THE CANADIAN ENTOMOLOGIST. 215 



Hemaris (Sesia, Grote, restr.) and Haemorrhagia, and had described six 

 out of the nine species previously catalogued, I was not struck with any 

 impropriety on the part of Mr. Strecker in submitting his material for 

 determination to me. Mr. Strecker's letter is as follows * : 



Reading, March 13, 1873. 

 Dear Mr. Grote, — 



I am in a muddle with my Sesidae. In your catalogue you have 



thetiSy diffinis, axillaris, gracilis, buffaloensis, thysbe, fusicaudis, Floridensis > 



those underscored I know, the others I don't know by a shot and a half. 



I have read your description of axillaris, and I think I have it, but ain't 



sure. Here is the way they are in my collection : 



1. Diffinis. 



2. Like Diffinis, but margin of fore wings slightly scolloped inside. 



3. Like Diffinis, but margin acutely dentated inside and broader ; 

 from Michigan. 



4. Thetis. 



5. Thysbe. 



6. Like Thysbe, but margin of wings not dentated inwardly ; abdo- 

 men more robust, not so long ; from Labrador. No. 6 may be Buffalo- 

 ensis ; I thought I had Buffaloensis, but if this^be it not, then I have not 

 that species ; can't you get me an example of it and gracilis ? 



What are fusicaudis and Floridensis ? Where can they be seen ? If 



1 could borrow the examples not in my collection I would figure the 

 whole lot of them, all the N. Am. Sesias on one plate, and with your aid 

 in the accompanying text the world might be set to rights on that bother- 

 some genus as far as the N. Am. species are concerned. Can you help 

 me to get the material for my plate ? also, can you tell me what my Nos. 



2 and 3 are by what I have written above. 



Write soon to yours truly, 



Herman Strecker, 

 Box in, Reading P. O., Berks C'y, Pa. 



I wish, at least for the moment, to " let the whole thing drop 

 together," as Air. Andrews suggests, with the following note from Mr. 

 Andrews, which is rather different in tone from those printed on pages 



* This letter is set up from the original. In Mr. Grote's communication, pp. 

 176-177, for "Heman's" read everywhere "Hemaris." — Ed. Cast. Ext. 



