194 THE CANADIAN ENTOMOLOGIST. 



larvae were under the bodies of the plant-lice, covered with a thin net- 

 work of silk to keep the woolly secretion of the Aphides away from them. 

 They were only half grown. On another occasion I found two full-grown 

 larvag among the plant-lice in the same position as the first. One of these 

 changed to a chrysalis and I have it now. It is hung up like other chry- 

 salids of the family Lycsenidse, and has a peculiar humped back. This 

 butterfly is always wandering round Alder bushes with a peculiar flopping 

 motion, as though its wings were too large for its body. After I sent the 

 larvae to Mr. Edwards, saying that I thought they fed on the plant-lice, as 

 there were many dead bodies, or skins, of the lice where I found the 

 larvae; I saw in the June (1886) number of the American Naturalist 

 that the larvae probably fed on this species of Aphis, also on Pemphigus 

 /raxinifolii, found on the twigs of beech trees. Next summer I intend 

 to observe the habits of this butterfly and its larvae more closely. 



THE OPERATIONS OF A PREHISTORIC BEETLE. 



BY SAMUEL H. SCUDDER, CAMBRIDGE, MASS. 



Some years ago, I received from Prof G. J. Hinde, of Toronto, a twig 

 of juniper about as thick as, and a little longer than, one's finger, which 

 he had taken from interglacial deposits at Scarboro', near Toronto, and 

 which showed the marks where beetles had bored the surface just beneath 

 where the bark had been. From the same locality a number of remains 

 of beetles have also been found, mostly Carabidae, two of which I 

 described at the time as new species of Loricera and Loxandrus. The 

 others still remain unpublished, but there are none among them which 

 could have made these borings, as these are evidently the peculiar work 

 of some species of Scolytidae, and apparently one of the Hylurgini, 

 though in our very imperfect knowledge of the characteristics of the 

 mines made by existing forms of this family, it is difticult to pronounce on 

 its relations. 



There are parts of at least six different sets of borings on this small 

 twig, and all are evidently the work of one species. The mating-chamber 

 is more or less triangular, generally equiangular or tridentate, one angle 



