THE CANADIAN ENTOMOLOGIST. 45 



thoracic spot. From these accounts it would appear that there is con 

 siderable difference between these forms, the larva and beetle of unipunc- 

 tata being light in color, while helianthi is dark. With regard to food 

 plants, so far as known helianthi is confined to sunflower (Helianthns). 

 Randall says : " Many specimens of our species occurred at Farmington, 

 near the margin of the Sandy River, on a species of Helianthtis ; a great 

 many of these plants were almost wholly deprived of leaves by their 

 ravages." 



So far as I am aware, there is no authentic record of typical unipu?ic- 

 tata having been observed feeding on Helianthus. Utiipimctata was 

 taken by Dr. Hamilton feeding on mint, Monarda fistulosa. He further 

 informs us that they " must have fed on the Monarda from choice rather 

 than necessity, because three species of Ifelia?ithus grew with it and were 

 not eaten by either larva or beetle." ,Prof Riley, American Entomologist 

 and Botanist, vol. ii., p. 4, states that he has " observed the one-dotted 

 Tortoise-beetle (Physonota unipunctata Say) feeding in the larval state 

 upon a Sow-thistle (Sonchus)." Both forms seem to be widely dis- 

 tributed ; Say records utiipunctata from Missouri ; Dr. Hamilton records 

 it from Allegheny, Pa., but states that it had no doubt been brought from 

 some more northern region during the annual spring inundation. Helianthi 

 is recorded from Rock Island, 111., by Walsh, or its var., quinqiieptinctata. 

 Messrs. Hubbard «S: Schwarz record unipunctata from the lower peninsula 

 of Michigan, but do not state which form was taken. Montreal is the 

 only Canadian locality from which I find Physonota recorded. In D'Ur- 

 ban's lisrt of Montreal Coleoptera (Canadian Naturalist, vol. 4, p. 307) he 

 gives Cassida tmipunctata as common on the Mountain. This probably 

 would be helianthi, as I have found it common on Montreal Mountain, 

 but have never met with a typical specimen of icnipunctata. 



I hope that entomologists will look out for these species during the 

 coming season, and if successful, let the readers of the Entomologist 

 have the benefit of their observations. 



The food plant was kindly determined for me by Dr. J. B. McConnell. 



NOTE ON XIPHYDRIA ALBICORNIS. 



BY W. HAGUE HARRINGTON, OTTAWA. 



This species was abundant from the middle of June to the end of 

 July, and I observed the females ovipositing on our shade trees (maple) 



