62 



in the Dictionnairc classique d'histoire naturelle, article 3Io- 

 rioji, that I think it probable that it was taken from my insect. 

 The antennjB are considerably flattened in the middle, so as to 

 appear larger in one direction ; and the tarsi of the third pair 

 of legs are much more robust, and thicker than the rest in both 

 sexes, — characters which, with the preceding one, have escaped 

 the notice of Mr. Say, and yet are important ; for tlie last, if 

 common to all the species of this genus, ought to be considered 

 generic, as it is not a common one. 



March Sth. 



No. 814 [814 Hentz's mss. Catal. = Ulodes ? fragilis] I 

 agree with you in thinking nearer Dascillus than diodes, as the 

 mandibles are not much concealed under the labrum, but the 

 last joint of the palpi is not what could be called '•'•tronque ou 

 tres ohtiisy 



I have now no less than six distinct species congeneric with 

 No. 807. [807 Hentz's mss. Catal. r=: Mycetoijliagu% jounctatus 

 Say.] When you see them all I think you will be convinced 

 that they are distinct from Mijcetojylicigus Fabr. By the by, 

 what genus of Latreille do you mean ? Is it Eustrojjlms ? If 

 that be the case, I think I have three species to which the name 

 applies better. One of them you marked JaustrojjJius hieolor ? 

 To those the characters given in the Dictionnairc classique 

 d'histoire naturelle '■'-tete tras penchee'^ applies very well. I 

 have two more species to which all the characters of Eusirophu8 

 apply except tliis, " et dont aucun des articles^^^ (speaking of 

 the antennae) a par^/r du 3'"" n^cst lenticidaire "; tliey having 

 slightly perfoliate and moniliform antenna?. These Aa'c species 

 have the body more or less attenuated behind. But besides 

 these I have two species, one of wliicli, No. 448 [448 Ilentz's 

 MSS. C>'c\tiv\.=^ Diaper is hieolor ? Fabr.] you have. I liad marked 

 that one M. hieolor Fabr., and the other M. fiavipcs. They are 

 both nearer Diaperis than any of those mentioned above. 



