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 



