152 THE CANADIAN ENTOMOLOGIST. 



to make a satisfactory separation in my series on the above characters 

 (eliminating the mere colour difference) proved abortive. 



I marked a specimen in Mr. A. F. Winn's collection at Montreal as 

 typical distans, and have two males from Mr. J. D. Evans, of Trenton, 

 Ont., which seem to fill the bill. My notes on the Washington collection 

 are : " Not one typical distans in the whole long series under this name, 

 and a ^^"ff seem undoubtedly impressa.^^ And " several under impressa 

 are typical dista?is, though others are typical hnpressa'' I am of course 

 making no claim to ability to define the limits of distans, nor always to 

 recognize it when I see it, but am merely diagnosing the typical form. 

 Granted that larval differences claimed by Dr. Dyar may signify the exist- 

 ence of two species, it has, I think, yet to be shown that they are distufis 

 and impressa. At any rate, the progeny of known females will have to be 

 carefully compared before the limits of variation in each can be learnt. In 

 Dr. Dyar's list it is signified that the larval descriptions given under the two 

 names in the Monograph were reversed. Sir George Hampson associates 

 them accordingly. 



I have at present no reason whatever for supposing that emaculata 

 male is a good species. It is more like tlie type of ijnpressa than of 

 distans, but beyond that I dare not venture at present. Mr. Heath claims 

 that he can recognize two distinct forms at Cartwright, which appear at 

 different dates, but I have not succeeded in dividing material received 

 from him supposed to contain both. During 1909 I selected from treacled 

 posts about a hundred good specimens, ranging from about June loth to 

 July 14th, but though the variation is considerable, and includes forms 

 like eastern impressa, I noted nothing in their dates, habits or appearance 

 to help me in a separation. 



I am inclined to zowi^xditx dolorosa Dyar, from Kaslo, the same species 

 as emaculata female type, and not distinct from the Kaslo female referred 

 to under that name. The form seems to me to connect female emaculata 

 with its male, and to be actually nearer the type of impressa than of 

 distans. 



141. Hadenella tonsa Grt. — In Dyar's list suhjuncta Smith is 

 referred as a synonym of minuscula Morr. Prof. Smith, in Trans. Am. 

 Ent. Soc, xxix, 194, states that it has nothing in common with minuscula, 

 but is a synonym oi tonsa Grt., and that he had studied the types of all 

 three. He so refers it in his Check List. In the Kootenai List Dr. Dyar 

 accepts this change, recording tonsa from Kaslo, and stating that the 

 specimens agree with suhjuncta type. As to the lack of close relationship 



