122 RHOPALOCERA. 
anticas restricta, interdum ad angulum posticarum analem extendente, interdum fere alas totas (marginibus 
exceptis) occupante, cyanea ; subtus fere ut in M. peleide, anticarum triente apicali griseo magis notato. 
Hab. Costa Rica (Van Patten 145); Panama, Chiriqui (Arcé). 
Owing perhaps to contact with M. peleides, this insect is variable in the amount of 
the blue of the wings. In Mf. marinita the amount is least and is restricted to the 
primaries; in M. hydorina the blue occupies both wings as a broad band, leaving the 
base of the wings rich brown; between these comes I. limpida with the blue of less 
extent. Mr. Butler, after having divided the specimens in Dr. Van Patten’s collection 
into these three, seems afterwards to have reconsidered the matter and united M. limpida 
as a variety of MW. hydorina. In our opinion he might have gone further and united 
all three under M. marinita, as we now do. We have examined a very extensive 
series of this Morpho, of which the six-and-twenty specimens in our collection are but a 
part; and we do not hesitate to say that, if any separation were to be made, nearly every 
specimen would have to bear a name. To adopt such a course would be absurd; and 
the only other alternative is to unite them all. Mr. Butler’s figures show the extremes 
of variation as known to him; but we now have specimens from Chiriqui in which the 
blue encroaches so much on the brown base of the wings as to threaten its absorption, 
and thus the passage into P. peleides seems at least possible. 
Subfam. BRASSOLINA *. 
DYNASTOR. 
Dynastor, Westwood, Gen. Diurn. Lep. p. 346 (1851). 
Four species are included in this somewhat peculiar genus—the well-known D. napoleon 
and D. darius, with which we place D. macrosiris and D. strix, two species that have 
hitherto stood under the genus Brassolis. We have not been able to make dissections 
* We use this name precisely in the sense given it by Mr. Bates (Journ. Ent. ii. p. 176). It includes the 
genera of Professor Westwood’s family Morphide which have a prediscoidal cell in the secondary wings and 
the cell itself closed. So far as we can see, the Central-American genera should be grouped somewhat as 
follows :— 
Dynastor and Brassohs have a moderately large prediscoidal cell in the secondaries, and both have an 
extremely short terminal joint to the palpi; but they may be distinguished by the difference in the form of 
the club of the antennz, and other characters. 
Opsiphanes is in many respects like Dynastor, but has a larger prediscoidal cell and a longer terminal joint 
to the palpi. The secondary sexual characters of the male also resemble those of Dynastor. 
Caligo and Eryphanis both have a small prediscoidal cell and somewhat similar secondary male sexual 
characters as distinguished from Opsiphanes ; but these are recognizable znter se. 
Narope stands alone in the peculiarity of the male characters ; the prediscoidal cell is very large. 
There are other South-American genera, which require further examination before the whole can be 
satisfactorily arranged. 
