229 



description we are inclined to agree with him; the description (Brook. 

 Bull. IV, 27) is not very clear and type locality is given as Colorado; 

 we have a note saying that the type in the Hulst Collection is labelled 

 'Washington' which on the face of it would seem to indicate a spurious 

 type; if however we take into consideration Hulst's well-known inac- 

 curacy and the fact that H. K. Morrison collected in Washington State 

 in 1880, the year previous to the description, it may very well be that 

 this specimen is a true type and correctly labelled ; it remains for 

 some-one to compare it with the original description to see if it fits 

 it accurately in which latter case we see no reason for not considering 

 it the type. For the present we shall follow Mr. Swett in applying 

 the name mulleolata to this race which apparently occurs in two gener- 

 ations as we have seen material captured in June and have in our col- 

 lection a series taken by the Rev. G. Taylor at Gabriola Is. in August, 

 a pair of which we figure (PI. XXI, Figs. 4, 5). 



The large size and ruddy claret-brown color readily distinguish 

 this race ; we have three very similar specimens from Ketchikan, 

 Alaska, taken along with numerous specimens of the form zvalkerata 

 Pears, in July; the secondaries however are very deep smoky. The 

 type of $ genitalia (PI. XXX, Fig. 1) is distinctly that of truncata 

 with possibly a very slight augmentation of the number of spines in 

 the Cornuti as compared with specimens from Europe; on the slides 

 the genitalia can at once be separated, even with the naked eye, from 

 those of citrata forms (PI. XXX, Fig. 2) which also occur in numbers 

 on Vancouver Island. 



Since writing the above notes and while our own article was in 

 press Mr. Swett's paper on the genus Dysstroma has appeared in the 

 Canadian Entomologist (1917, 49 p. 64). Recently on finding that we 

 were both working independently on the same subject we exchanged 

 views and specimens and we believe in consequence that Mr. Swett 

 has considerably modified his point of view as expressed in this paper 

 and now concedes the presence of truncata (or at least a race of the 

 same) in North America. Personally we are firmly convinced of its 

 occurrence here and, as already stated, can see no reason for not con- 

 sidering mulleolata Hist, to be a Western race of this species ; Mr. 

 Swett's statement regarding the genitalia is not at all clear or convinc- 

 ing; he mentions longer 'terminal spines' but leaves one to guess as to 

 just what he means by the term, no explanation being given as to 

 whether these 'spines' occur on the Aedoeagus, the Uncus or the 



