THE CANADIAN ENTOMOLOGIST 121 



glad to delegate the matter to such able hands. In due course, 

 the next season, he reported finding a freshly emerged moth of 

 P. impecuniosa crawling up the stem of a Chelone plant when he 

 was examining it to find the pupa of its borer, and naturally con- 

 cluded he had found a new food plant for the Grote species. 



The following year the writer was at Montreal in mid-July, 

 and happened upon a large colony of Turtle-head borers, working, 

 as it chanced, in a damp area where Aster pimiceus was flourishing 

 plentifully. The Aster was being bored by numerous impecuniosa 

 larvae, whose identity was beyond question, and a careful compari- 

 son of them with the larvae from the Turtle-head failed to note 

 the slightest difference It was conceded Mr. Winn was doubtless 

 correct in his surmise — a mere case of substitution of food- 

 plants was occurring. Larvae were then in the fourth stage, and, 

 knowing the trouble it would be to carry them through, the Mont- 

 real colony were in no way depleted by accessions in my behalf. 



About this time the Papaipema investigations of Mr. F. E. 

 Moeser, at Buffalo, prompted a recurrence of the question, what 

 species bores Turtle-head ? And the writer replied with consider- 

 able assurance that it was without doubt impecuniosa. But when 

 later in the season Mr. Moeser went to get the pupae from the bor- 

 ings, as can be readily done with the normal workings of the 

 species in Aster, he found they had pupated elsewhere. Even 

 then we were not convinced, for it was recalled when working in 

 Helenium, impecuniosa usually forsakes its gallery to change. 

 The next year Mr. Moeser decides to settle the matter to his own 

 satisfaction, and scores the breeding of a new species. My own 

 dull eyes had by this time seen a mature larva and had awakened 

 to a relization it could not be the Grote species. 



The stations for moeseri, doubtless, long endure. Turtle- 

 head is a tenacious perennial in those wet locations that are con- 

 genial, and indications point to the well-established colonies ex- 

 isting many years at a given spot. Such a one on Staten Island, 

 N.Y., is called to our attention. Here, almost in sight of the 

 former home of the late A. R. Grote, a woodland rill meanders 

 through the undergrowth, edged with a fringe of Chelone that 

 takes root in its very bed. This station for the plant has long been 

 a botanical record for Mr. W. T. Davis, and under his guidance 



