19 



of twenty miles, or even more, if certain of obtaining a speci- 

 men, and I think Mr. Say would be willing to walk that 

 distance for the sake of finding one. 



HENTZ TO HARRIS. 



NORTHAMPTON, July 30th, 182G. 



Mourn no longer for the solitude or singleness of your Am- 

 pliicoma vulpina ; I have found another, which, though rather 

 darker in color, is a perfect specimen, and has its posterior 

 tarsi. Those tarsi are like the rest, entire, equal, slightly 

 toothed at their base. You shall see it when I go to Milton, 

 along with a number of very interesting insects, among which 

 you will see with pleasure two new species of Melolontlia (new 

 to me I mean) ; both are larger, or as long, at least, as any 

 other American species ; one is closely analogous to the M. fullo 

 of Europe ; do you know it ? The other is covered with very 

 close hairs over the elytra and thorax, and resembles no species 

 which I know. I believe, with you, that the Tricliius eremicola 

 and scaber ought to form a new division ; they differ in every 

 respect from that genus. 



I thank you for the characters of the genus Malaclims given 

 me. by you. I think I will figure them all, as the male of the 

 M. quadrimaculatus differs so much from the female. I have 

 found two males this season, and observed the difference in the 

 tarsi. I have another species of that genus which seems to be 

 new also. If so, I shall have quite a paper upon that genus and 

 the Antlticus. I have found one more specimen of my Antlii- 

 cus ancJiora. Will you think of looking for that spider which 

 you found on trees near the water ? Observations on that 

 subject would be highly valuable. It would be quite anoma- 

 lous for that species to spin any web and abide on trees ; as 

 much so as for a Cicindela to feed on the nectar of flowers. 



