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 After a general statement of the subject he re-ferred more particularly to two unpublished cases of the occurrence of Eristalis larvae in the human rectum, and as having been passed living therefrom.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-
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