THE CANADIAN ENTOMOLOGIST. 231 



of the chrysalis, and then remained distended, with its forks in shape. 

 The nature of this organ must be determined by further observations. 

 I had sent to a friend, who is an experienced mieroscopist as well as ento- 

 mologist, a chrysalis of interrogationis which had been dropped in 

 glycerine at the crisis of pupation, and he writes me thus: "I have 

 examined the preparation, which was in good condition except the 

 separation of the chrysalis from the skin. I see what you call the two 

 ridges, which exist also in the caterpillar and have between them the anus 

 in both caterpillar and chrysalis. Further, I find connected with the skin 

 the whole rectum, and a little more of the intestinal canal, drawn out in 

 pupation. A little below I see a substance which I suppose to be your 

 membrane, about as long as the rectum and structureless. I would sup- 

 pose that the membrane belonged to the rectum and perhaps the external 

 cover of it, if you had not written that the membrane in anhippus is 

 black. I took a caterpillar (in spirits) of this species, and opening it, 

 found that the rectum was white, or at least light colored. One should 

 make a section of the caterpillar of archippus just after suspension to 

 discover where this black membrane comes from. The use and purpose 

 of the knobs and bars in the chrysalids is doubtless this : in these organs 

 are built up and developed the anal appendages of the imago." 

 September, 1878. 



NEW N. AMERICAN LEPIDOPTERA, WITH NOTES ON A 



FEW LITTLE KNOWN. 



BY A. R. GROTE, A. M.. 



Director of the Museum, Buffalo Society Natural Sciences. 



Daremma catalpae. 



Sphinx catalpae Boisd., pi. 2, figs. 1, 2 (1S74). 



This species is represented in the Collection of Mr. E. L. Graef by 

 an example from Florida. It is smaller and darker than D. undulosa or 

 D. Hageni, of a uniform butternut or olive brown tint. 



