52 



HENTZ TO HARRIS. 



Chapel Hill, N. C, Jan. 19, 1829. 



Your letter, dated Jan. 16, arrived this morning, and gave me 

 great pleasure. Latreille says about Tillus : "Ow la majeure 

 jyartie des aoitennes est en forme de scie."'' In my 874 the an- 

 tennae are filiform, the last joint only being large and fusiform. 

 That is the reason why I did not place it in that genus. Cylid- 

 rus is the name of a o-enus established bv Latreille, I know 

 not in what work, given in the Dictionnaire classique d'histoire 

 naturelle thus : " Tarses de o articles distinctes ; antennes forte- 

 ment en scie, dejyuis le t^""" article inclusivement ; le dernier des 

 palj^es tres long ; celui des maxillaires de la grosseur des pre- 

 cedens, cglindrique ; le meme dans les lahiaux en forme de cdne 

 renversc et allonge ; mandihules longues et croisees ; tSte allongee, 

 corps long et cylindrique. Ce genre se comjwse d''u7ie seule 

 esjjece, Trichodes cganeus, Fabr.^^ 



The antenna} of my insect, it is true, do not agree, but I have 

 another species marked in my catalogue 860, where the antenna? 

 arc " en scie depuis le 5"" article inclusivement,^^ and this closely 

 related in every other particular to 874 ; only the mandibles 

 seem to be lono-er, which would be an additional character 

 to place it in Cglidrus. I say " seem to be longer," because this 

 being a unique, I have not dissected it, but the mandibles 

 are certainly crossed. I am still in doubt about these two in- 

 sects, and shall be glad to receive your farther suggestions 

 about them. Your Tapheicerus seems different from my 133. 

 The groove is not so deep in front, it is true, as at base ; 

 but when you turn the head towards you the outline of the 

 thorax yn-escnts a perfect bow. On the subject of the Cicindela 

 of Pemisvlvania, I will extract the followinoj from my iournal : 

 *'No. 3. This can scarcely be the deccmnotata of Say. The 

 front is not hairy, the bilobate disk of the thorax not cupreous, 

 the scutel not blue ; elytra green all over. The refracted band 



