 
Mr. M‘Lachlan exhibited a case of a Lepidopterous larva sent by Dr. Kirk 
from Zanzibar, who had found it on a species of Mimosa. He considered 
it to be allied, probably, to Psyche and Oiketicus, and was remarkable on 
account of its form, which bore a striking resemblance to that of a flattened - 
Helix. It appeared to be constructed of a substance resembling papier 
maché, with a smooth whitish external coating. 
Mr. C. O. Waterhouse exhibited varieties of British Lepidoptera, viz., 
Chrysophanus phlwas, Polyommatus Adonis, P. Alexis and Agrotis ea- 
clamationis. 
Dr. F. Buchanan White forwarded to the Society the following account 
of a case of “ Pruritus from an Unusual Cause,” by Dr. Tilbury Fox, 
extracted from the ‘ Medical Examiner’ of 21st December, 1876 :— 
“ At the end of July, 1876, a gentleman resident in the Eastern Counties 
noticed on the eyelid of his infant a small red speck, which on examination 
with a hand-microscope proved to be a living parasite, partially imbedded 
in the skin. Several days subsequently his wife was greatly annoyed by 
pruritus, and her neck and chest were found studded here and there with 
these little red specks, which at first sight were thought to be “ petechie,” 
but turned out to be insects. They could be readily extracted with a pin. 
In the attempt to discover the source whence the parasites came, a pet pug 
dog was examined, and then collections of these parasites on the nose and 
between the eyes—where, in fact, the hair was least thick—were discovered. 
During August the little red visitors caused excessive annoyance to the 
servants and everyone in the house, defying all remedial measures, though 
some members of the household were very much less affected than others. 
Remove them as you would, the next day a fresh supply appeared, aud the 
insects were found on the arms of the infant as well as the face, on the back, 
neck and chest, and even the nipples of the adults. A favourite long-haired 
French cat was examined, because one of the family after nursing it was 
greatly annoyed, and the ears were found infested. The hair fell off, leaving 
bald patches where the parasites were congregated on the dog and the cat. 
In the middle of August the animals were shut up, isolated, and regularly 
dressed with equal parts of sulphurous acid and glycerine, and the plague 
began to diminish at once. The members of the household had tried citrine 
ointment, compound sulphur ointment, detergent solution of tar, &.; but 
still the nuisance continued in some degree, and a second cat was found 
affected. But when all the animals were shut out of the house the mischief 
did not cease. There was some doubt and difference of opinion with regard 
to the exact species of the parasite. A specimen was submitted to my friend 
Dr. Cobbold, and he pronounced it to be Zrombidium, or garden mite, 
