MYLOTIIRITES PLUTO. 45 



The design of the upper surface of the fore wing (PI. II, fig. 17) is simple, 

 consisting only of a broad marginal pale band on a dark ground, enclosing small 

 dark spots in the middle of the interspaces. 



This fossil was placed by Heer among the Nymphales, and referred, like the 

 preceding, to Vanessa. Heer lays stress on the non-closure of the cell, but it 

 appears questionable whether this is not simply the result of the defective preser- 

 vation of the fossil. Edwards has since referred it to Argynnis, on account of 

 the general aspect of its markings, and Butler, on the same ground, to Junonia. 

 But the new drawing of the fossil obtained for me through the kindness of my 

 friend Herr Brunner von "Wattenwyl, and by him carefully compared with the orig- 

 inal, leave little doubt that it is a Pierid, and belongs in the neighborhood of such 

 genera as Mylothris and Hebomoia. The latter genus it closely resembles in 

 the form of the Avings. Further comparisons are presented under the species. 



MYLOTIIRITES PLUTO (HEEII) SCUDDER. 

 Plats II, figs. 2, 7, 17 (15?). 



Vanessa Pluto HEER, Insekt. Tert. (Ening., ii, 170-82, Taf. 14-, tig. 4, 5 (?) (1849); In., Nouv. Mem. Soc. 

 Helv., xi, 179-82, Tab. 14, tigs. 4, 5 (?) (1850); GIKB., Deutschl. Petref. 044 (1852); IB., Faun, der 

 Vorw., 186-7^(1856) ; PICT., Traite do Palieont., ii, 393, pi. 40, fig. 21 (1854) ; LYELL, Elem. Geol., 6th 

 Ed., 243, fig. 179 (18G5). 



Argynnis Pluto EDW., Butt. N. Amer., i, Argynnis I, fig. (1868); KIRB., Syn. Cat. Diurn. Lep., 155 (1871). 



Junonia? Pluto BUTL., Lap. Exot., 127-28, pi. 48, fig. 7 (1873) ; IB., Geol. Mag., x, 3-4, pi. 1, fig. 7 (1873). 



Heer's description of this insect is as follows: 1 



Alis griseo-nigris, anterioribus margine posteriore ocellis sex pallidis. 



Lange des Vorderniigels wahrscheinlich 15 Lin; er 1st erhalten bis zu 14 

 Lin; grosste Breite 8-f Lin. 



Radoboj. Ein ausgezeichnet schones Exemplar in dem k. k. Hofkabinet zu 

 "Wieu; leider fehlt aber der Ivopf, der Hinterleib, der grosste Theil der Hinter- 

 niigel und die Spitze der Vorderfliigel [PI. II, fig. 2]. 



Der Brustkasten 1st langlich oval, in der Mitte zwei Linien dick, an der 

 Oberseite von ein paar Streifen durchzogen. Der Oberfliigel 1st am Grunde 

 schmal, nach dem Hinterrande bin aber stark verbreitert und erreicht daselbst 

 seine grosste Breite. Die Ausseuraudlinie (v. marginalia) 1st sehr stark gebogen, 

 und zwar bildet sie vom Grunde zur Spitze eine regelmiissige, starke Bogenlinie. 



' Insekt. Tert. CEning., II, 179-82. 

 MEMOIRS A. A. A. S. 8 



