192 LETTERS FROM DR. HARRIS. 



men, &c. They all belong to the same group, distinguished 

 by the brush-like clothing of the hind legs. 



In case of my being able to make arrangements for going 

 to Cleveland about the 18th of August, I will give you 

 seasonable notice. 



Respectfully Yours, 



Thaddeus William Harris. 



Cambridge, Mass., February 15, 1853. 



Prof. J. P. Kirtland: 



Dear Sir — The specimen of Lihythea 

 Bachmanii was duly received, {minus both antennas, no 

 relics of which remain,) as were also the cocoons of the 

 insects that have destroyed many of your lepidopterous 

 larvae. 



Your letter, dated East Rockport, January 3d, (why not 

 Cleveland?) also came to hand on the 12th of January, and 

 ever since I have been expecting to receive the Lepidop- 

 tera, which you stated were to be sent by your neighbor, 

 Mr. Hotchkiss, but which have not yet arrived. 



The parasitical cocoons are probably those of one of the 

 Ichneumons minuii^ perhaps of a Microgaster^ allied to 

 Ichneumon {Microgaster) glomeratus^ L. It is very pro- 

 voking, when one has carefully tended some ^are larvae, 

 to have it languish and give forth a host of intestine enemies 

 like these Microgasters, which put an end to our hopes of 

 obtaining perfect specimens from •our cherished larv^. 



Your Lihythea is identical with a specimen which I took 

 in my little garden on the 24th of June, 1849, — the only 

 specimen that I have heretofore seen here. I have no 



