194 THE ENTOMOLOGIST. 
of the same, the marginal red spots are changeable ; being rosy- 
pink, when the angle formed by the incident and the reflected 
rays is very acute; orange-scarlet, when this angle is obtuse. 
Lucas’s figure (Lep. Exot. pl. 17) appears to have been taken from 
this southern form; but he does not notice the changeable hue. 
P. Microdamas, Burm. Paraguay, near Asuncion. LKdge of 
a wood: very rave. 
P. Perrhebus, Boisd. Corrientes: many examples sent; all 
caught around trees in the evening. An insect of remarkably 
slow flight. Paraguay; all parts. Hovering over water in woods. 
Nov. to Feb.; scarce. 
P. Agavus, Dru. Paraguay, near Asuncion. In woods; not 
scarce. Nov. and Dec. 
P. Anchises, Linn. Corrientes: about or near trees; flies, in 
general, very high; but frequently settles on flowers in the shade. 
Paraguay; about puddles; rather scarce. Jan. to March. 
P. Polycaon, Cr. From Corrientes, and from Paraguay: 
very rare in both localities. In the latter, taken at the edge of a 
wood, in Dee. ‘ 
P. Torquatinus, Esp. Paraguay: Dec. to Mar. About pools; 
very rare. ; 
P. Lycophron, Hiibn. Corrientes. Two or three examples in 
poor condition sent thence, with no notes. None from Paraguay. 
P. Thoas, Linn. In all the collections from Corrientes, where 
it is evidently an abundant species. ‘The examples are of the full 
dimensions proper to this noble species. None have yet been 
collected in Paraguay, though it is known to range from the U. 
States, through the Antilles, through Guiana, and through Brazil. 
Dr. Burmeister (Desc. Phys. Arg. Rep.—Lepidopt. p. 59) divides 
the species into six sub-species, to all of which he gives names. 
All the Argentine examples he assigns to the one which he 
diagnoses under the name of Thoantiades. But my examples do 
not bear out his distinctions, as being constant. 
Euryades Corethrus, Boisd. Corrientes. Both sexes have 
been received in some abundance. Always observed in the open; 
descending to hover over grass or flowers. Dec. to April. 
E. Duponchelit, Luc. Corrientes : numerous examples of both 
sexes. Habits, localities, and seasons the same as those of the 
preceding. Both are of lofty flight: they rest during the night 
on trees. Both the species of this interesting genus appear to be 
