264 ENTOMOLOGICAL SOCIETY 
of Australia, correct, in considering the L. monophlcebi distinct 
from L. icerya, as species go. 
Prof. Riley also presented a communication on Dipterous larvae 
inhabiting man. After a general statement of the subject he re- 
ferred more particularly to two unpublished cases of the occurrence 
of Eristalis larvae in the human rectum, and as having been 
passed living therefrom. One of the most explicit and trustworthy 
accounts is that of Dr. J. W. Compton, of Evansville,' Ind., of a 
case of larvag which were sent to the late Prof. Baird, and which 
were determined as those of Eristalis dimidiatus. The other 
case is one recently communicated by Dr. Lintner. The larva? 
proved to be those of Eristalis tenax. 
In connection with the " bullae " on the wings, mentioned by 
Prof. Riley, Mr. Ashmead said that Walsh had called attention 
thereto in the Hymenoptera and had considered them of impor- 
tance, but that more recent writers had not followed him in this 
view. 
On the subject of Eristalis and other larvse in man there was 
much discussion. The opinion prevailed that these larvas could 
live for some time in the stomach, that they were probably taken in 
with food, or that the larvae came from eggs deposited on the anus 
and had then entered the rectum. 
Mr. Howard read a paper on the "European parasites of Ocneria 
dispar" of which he enumerated twenty-four species (among them 
one also known to inhabit North America) belonging to ten dif- 
ferent genera. Of these he considers two to be probably hyper- 
parasites. Fernald's statement that there were eleven European 
parasites known is evidently taken from Ratzeburg. 
In the discussion it was mentioned that O. dispar was acci- 
dentally introduced by Mr. Trouvelot, of Medford, Mass., about 
twenty years ago, but that it had not been noticed in numbers 
until this year. 
Mr. Ashmead exhibited a North American specimen of Hali- 
dea, and offered the following remarks : 
REMARKS ON THE CHALCID GENUS HALIDEA. 
By WM. H. ASHMEAD. 
The genus Halidea, the subject of my remarks to-night, was erected by 
Dr. Arnold Forster thirty-three years ago in his well-known work, Hy- 
