THE CANADIAN ENTOMOLOGIST 269 



but those on secondaries larger and more prominent. Alar expanse — males, 

 35-37 mm., females 38-40 mm.+ 



I take great pleasure in naming this form after Mr. L. W. Swett, who 

 has done a great deal of pioneer work in this group, and to whom I owe much 

 of my prestent knowledge of the Geometridse. 



Described from five males and five females, all taken by the author at 

 \'ictoria, B. C. 



IIolotype.— &, X'ictoria, B. C, June 20th, 1914. 

 Allotype.— o , Victoria, B. C, May 22nd, 1915. 



Pamtypcs. — -4 males, Victoria, B. C, June 22nd, 1914, June 24th, 1915, 

 July Kth and 22nd, 1920; 4 females, Victoria, B.C., June 16th, 1914, June 

 24th and 26th, 1915, July 17th, 1920. 



Types and paratypes in the collection of the author. 



It is easily distinguished from midleolata on account of its larger size, its 

 ruddier appearance, and the shape of the extra-discal line on secondaries. Also 

 by the fact that normally swetti flies in June, while mulleolata makes its ap- 

 pearance in August. 



This year, being an abnormally late year, swetti did not apparently emerge 

 until the beginning of July, as the specimens that I took on the 17th and 22nd 

 of that month were a little worn and had been on the wing for at least a couple 

 of weeks. 



The list of species in this particular section of the genus Dysstroma will now 

 stand as follows: — 

 Dysstroma 



citrata Linn. 



form immanata Haw. 

 mulleolata 'Hu\st = punctum-ftotata Swett. (nee Haw.). 

 sobria Swett. 



form suhumhrata Swett. 

 form ochrofuscaria Swett. 



form sivetti Blackmore =mnlleolata Swett. (nee Hulst). 

 I do not think that mulleolata will prove to be a valid species, but will 

 eventually turn out to be a form of citrata: for the present, however, it will be 

 better to leave it as it stands until the life-histories of the various citrata forms 

 can be worked out. 



Eulype albodecorata, nov. sp. 



This new species is very closely allied to hastata L., and had perhaps better 

 be described in a comparison with that well-known species. 



Palpi, head, thorax and abdomen as in hastata. Primaries, basal area 

 black, followed by a narrow white basal line, which is gently curved from costa 

 to inner margin. Sub-basal band black and wider, similarly curved. An 

 irregular ante-median band, white, and about the same width as sub-basal. 

 The broad black median band so characteristic of typical hastata isin this species 

 broken up and considerably intermingled with white. Post-median white band 

 rather narrower than in hastata, especially costalh', with black spots on the 

 veins. The spots vary in number; in some specimens there is a spot on each 



