Proceedings, 1914. 45 



nmiuled and less toothed than in citrata. Mr. L. B. Prout has resurrected the genus 

 niomtiuiiia, which was a syuon.vui of Ilj/tlrioiiiciia, and in it he has phued tniiiruta. 

 ( ilialu, and tlieir varieties, uialiing Iniiwata the type. Spealviug of varieties, in 

 Europe alone tniiicata has seven and citrata thirteen named varieties, which, in 

 addition to live or six varieties of the latter which occur in North America, imilvos 

 it no easy matter to separate theui. Dysstrama titruta, Linn., occurs in the eastern 

 portion of this country and does not occur in the West at all, altliough we have tour 

 of its varieties occurring on Vancouver Island — viz.. iiiinuinitlii. Haw.: siisimtalii. 

 MoscJi.: iiiiiUi'oluta. Huhst. ; and jiiiicliiiii-iiotata. Haw. 



I will now try and de.scril)e the differences between these varieties as briefly as 

 possible. ( I have with me specimens of typical insects and the varieties, and also, 

 through the kindness of Jlr. Swett. a siiecimen of the Eastern citrata and one of the 

 Euro))ean truncatu.) 



The uorniiU citrata is grey, with a solid grey central band and no re<l or brown 

 markings whatever. The variety iriiiiaiiata has the median band black instead of 

 grey, and the rest of the primaries brownish. Jiiiictiiiii-iiotata has the central 

 portion of the mesial band white, and in general appearance is very much like the 

 true triiiwata. but can always be told by the differences in the extra diskal baud 

 beneath the hind-wing. The variety siispectata has no white in the mesial band, is 

 orange-red towards the apex of the fore-wiug, and has the median band more toothed, 

 and in the upper part of the same band has a slight projection which does not occur 

 in the other varieties. The fourth and last species, miillcolatu, which Dyar lists as 

 a synonym of truncatn. is much larger than the other varieties; the hind-wings are 

 darker and the projections on the median band are more rounded. 



In summing up the above changes and additions, we will have to drop the 

 names of Mesolciicu triincata and immaiiata from our British Columbia lists and add 

 the following, which is how this species stands at present: — 

 Djisxtroinu. Linn., var. iiiiiiianata. Haw. 

 siixpectata, Jlosch. 

 iiiiilleotata, Hubst. 

 jiiiictum-notata, Haw. 

 Before leaving the genus I would like to remark that in all our local collections 

 1 have seen McsoJciua vasiliafa, Gue.. var. niitcifascia. Hubst.. is listed wrongly as 

 Mesolcuca rasiliata, Gue. The variety has a white band which is eutii-ely lacking 

 in the typical vusiliata. Of course, the true rasiliata may occur here, but all the 

 specimens I have seen so far are the variety itiiicifascia. 



Coming to our genus Hydriomena, we find another name has to be dropped from 

 our list, and that is ta'iiiuta. Now, Hydriomena taniata. Stephens, is a strictly 

 European si>ecies and does not occur in North America ; the form whicli takes its 

 place in the East is haxaliata. Walker, which Dyar lists as a synonym of laiiiata. 

 It is not a synonym, but a good species. 



We have another form here on the Pacific Coast calleil iiiiiikHs. whicli Dyar 

 erroneously placed in the genus h'licymutoge. Hub., but there is no doubt that iiraiKlis 

 is the Western form of hasaliuta, the median band being a little different in outline 

 and there are other minor differences. I have also taken a variety of praitdin both 

 in Victoria and at Duncan. V.I., which is a little different in markings, being of a 

 warm brown colour. This species is as yet undescribed. but it will probably be 

 described .some time this year. Both hasatiata. Walker, and uraiidis. Hubst., along 

 with a few others are being taken out of the genus Hydriomena and placed in 

 the old European genus TAircntia. thus reserving Hydriomena for the true IHrnis. 

 such as califiirniuia. aiitiininalix. fiircala. etc. Our species therefore will stand .-is 

 I.arentia yrandis. Hubst. 



'I'he next species on my list is Jl ydrioniiiia lalifuriiiata. Packard, which is our 

 commonest and at the same time the most variable species of this genus that occurs 

 on Vancouver Island. I have seen three and in one instance four different sjiecies 

 listed under this one name. As far as is knnwii. it only occurs on the Pacific t'oast 



