248 Journal New York Entomological Society. [Voi. xi. 



other genus of HemileucidK that vein 115 arises rather far from the origin of III I, 

 far from the discal veins ; the latter also are oblique, especially the posterior one. 

 Hind wings with the discal veins very oblique, the other veins much as in Ilemileuca, 



Markings : wings all pale, tending to ochreous whitish, the veins being dark, 

 distinct ; no discal spot and no bars, only a submarginal brown line common to both 

 wings. 



There are no long flattened hairs on the thorax. 



The type of this genus is Hemileuca venosa Walker. 



The species is confined to northeastern South America, M. venosa 

 occurring in Venezuela (Caraccas) and Colombia (Bogota). My ex- 

 ample was compared with Walker's type in the British Museum, and 

 the localities mentioned are from the labels in that museum. 



Family Ceratocampid.b, subfamily Bun^in^. 

 Leucopteryx, gen. nov. 



Iviago. - The head is partially concealed by the high overhanging thorax ; it 

 is not prominent ; the front unusually wide between the eyes. The antennae are 

 wanting in my specimen. The vestiture of the front short, fine and wooly. 



Palpi not visible, apparently I -jointed, short, feeble and drooping. Body rather 

 stout ; the vestiture short, the hairs very fine and rather short. 



Fore wings short and broad, not falcate ; costa straight, a little curved towards 

 the apex, which (though broken oft) appears to be rather obtuse and subrectangular ; 

 outer edge shorter than the inner and slightly convex. Hind wings rather long, costa 

 not very convex, apex rounded, outer edge full, well rounded, inner edge rather long, 

 extending a little beyond the end of the abdomen. 



Venation. Closely similar to that of Heniocha terpsichore ; the first subcostal 

 vein (Hi) arising in the same position and ending just before the apex of the fore 

 wing; theoriginof the semi independent vein (ni3) is the same, and the discocellulars 

 collectively made a slight inward angle ; in the hind wing they make a straight line. 



Markings : Ground-color white and pearl-ash gray ; no definite lines on the 

 wings of either pair. On the fore wings a moderately large round discal spot, solid 

 in the center except a narrow, clear, linear chink. On the hind wings no complete 

 ocellus, but a subtriangular, dark, opaJce spot, with a slight linear chink or fissure. 



The type of this genus is( Ceranthia ? mollis Butler, Trans. Ent. 

 Soc. London, 1889, p. 391, PI. 12, Fig. 5. I have had the oppor- 

 tunity through the kindness of Dr. H. G. Dyar of e.^amining a female 

 from Tana River, East Africa, north of Mombasa, collected by the 

 Chandler Expedition for the U. S. National Museum. 



Geographical Distribution. — Ethiopian realm. Eastern Africa, 

 Mombasa and Tana River, north of Mombasa in British East Africa. 



This genus by its venation closely approaches the African species 

 referred to Heniocha {H. terpsichore), but differs from any of that 



