316 THE CANADIAN ENTOMOLOGIST. 



In all the tables the venational characters take the most prominent 

 place, but many others are also employed, such as the position of the 

 ocelli, structure of the palpi and antennae, and particularly that of the 

 hypopygium of the male. There is considerable variation in the length of 

 the descriptions, some of the diagnoses of new species being only four 

 lines in length, while others occupy 20 lines or more. The descriptions 

 are supplemented by a series of tables giving the relative measurements 

 of the various joints of the legs. There is also an index to the genera and 

 a series of well executed plates, mostly in half-tone, illustrating structural 

 features, chiefly the wings and the hypopygia of the males. It is not quite 

 clear why the plates have not been numbered. 



The Canadian national collections in the Victoria Memorial Museum 

 at Ottawa should be the results of efforts to increase knowledge and the 

 exhibit should be made in a manner to diffuse knowledge. They should 

 not be collections of curios. All Canadians, especially educators, will be 

 interested to make use of the collections often, and should direct others to 

 do so as well as students. It is hoped that time may dispel rapidly the 

 idea, which unfortunately too many people have, that the place is a store- 

 house for curiosities or abnormal and monstrous things rather than that it 

 is an institution of learning. Some of the staff will always be glad to 

 meet classes or visitors and to give them such assistance as is possible. 

 Pending the completion of the lecture hall, informal talks in the laborator- 

 ies or offices may occasionally be arranged, especially if a few days' notice 

 is given. As time goes on, the institution will probably be able to loan 

 pictures, lantern slides, maps, labels, casts, and even specimens for educa- 

 cational purposes, Harlan I. Smith. 



Change of Name. — Dr. Brolemann has called my attention to the fact 

 that my genus Poabius is preoccupied by Poabius of C L. Koch. It may 

 be replaced by Pokahius. — R. V. Chamberlin. 



Corrections. — In my last paper on the genus Hydriomena (Can. 

 Ent., XLIV, Aug., 1912) the following corrections should be made: — 

 P. 225, lines 16, 17 and 19, for ^'Bockhaiism'' read ^'Borkhauseny P. 226,^ 

 line 12, for Thtnb. read Thunb. P. 229, No. 11, and p. 230, No. 11, for 

 ^'lanavahrata" read banavahraia. P. 230, line 11, for "(d) Mesial lines. 

 Sfnuity^ read "(d) Mesial space smutty^ L. W. Swett. 



Mailed October 12th, igra, 



