THE CANADIAN ENTOMOLOGIST. 265 TACHINID.E, NEW AND OLD. W. R. THOMPSON, ITHACA, N. Y. In the following paper are included the descriptions of two new species of Tachinidai and some miscellaneous observations upon several described genera and sj^ecies. I wish to acknowledge gratefully my indebtedness to Miss A. C. Stryke, of the Department of Entomology of Cornell University, for help with the drawing of the head oi Schizotachi?ia vit'uiervis ; to Dr. A. D. MacGillivray, who suggested the method of preparing acurate figures of the wings, and very patiently went over the paper with me, offering a great many useful suggestions for its improve-ment : and to Dr. D. W, Coquillett, who helped me out at several difficult points, and offered much valuable advice and criticism. LiftJicp.mya Desv. and Bo7ineiia Desv. Bezzi and Stein, in their Katalog der Palaartischen Dipteren, have recognized the two genera, Lhmcemya and Micropalpis. They include in the genus LifmcE/nya, comta Fall., and two other species. They include in the genus Micropalpis /Ksmorr holdalls Fall., viilpltius Fall., and several other species. They apparently have overlooked the fact that Desvoidy had designated sllvestrls, a new species described by him, and now known to be the same as vulpmus Fall, as the type of Lhuicemya. They were evidently also unaware of the fact that comta had been designated by Westwood as the type of Micropalpis. In other words, they have included under the generic name Li?mcemya, the type of the genus Micro-palpis, and under Micropalpis they have included the type and species belonging to the genus Lvmcefnya. Micropalpis was described by Macquart in 1834. The genus Boiuietla^ described by Desvoidy in 1830, also has as type comta Fall., so that Micropalpis Macq. becomes, therefore, a synonym of Botmetla Desvoidy. Mr. Coquillett has pointed this out in his paper, " The Type Species of North American Genera of Diptera." As I have not had at my disposal specimens of many of the European species included in these two genera, nor even satisfactory descriptions of all of them, I cannot definitely say what characters have been used for their separation. So far as I can gather, Liniicemya includes only forms like hcemorrholdalls Fall., in which only the females possess orbital bristles, while under Botmetla are placed those species of which both sexes have orbital bristles. The North American representatives of the genera, including the new species of Llniicetnya described below, may be separated as follows : August, 1911
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