Lep idopterological Contrib utions. 371 



Antennae, simple, blackish ; oral organs, head, prothorax, thorax 

 and tegulae as in the female. Seven thoracic black spots, approxi- 

 mate, supra-lateral on the prothorax ; one at the extremity of each 

 tegula; two, between these last, on the thoracic disc, and one cen- 

 trally on the metathorax. Abdomen, largely ochre yellow ; a dorsal 

 series of blackish and sub-cyaneous spots, and, on each side, a lateral 

 segmentary series of black dots ; beneath, entirely white, except 

 some blackish scales before the anus ; anal segment largely black 

 above. Legs, for the most part, whitish ; tarsi, blackish, as are the 

 anterior coxae. 



Expanse, 1.60 inch. Length of body, 0.Y5 inch. 



Habitat. — Mexico (Mirador). 



This highly interesting species is beautifully illustrative of 

 the affinity between the whitish closely and finely scaled Arc- 

 tian genera, such as Eupseudosoma, Grots, Leucarctia, Pack- 

 ard, and Ecpantheria, H'dbner, to which latter genus, E. leucarc- 

 tioides, structurally belongs. It is especially remarkable in 

 simulating the coloration, and in some degree the ornamentation, 

 of Dr. Packard's genus Leucarctia. The yellow abdomen of 

 the male, which is however more entirely so than in L. acraea, 

 Packard, and the yellowish secondaries, are points of more than 

 casual resemblance. The usual annulations of Ecpantheria, are 

 here perfect maculations ; an additional approximation to Leu- 

 carctia, while, conversely, it is the female E. leucarctioides, 

 O. & R., in which the under surface of the primaries is tinged 

 with ochre yellow of a but little lighter shade than that of the 

 male Leucarctia acraea. There is a great uniformity in the 

 caputal and thoracic coloration and ornamentation, which leads 

 us to unite the two individuals, without question, as sexes of 

 one species ; otherwise the differences are great, while still 

 such as we could expect, judging from analogous instances. 

 The main disposition of the macular bands on the primaries is 

 identical in either sex, while their expression is modified. 

 Again, these sexual differences, abstractedly, forcibly recall to 



