THE CANADIAN ENTOMOLOGIST 251 



Paratype—9 , Victoria, B. C, April 26, 1908, from Harvey 

 collection. 



All these were received through Mr. Blackmore. I am not 

 sure that the cf paratype is exactly like the others. It has a fuscous 

 tinge and more nearly approaches the 12-lineata Pack., but it is 

 best referable here, I think. Obsoleia Swett looks a trifle like small 

 Venusia cambrica Curtis, if pure white, though the antennfcTe would 

 show the difference at once. 



Diastictis andersoni, n. sp. 



Expanse 27 mm. 



Fore wings smoky gray or bluish gray, with three prominent 

 costal brown patches. The first is a basal patch, from which a 

 faint line curves outwardly to inner margin. The second line runs 

 almost straight across wing to margin; the third line is most promi- 

 nent and runs with an outward curve to about two-thirds of the 

 wing, and then runs straight to inner margin. There is a trace of 

 a fourth costal patch, and beyond the extradiscal line is a heavy 

 fuscous shade running from median vein to inner margin. Hind 

 wings are of the same colour as fore wings, and extradiscal band 

 curves outwardly across wing. No discal spots apparent in any of 

 the wings above. Fringe grayish, with a slight darkening near 

 apex of fore wings. Beneath, the fore wings are a smoky gray in 

 colour; the extradiscal line showing through; beyond which they 

 are somewhat striated. Hind wings: Discal dot large, extradiscal 

 line heavy, and all the wings somewhat striated, giving them a 

 mottled appearance. This form looks somewhat like occidiiaria 

 Pack , if smoky gray, but the extradiscal lines on both wings are 

 more curved, and it lacks any yellow shade. 



This form is possibly an aberration of some known species, 

 but I hardly think so, as it was taken by Mr. Anderson at Atlin, 

 B. C, which is pretty far north. I take pleasure in naming this 

 form after Mr. Anderson, who has proved to be an indefatigable 

 collector, and who has done much to further our knowledge of the 

 Geometrids of Northern British Columbia. 



Holotype—d', Atlin, B. C, July 13, 1914, in my collection 

 through the kindness of the collector, Mr. E. M. Anderson. 



Paratypes — from same locality and date in Provincial Museum 

 collection at Victoria, B. C, also in that of Mr. E. H. Blackmore. 



