1(10 THE CANADIAN KNTOMOLOtilST. 



In Transactions of ihe American Ent. Soc, XXXIV, 67-100, 1908, I 

 published in conjunction with one of my students, P. S. Dailington, a re- 

 vision of tlie Helomyzidae. The Eccoptomera americana Darl., therein 

 described is a synonym of E. simplex, described four years earlier by 

 Coquillett from Nevada, and overlooked by us. The genus Siligo, Aid., 

 in the same paper is a synonym o( Zagom'a, Coq., (Invert. Pacif., 27), and 

 belongs to the Geomyzidse, as correctly placed by Coquillett. My species 

 oregojia appears to be distinct from his flava ; my /itorea, however, is a 

 Geomyza, differing in the dark body colour and bristles, and narrower 

 cheeks. The genus Geomyza has not heretofore been reported from 

 North America, but I have three species from the California region and 

 a single specimen of a fourth species from Lawrence, Kans. Named 

 European specimens of Geomyza in Professor Melander's collection put 

 me right on this genus. My ignorance of the family Geomyzidt« was 

 responsible for my mistake ; there is really a close relation between 

 Helomyzidae and Geomyzidse, some of the latter having setules on the 

 costa. The main difference is in the auxiliary vein, distinct in Helomyzidfe, 

 not so in Geomyzid?e. I drew the wing of Si/igo from a specimen 

 mounted in balsam, wherein the pressure of the cover-glass had separated 

 the auxiliaiy and first veins to an abnormal extent. It was a consolation 

 to read since the discovery of my error that Loew once described a 

 Geomyza lurida, which on examination of the type turns out to be a Leria 

 (Czerny, Wien. Ent. Zeit., XXII, 126)! 



In Biologia Centrali-americana, Diptera, I, 342, I described a genus 

 of Dolichopodidte under the name Fhylarchus. Not having the current 

 numbers of the Zoological Record at hand, I did not know that Simon had 

 used the name for a spider in 1888. My fly of course cannot maintain her 

 ground before a spider, hence I propose the genus PROARCHUS to re- 

 place P/iylarc/iiis for the tly. 



In some notes on Scelhis {EnL News, XVIII, 135), I stated that I had 

 collected Scellus vigil o\\ trunks of trees. The statement was made from 

 memory, and I now believe that I never collected it except on walls of the 

 University buildings at l^loscovf^fiiiferus being the one that frequents pine 

 trunks in this region. Thus my observations correspond entirely with 

 Osten Sacken's. 



In Canadian Entomologist, XXXVI, 46, I undertook to determine 

 what name should be used in the place of Psilopus of authors, which has 



