64 THE CANADIAN ENTOMOLOGIST. 



sparingly in April and May at sap on the stumps of black walnut, under 

 chips. Black walnut cut from January to April produces on northern ex- 

 posures a flow of sap until June, and by the judicious placing of chips, all the 

 insects that delight in putridity may be taken, and their number is great. 

 If the surface of the stump be hacked unevenly, the minute species will be 

 found in the cracks of the undetached chips. Birch cut in the same way 

 might do as well, as it flows sap abundantly and for a long time. 



Pallodes (silaceus) pallidus Beauv., so abundant in many species of 

 mushrooms, is here entirely paUid, some specimens having the elytra a little 

 infuscate at the sides. As it occurs in Florida it appears so different as 

 not to be readily recognizable by those acquainted only with the pale form. 

 The head is pale ; the thorax has the disk dark piceous, becoming paler to 

 the margin ; the elytra vary from dark piceous to castaneous, the whole 

 upper side being highly polished and iridescent. From Dr. Horn's des- 

 cription of this species in his monograph of the family, one is scarcely 

 prepared for such extremes in colour variation, as this is not greatly 

 emphasized. 



Betarmon bigeminahis Rand. Collectors desiring this pretty little 

 species can beat it sparingly from spruce growing in open places, from June 

 till August. 



C/aotus aphodioides 111., is found in early spring (till May) under 

 the bark of dead standing trees not yet separated from the wood — notably 

 oak; last April (25th) I took more than one hundred individuals from 

 one small tree, from two to eight being packed in one cavity and many of 

 them in copula, as the day was warm ; these beetles were not bred in the 

 place where found, but came there to hibernate. They enter the tree 

 through a hole in the bark that has served the previous summer for the exit 

 of some wood-bred beetle — in the present instance Urographis fasciatus ; 

 they scoop out when necessary some of the borings of the original inhabi- 

 tant between the wood and the bark, and in this excavation pack them- 

 selves closely, leaving the hole by which they entered open. Where their 

 larval life is spent is unknown, but it would appear to be under ground, as 

 many — nearly all — of the beetles had the deep submarginal groove of the 

 elytra filled with white dried mud, giving them the appearance of being 

 surrounded by a pale cincture. Of the other species ( C. globosus) I have 

 found but a single individual ; the principal differences between the two 

 seem to be that in the latter the punctures of the striae are not so close 

 and the margin of the elytra serrate. Should it be found in numbers thes^ 



