LASATIA, 455 
subcostal at the same point as the upper radial, the lower the median a little beyond 
the second branch; the costal and median sides of the cell are nearly equal. The 
secondaries have a strong basal nervure; the discocellulars are atrophied, the upper 
meets the median a little beyond the first branch, the costal side of the cell is a little 
shorter than the median side. 
The front legs of the male have the trochanter inserted about the middle of the 
coxa; the femur =} coxa; tibia =% coxa; tarsus long >3 coxa, there is a constriction 
near the end indicating a rudimentary joint, and a strong seta at the extremity. 
Palpi have a long terminal joint >4 middle joint. The eyes are hairy. The 
antenne have forty-three joints, of which the terminal eighteen form a slender club. 
The harpagones in the secondary sexual organs of the male are bilobed, each setose 
at the extremity, the lower lobe is broad, the upper one somewhat pointed and 
directed upwards; there is a central arch over the penis, and the strap proceeding from 
near the base is directed outwards to beyond the harpagones, it then returns abruptly 
to their base, at the bend the strap is spead out vertically, and on its top there is a pad 
of strong papille directed outwards. 
1. Lasaia meris. 
Papilio meris, Cram. Pap. Ex. t. 366. B, C’. 
Lasaia meris, Bates, Journ. Linn. Soc. Zool. ix. p. 445°. 
Erycina agesilas, Latr. in Humb. & Bonp. Obs. Zool. i. p. 251, t. 25. ff. 7, 8°. 
Alis glaucis nonnunquam fuscescentibus, maculis transversis nigris frequenter notatis ; subtus fusco-violaceis 
aut ochraceis, fascia submarginali communi pallidiori, lenticulis plurimis nigris interspersis. 
© mari similis sed alis fuscescentioribus. 
Hab. Mexico, Oaxaca (Fenochio), Valladolid in Yucatan (Gaumer) ; GUATEMALA ?, 
San Gerdnimo, Chisoy, Polochic valley (Ff. D. G. & O. S., Champion), Panima (Cham- 
pion); Nicaragua, Chontales (Belt); Costa Rica, Cache (fogers); Panama, Chiriqui 
(Arcé), Bugaba (Champion).—Sourn America, Colombia? and Amazons valley ® to 
Brazil. 
This is a very variable species, as regards the tint of both surfaces of the wings; 
but we are unable to trace any definite lines of difference between the extreme forms. 
The number of back spots and their size also vary, and in some specimens, especially 
towards the costal margin of the primaries, the spots become confluent. | 
L. meris appears to be an abundant species throughout Tropical America, and we 
have specimens from all parts of our region from Mexico to Panama. 
It is of a different habit from most of its allies, being found about the banks of 
rivers in thinly wooded districts, where it is fond of settling on the damp sandy margins 
or upon partly submerged rocks. It is a very active species on the wing, and difficult 
to capture (Champion). 
