Notes on the Commoner Species 191 



rather foul water, under an apple tree in a chicken 

 yard. There were three developments of this species 

 observed by him in the same receptacle, and in no 

 other, although there were over twenty other tubs of 

 water nearby. As his specimens deposited single 

 eggs, the three developments, which were in small 

 numbers, in the one tub, may have all been from the 

 same batch. Mr. H. Marsh found them near Chester, 

 N. J., in a tree hollow, September 5, in company with 

 triseriatas, and again October 3. They were fully 

 mature in both cases, and of the September lot some 

 were already in the pupal stage, most of the adults 

 appearing within a week. I captured some in a tree 

 hole near Washington. They were pretty larvae, 

 having a rosaceous tint of the upper part of the thorax 

 and abdomen, the sides of the thorax and body being 

 a translucent pearl grey. The rosaceous colour is 

 caused by the air gleaming through the dark air tubes, 

 which, in most larvae, are less heavily chitinised, more 

 transparent, and show silvery. In some lights the 

 tracheae of this species shine like polished copper. 

 The rosaceous colour deepens toward the tail. The 

 head is dark brown, almost black, while the golden- 

 yellow mouth brushes contrast sharply with it. 



Lepidoplatys sylvicola, etc. — These were taken 

 in Baton Rouge from April 8 to May 7. They bit 

 but once and a few laid one batch of single eggs, 

 about one hundred and forty-six eggs in the clutch. 

 They oviposited in from one to eight days after biting, 

 then died. None of the eggs hatched. They are 

 found in the woods, but rarely. This species is also 

 found in California as well as in New Jersey, and 



