AMERICAN PHILOSOPHICAL SOCIETY. 591 



to the scutel, and the anus is tridentated, the middle tooth being- 

 more slender and acute. A variety in my collection is destitute 

 of the punctured striae of the elytra. 

 [Also a Dkerca. — Lec] 



4. B. OBSCURA F. (and Melsh. Catal.) 



Herbst says the side of the thorax is rectilinear, not arcuated. 

 This would agree better with lurida F.j my specimens of oh- 

 scura are rectilinear only from before the middle to the base. 



[Also a Dicerca. — Lec] 



5. B. dentipes Germar. — This is the character istica of Mel- 

 sheimer's Catalogue ; but, as no mere catalogue can establish a 

 name, Germar's must be of course retained, because it is the first 

 name recognized by a description. 



[This and the two following belong to Chrysohothris. — Lec] 



6. B. hybernata F. — From the specimen in my collection, 

 I am led to belieye that the Ittjhcrnata F., is but a variety of the 

 frontalis Olivier, and that both have serrate elytra ; but I have 

 not at present the means of referring to Olivier's work. My 

 specimen is reddish purple ; thorax immaculate ; elytra serrate, 

 with but five green spots ; and the anterior thighs are armed 

 with a prominent tooth. 



7. B. sexguttata nob. (Journ. Acad. Nat. Sc.)— This name 

 being preoccupied by Herbst for an American species, we change 

 it to sexsignata. 



8. B. GiBBicoLis nob. (Journ. A. N. S.)— This name is pre- 

 occupied by Illiger for an European species, it must therefore be 

 changed. 



[A species of Ptosima, ante, 104. — Lec] 



9. B. PULCHELLA Herbst.— The volvulus F., is probably the 

 same species ; but which of the two names has the priority I 

 cannot now ascertain, not having the date of Herbst's volume. 

 There is some confusion amongst the species of the small group 

 to which this belongs, in consequence of the short descriptions 

 of Fabricius. Herbst's description of this species cannot well 

 be mistaken. I have found it in Pennsylvania, [159] Florida 

 and Arkansa. It is the ornata of Dejean's Catalogue; and 

 1836.] 



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