THE CANADIAN ENTOMOLOGIST. 223 



341. Himellawfidelis, Dyar? (Can. Ent., XXXVI, p 12, Feb., 1904). 

 — A i, taken by Mr. T. N. Willing at Lethbridge, Alta., on July nth, 

 1904, in perfect condition, Prof. Smith tells nie is probably this specicF. 

 Infidelis was described from Kaslo, B. C, and from Turtle Mts., North 

 Dakota, and stated to be "between contrahens, Walk., and coiia7-, Streck., 

 with the discal spots of the former, and the diversified ground colour of 

 the latter." I have the same species from Regina, Assa. 



342. TiEfiiocampa subtenninata, Smith. — Common. End April and 

 early May. At sallows. The usual colour here is a slightly reddish ashen- 

 gray,»and though the species varies to a deep brown-red, the ashen-gray 

 ground is seldom entirely obliterated. It was a surprise to me to find 

 recently that this species had formerly been confused with alia. The two 

 are, with rare exceptions, so unlike, that comparison ?eems almost superflu- 

 ous, but one of the chief differences by which they seem to be generally 

 known is not quite constant. Under the description its author states that 

 whilst in alia the s. t. line xs preceded, in subterminata it is followed by a 

 darker shade. This is quite correct in the main, but the darker shade, 

 which is a mere bordering to the s. t. line, is occasionally absent in both 

 species, though, of the two, less frequently in alia. As a matter of fact, a 

 constant character to separate them is hard to find, though the difference 

 in appearance is obvious enough. Alia has never the even ashen-gray 

 ground so common to the present specie^;, and though a dark gray ground 

 may sometimes exist, there seems to be invariably a distinct mottling or 

 peppering throughout of red, ochreous, and brown colours, present in 

 subterminata only as a shading. Sir George Hampson has had the species 

 from me, and says that it is synonymous with revicta, Morr., though 

 the type of that si)ecies does not appear to be in the British Museum. 

 Prof. Smith had never seen revicta that he reco;^nized up to the date of 

 publication of his Catalogue. I have seen a copy of the original descrip- 

 tion of revicta, and with a long series of Calgary subtenninata before me, 

 can easily believe that a certain combination of the ordinary Variation of 

 several characters occurs, which fits it in every detail. The most 

 important character oi revicta is stated to be the black subterminal line. 

 In subterminata the dark posterior shade bordering the s. t. line is some- 

 times distinctly black (though not necessarily, as stated in the description, 

 in the darkest specimens), and in one of my examples, while the black 

 bordering is very conspicuous, the pale line itself is almost obsolete. 



