336 RHOPALOCERA. 
sense, so far as some of the Central-American species are concerned, we get the 
following results :-— 
A. Three slips from costal to costa; first and second subcostal branches uniting 
with costal; third branch divided, one slip uniting with the costal, the other 
passing to the outer margin: glycertum, nobilis, ryphea, pithyusa, electra. 
B. Two slips from the costal to the costa; first subcostal branch atrophied, second 
and third united to costal, fourth free: aidea. 
C. Two slips from costal to costa; first and second subcostal branches united to 
costal; third divided, one slip uniting with costal, the other passing to the 
outer margin: dza. 
D. Two slips from costal to costa; first subcostal branch absent; second united to 
costal; third divided, one slip joining costal, the other passing to the outer 
margin: echemus. 
EK. One slip from costal to costa; first subcostal atrophied; second and third 
united to costal; third divided, one slip joining costal, the other passing to 
the outer margin: senocles. 
In all species of Anwa there is a lower discocellular closing the cell of the primaries. 
This joins the median some way beyond the origin of the second branch; an evanescent 
nervure also closes the cell of the secondaries. The front legs of the male (4. glyce- 
rium) have a coxa =% femur + trochanter, tibia =}? femur; tarsus single-jointed, 
= tibia. In other species of the genus there is some variation as to the relative 
strength of the joints, but the general proportions seem to be maintained. The 
terminal joint of the palpi is short in A. glycerium and A. dia, and in most species 
about = the middle joint; in A. electra about =}; the middle joint is of nearly 
uniform width throughout and rather stout. The antenne have 39 joints (A. glyce- 
rium), 54 (A. dia), 41 (A. nobilis), 43 (A. electra), 38 (A. ryphea), 47 (A. xenocles), 
4] (A. pithyusa), 43 (A. aidea). 
The structure of the male secondary organs is tolerably uniform. In A. glycerium 
the tegumen terminates in a slightly depressed spine, and there is a pair of dependent 
strong outwardly directed spines below it; the harpagones are simple lobes with a short 
spine slightly bent inwards at the end. In 4. dia there is a dense pencil of hair-like 
scales at the end of the harpagones; in JA. electra this pencil is present, but not the 
terminal spine. Of the species examined, A. aidea departs furthest from A. glycerium 
in respect to these organs; the two spines below the tegumen, and dependent from it, 
are long and turned upwards, and their ends are cleft into two points instead of re- 
maining a single one; the harpagones are longer and more curved, and not so elliptical 
in outline. 
