PIERELLA.—ANTIRRH EA. 69 
P. incanescenti similis, sed anticis ocello nigro ad apicem minutissimo (aliquando absente); posticis macula 
alba subquadrata a costa medio ale tenus extendente, secunda subrotunda minore infra eam in colore 
sanguineo posita: subtus fascia obliqua fere alba et posticarum macula infra ocellum majore et rubro 
marginata. 
Hab. Panama, Calobre (Arcé*), Lion Hill (/Leannan 12), 
As already stated, this is a close ally of P. incanescens and P. helvina, differing 
mainly but obviously in having a large white spot on the secondaries. In this respect 
it resembles the Brazilian .P. nereis, a point of some significance when the frequent 
relationship of Central-American and Brazilian species is considered. 
P. ocreata enjoys a limited range in the State of Panama, bounded on both sides by 
that of P. incanescens; but the two forms, so far as we know at present, do not in any 
way intermingle. 
Our figures and descriptions are taken from Panama specimens, some of the original 
types. 
ANTIRRHEA. 
Hetera, Div. B. Antirrhea, Westwood, Gen. Diurn. Lep. i. p. 865 (1851). (Type Papilio philoc- 
tetes, Linn.) 
Antirrhea auctt., Butl. Cat. Sat. B. M. p. 107. 
The name Antirrhea was first introduced by Hiibner, in the second volume of the 
‘Sammlung exotischer Schmetterlinge,’ and applied to A. archea alone. This species 
was afterwards placed by Westwood in a section of Division B of the genus Hetera, 
the other section containing Hetewra philoctetes. Mr. Butler, noticing that these two 
sections really constituted two distinct genera, made a new name, Anchipledia, for 
A. archea and its allies, leaving A. philoctetes in Antirrhea, when the opposite course 
should have been taken and the new name bestowed upon A. philoctetes and its allies. 
As, however, the name Antirrhea has so long been associated with the insects Mr. 
Butler places under it, we hesitate to disturb matters; still we cannot help feeling that 
Hiibner’s original application of his name ought to be respected, accompanied as it is 
with an excellent figure. 
With Hetera Antirrhea has little in common. The anterior wings of the male 
have the submedian nervure curiously arched ; and on the inside of this nervure beneath 
is a row of long hairs which curl upwards and meet in a point, the posterior wings 
having a patch of peculiar scales to correspond. The secondary sexual male organs 
are singularly formed ; the upper piece or tegumen has a long decurved spine, but no 
lateral projections; whilst the harpagones are prolonged into long upturned and 
slightly recurved rods which are strongly serrate on their inner edge. This arrange- 
ment is very different from what is found in Hetera and its allies. 
Seven or eight species are now known of this genus; of these, three come within 
our limits, one of which extends as far north as Guatemala. Of the South-American 
