263 



the journey from Portland to Franconia was taken in a private 

 carriage, I had opportunity to stop whenever and wherever 

 I wished. 



HARRIS TO LE BARON. 



Cambridge, June 23, 1851. 



A new insect, alHed to Coccus and congeneric with the Lin- 

 nean species of Chermes^ which do not leap (two or three of 

 which are noticed by Linnaeus), has appeared on the Scotch 

 Larch, but has not attacked the American Larch. Hence I in- 

 fer that it is an imported insect. I have searched in vain for the 

 males. The females, which are very small, lay a considerable 

 number of eggs, attaching them by threads to the leaves and 

 twigs, but they do not brood over them. When these females 

 begin to lay they are covered Math a white, flocculent sub- 

 stance ; but their form is very different from Dorthesia and the 

 allied genera. Reluctant as I am to do so, I shall have to give 

 the insect a new generic name. It seems to be intermediate 

 between Aphis and Coccus^ being wingless like the latter, yet 

 not sedentary and fixed upon its eggs, but having the power 

 of moving about like the Aphides. It cannot wiui any propriety 

 be retained in the genus Chermes, from which it differs in all 

 essential characters. 



HARRIS TO HIGGINSON. 



[Dated a little before the death of Dr. Harris.] 



I mourn for the loss of many of the beautiful plants and 

 insects that were once found in this vicinity [Cambridge]. 

 Cletlird, Rhodora, Sanguinaria^ Viola debilis, V. acuta, Dracccna 



