774 MR. A. G. BUTLER ON THE GENUS l'ROTOGONIUS. [Dec. 2, 



trifid, oblique subapical band (its lower extremity excised in front), 

 a large spot almost touching tbe latter on second median interspace, 

 and a small spot near margin on first median interspace, all yellow ; 

 secondaries tawny, with moderately broad external black-brown 

 border, becoming obsolete at apex, but broadest at anal angle, and 

 enclosing four ochreous oval spots ; wings below very similar to 

 P. cecrops, but duller in colour. Expanse of wings 3 inches 5 lines. 



Bogota (Stevens). B.M. 



Mimics Melincea tachypetis of Felder. 



6. P. TITHOREIDES, n. Sp. 



Primaries above very similar to those of P. cecrops in general ap- 

 pearance, but with the apex less acuminate ; the outer border of the 

 tawny area yellowish ; apical area exhibiting six yellow spots, one 

 large trifid and oblique beyond the end of the cell, the others forming 

 a submarginal series, the first, fourth, and fifth large, the others mi- 

 nute ; secondaries with a continuous moderately broad black border 

 round costal and outer margins ; five submarginal yellow spots, the 

 first at apex, the others running from discoidal nervure to anal angle ; 

 wings below as in preceding species, excepting that they are duller. 

 Expanse of wings 3 inches 5 lines. 



Bogota (Stevens). B.M. 



Mimics the New-Granadan form of Tithorea megara. 



7. P. ochraceus, n. sp. (Plate LXIX. fig. 3.) 



Wings above ochraceous, including the spots on apical half of pri- 

 maries ; markings arranged as in P. cecrops, excepting that the 

 third division of the oblique trifid band of primaries is almost divided 

 in the centre into two parts, and that there are two large spots be- 

 tween it and external angle ; the basal area of wings tinted with 

 brown ; secondaries with obtuse anal angle ; four lunate whitish 

 submarginal spots ; wings below pale ochreous (brighter on secon- 

 daries), varied with pale lilacine and red-brown ; secondaries with 

 four distinct submarginal white spots, the three lower ones only di- 

 vided by the nervines ; central band red-brown ; markings arranged 

 as in P. cecrops. Expanse of wings 3 inches 5 lines. 



Cayenne (Becker). B.M. 



A peculiarly coloured species ; perhaps a mimic of an undescribed 

 Melincea which we have from Demerara, but not like enough to 

 enable one to form a definite opinion respecting it. 



8. P. lilops, n. sp. 



Similar in general appearance to P. cecrops, but more nearly allied 

 to P. bogotanus ; primaries black-brown, with a broad tawny streak 

 from base to near end of first median branch ; a large, trifid, oblique, 

 yellow patch beyond end of cell, and five large submarginal yellow 

 spots ; the first trifid, the fourth equal to the central division of the 

 first and suboval, the remaining three much smaller, oval ; secon- 

 daries tawny, with the external area from anal margin to end of second 

 subcostal branch black-brown, and enclosing four yellow-edged white 



