32 



setiferous varioles on the disk, and circular crowded ones on, 

 the margin ; hairs long, yellow, depressed.^ 



Length, nearly ^^ of an inch. 



The tufts of ferruginous hairs within and beneath the tho- 

 racic tubercles and emarginations, as well as the small, umbili- 

 cated, anal tubercles, appear to be common to all the species 

 of this genus. 



You are certainly correct in separating Clirysomela rhois 

 Forster, from the genus AUlca, in which I had incorrectly 

 placed it from its possessing saltatory powers. The situa- 

 tion of the antennas does not correspond with that of Al- 

 tica; and this insect, with your allied species, may, for the 

 present, be placed in a subgenus of Ckri/somela, forming the 

 connecting link between Altica and Chrysomela in having the 

 incrassated saltatorial thio;hs of the former with the distinct 

 antennae of the latter. 



Harris to hentz. 



Milton, Sept. 3, 1827. 



Are you not tired of the name Chremastocheilus? Neverthe 

 less, I will once more beg youi' patience for a few minutes. 

 The very hurried manner in which I examined the Carolinian 

 insects for which I am so much indebted to you, must excuse 

 me for so readily taking the specimen of Chremastocheilus to 

 be identical with the one forwarded in your letter. A more 

 careful examination has nearly convinced me that it must 

 be distinct. The specimen last received has the posterior 

 tubei'cles of the thorax formed precisely like those of C 

 llentzii ; it has also on one elytra a whitish spot, which at 

 first sight would appear to be fortuitous, but the microscope 

 shows on the other a corresponding spot, which, cursorily ex- 



• 



1 What are the most characteristic differences between this and C. Sayif 



