British Tyroglyphidae

H. entomophagus, Berlese, however, considers H. carpio as the only species of the genus Histiogaster, and forms a new genus, Monieziella, to receive the other species. I agree with Kramer in his latest work, where he considers Berlese's genus unnecessary. In 1899 Lieferung 7 of the great German work ' Das Tierreich ' was published ; the part was devoted to the Demodicidas and Sarcoptidae. The Tyrogly- phidae are included, being treated as a sub-family of the Sarcoptidae. This portion was the work of Dr. Kramer, although the whole part bears the joint names of Professor Canestrini and Dr. Kramer. According to the scheme of ' Das Tierreich' the Tyroglyphidae of the world are dealt with, and a short description is given of every recorded species believed by the author to be a good one. It does not contain any illustrations of species. It is unnecessary to say that this is an extremely useful and valuable work, although it contains several things which I am not able to agree with, as will be seen in the course of this work, some of which possibly Dr. Kramer might have reconsidered had not the work been written so shortly before his death. It does not contain anything relative to the internal anatomy, habits, etc., the scope of the book being purely systematic. P. Troupeau, in 1878, published a paper t on the Acari found in flour, which contained an account of some new species and some observations of general interest. "Ueber Tyroglyphus carpio eineneue art der Ga...