246 PROCEEDINGS OF THE AMERICAN ACADEMY 



836. Perisama. 

 1849. Doubl, Gen. Diurn. Lep. 240: Bonplandii, Lebasii, D'Or- 

 bignyi (D'Orbignii), Euriclea, Humboldtii, Oppelii, 

 Philiuus ? and a MS. species. 

 1861. Feld., Neues Lep. 20: no species are cited. 

 1871, Kirb., Syn. Cat. 208 : follows Doubleday and adds other 

 species. 

 Bonplandii may be taken as tlie type. 



837. Perophthalma. 

 1851. "Westw., Gen. Diurn. Lep. 455 : tenera. Sole species, and 

 therefore type. 



838. Perriiybris. 

 1816. IlUbn., Verz. 91 : Pyrrha (Eueidias), Medusa (Epimedusa). 



1867. Herr.-Schaeff., Prodr. ii. 10 : employs it for a large number of 



species, including Pyrrha, but not Medusa. Pyrrha is 

 therefore the type. 

 1871. Kirb., Syn. Cat. 478: follows Herrich-Schaeffer. 



839. Petavia.* 



1828. Horsf., Descr. Cat. Lep. E. Ind. Co. 50, expl. pi. 2: Pctavius 



(Sakuni). 

 This name falls, because derived from tlie species on wliicli the genus 

 is grounded. Moreover, we have notliing to do witli it here, as it is not 

 a butterfly. 



8*40. Petreus.* 

 1832-33. Swains., Zool. 111. ii. 110: Pt7e?<s (Thetys). Sole species, 

 and therefore type. 

 The plate consists solely of tlie earlier stages of a butterfly, belong- 

 ing to the Tribuni. The characters of the group are drawn up partly 

 from the perfect insect (represented on pi. 59, and referred to Marius, 

 while here to the subgenus Petreus, — a nymphalideous insect) and half 

 from the caterpillar, belonging, as stated, to a totally different grOup ! 

 The name therefore must be dropped altogether. Moreover, Petreus is 

 one of the synonymes of Peleus. See also Athena. 



841. Pn^DRA.* 



1829. Horsf., Descr. Cat. Lep. E. Ind. Co. 123: Thefys (terricola, 



insularis). Sole species, and therefore type. 



1868. Herr.-Schaeff., Prodr. iii. 19: employs it for a large number 



of species, including Thetys. 

 The name is taken from one of the synonymes of the species upon 

 which the genus is grounded, and therefore it must be dropped. See 

 Curetis, Anops, and Candalides. 



