THE CANADIAN ENTOMOLOGIST 



355 



This appears to be a rare form and is much Hke mephistaria 

 Swett except for the differences noted, vi/., the wider, heavier 

 median band and different shade of colour. In this variety, as 

 well as mephistaria, the central band is solid black or reddish 

 black, and the extradiscal and intradiscal lines can barely be seen. 



Holotype.— d", Victoria, B. C , April 25, 1915, E. H. Black- 

 more, in coll. Swett. 



Allotype. — 9 , Victoria, B. C, May 2, 1915, in coll. Blackmore. 



Paratypes. — cf , Victoria, B. C, April 25, 1915, in coll. Black- 

 more; cf, Victoria, B.C., June 2, 1914, E.H. Blackmore, in coll. Swett. 



This includes all the forms of Xanthorhoe defensaria that might 

 lead to confusion and they are connected by every intergradation, 

 but I think it worth while only to describe the extreme forms, 

 where I ha\e a good series. 



Summarv of the varieties of Xanthorhoe defensaria Guen: — 



A', defensaria Gn. 



1. Var. californiata 

 Pack.? — amorata 

 Hulst. 



2. Var. conciUaria 

 Swett. 



3. Var. mephistaria 

 Swett. 



4. Var thanalaria 

 Swett. 



5. Var. giganlaria 

 Swett. 



6. Var. suppuraria 

 Swett. 



Time of appearance Med. band of fore wing. 



July 3— Aug. 31. 

 (summer form). 



Reddish chocolate ( 9 ) 

 Light brown suffused 

 with blackish (.cf j. 



July 3 — Sept. 

 (summer form). 



4. Bright reddish brown 

 (9). cf unknown 

 probably like typical 

 form. 



July 2.3— Sept. 18. 

 (summer form). 



June — -Aug. 1. 

 (summer form). 



Aug. 1 — Sept. 2.5. 

 (Chiefly Sept. — fall or 

 late summer form). 



Reddish cinereous, al 

 most blackish ( cT' 9 ) 



Solid black or reddish 

 black (cf 9). 



Very narrow, lighter 

 than typical, small sized 



(cf 9). 



April 20 — May 22. Very wide, dark reddish 



(spring form). ! brown (cf), dark red- 



Idish brown to cinereous 



(9). 



April 15— May 2. 

 (spring form). 



Very wide black or 

 reddish black ( cf 9). 



Outer border or outer 

 tliird of fore wing. 



Dark gray. 



Light gray. 



Ochre yellow, (also 

 basally). 



Light ashen gray. 



Pale ashen, almost 

 without markings, more 

 or less diaphanous. 



Dark gray. 



Pale ashen gray, some- 

 times ochreous tinge. 



These times of appearance are only approximate but give 

 the dates of my series. Whether thanataria Swett is a late summer 

 form or a third brood is a question which can only be answered 

 by breeding. 



