356 
[December 
member of the genus whose wings were not angular, and to include 
such species in a group, the name of which indicates angularity as one 
of its prominent characteristics, would be preposterous. 
G. Leachiana^ I have never seen, but from its nervular structure as 
shown in the Genera of Diurnal Lepidoptera, I should include it 
under the same type. 
1. K. lyside, Godt. 
Col. Lyside. Godt. Enc. M. IX, p. 98, n. 30. (1819.) 
Menetries. Mem. de la Soc. Imp., &c. Ill, p. 119, n. 8. (1831.) 
Lhod. Lys. Boisd. Sp. Gen. I, p. 603, n. 7. (1836.) 
Cat. Brit. Mus. VIII, p. 37. (1844.) 
Morris’ Synopsis, p. 24, n. 2. (1862.) 
Gonep. Lys. Doubled, and Hewits. I, p. 71, n. 6. (1847.) 
Costa Rica. 
MEGONOSTOMA, nov. gen. 
Head, moderately broad, clothed with rather long hairs. 
Eyes, oval, projecting. 
Labial palpi, longer than the head, clothed with short scales ; 
first joint, curved) second, cylindric, oval, as long as the first) third, 
minute. 
Antennse, short, rather stout) thickening from the lower third to 
the Apex, which is truncate) arcuated. 
Thorax, stout) clothed, in front densely, with fine hair. 
Anterior winds, sub-triangular, apex, acuminate or almost falcate) 
the apical nervule terminating exactly in the summit) costa, curved) 
costal nervure, very stout) sub-costal, four-branched) its first nervule 
thrown off about the middle of the cell) the second at the end of the 
cell) the third much nearer to the apex than to the end of the cell; 
first discoidal nervure, united to the sub-costal, one-third or one-fourth 
its length beyond the cell) lower disco-cellular nervule . about four 
times the length of the middle disco-cellular. 
Posterior wings, sub-triangular, angles rounded, shoulder very 
prominent. Discoidal nervure appearing as a third sub-costal nervule : 
lower disco-cellular nervule, twice the length of the upper. 
ikBDOMEN, rather stout, not so long as the inner margin of the pos¬ 
terior wings. 
Legs, rather stout, tarsi, very long and spiny) females furnished 
