THE CANADIAN ENTOMOLOGIST. 57 



crocigrapha. 



Dear Sir.— 



On page 250 of the Can. Ext., Mr. Morrison doubts the propriety of 

 the generic reference of Perigrapha Normani Grote. I had previously 

 (Bull. B. S. N. S.) noted the different antennal structure of the American 

 species, not being acquainted autoptically with the European forms. The 

 species of Perigrapha are regarded as related to Taeniocampa by Lederer, 

 and it was natural that in describing an American species, differing by the 

 presence of a prothoracic tuft, that I should refer it to a genus differing 

 by this character from Taeniocampa, to which otherwise both were 

 related. Lederer has divided the genus Taeniocampa (which should now 

 be known, as I have shown elsewhere, as GrapJiiphora) into sections 

 already, on peculiarities of antennal structure. There can be no propriety 

 of further enlarging the genus by the admission of species with a tufted 

 thorax, so that I propose the above name for C. Normani. 



Dear Sir. — 



• 



In Mr. Morrison's letter on page 16 of this volume of the Canadian 

 Entomologist, he allows himself to call my statements with regard to 

 certain recently described species, " palpable blunders/' In the course 

 of his paper, however, the synonyms I claimed that Mr. Morrison has 

 made are admitted, with the exception of two, Hadena rasi/is and Agrotis 

 exsertistigma. With regard to the former insect, I think it much more 

 nearly resembles Hiibner's figure of grata than GrapJiiphora oviduca does 

 in habitus, size, ornamentation and color, and my blander (if I had made 

 one) can hardly be called " palpable." With reference to Agrotis 

 exsertistigma, I find that I am in error and that the species is valid. I 

 have not known until now the true exsertistigma. Mr. Morrison founded 

 this species on two specimens sent him by myself for description with 

 other material, but neither were returned me with the other specimens. 

 Having no duplicates of the material sent him, I inferred that exsertistigma 

 was based on specimens with open orbicular, which I referred to alternata^ 

 but which I now see are Californian specimens of A. cupula Grote. Mr. 

 Morrison's non-return of the specimens merely confirmed me in my own 

 wrong identification of altemata Grote, as found in California. I am 

 exceedingly sorry to find myself in double error. In the present case the 

 description of Mr. Morrison has helped to mislead me, since exsertistigma 

 has a conical abdomen and should not be compared with either altemata 



