NEOPHASIA; EUCHEIRA; TATOCHILA. By J. Robek. 55 



1. Genus: Xeophasia Sehr. 



This genus is nearly allied to the Palaearctic Aporia Hhn. It differs principally in the direction of 

 the precostal, which is not straight, but ciurved slightly inwards, the longer and slenderer palpi and the 

 more distinctly clubbed antennae. The costal of the forewing onlj^ extends a little beyond the middle of 

 the costal margin, the subcostal is four-branched with two branches before the closing nervure of the 

 median cell, the third and faurth branches form a short fork and the third runs to the apex. The upper 

 radial is coincident with the subcostal almost to one-half, hence the upper discocellular is wanting. The 

 middle and lower discocellulars are about equal in length, the former is curved inwards, the latter is straight 

 and closes the middle cell, joining the third median*) in an acute angle at its bend. The middle cell of 

 the fore- as well as of the hindwing is rather narrow. The upper and middle discocellulars of the hindwing 

 ai-e about equal in length, and form together an almost straight line, the lower discocellular is longer, weaker, 

 and meets the third median vein at the bend. Two purely North American species belong to this genus. 



N. menapia FJdr. (= tau Scudder, ninonia B) (18a) is white above and beneath, thinly scaled, menapia. ~^7 

 therefore somewhat transparent, the forewing has black markings at the apex and the anterior part of the 

 distal raai'gin, with white subapical spots, the costal margin is broadly black to the apex of the cell, also 

 the discocellulars, the rest of the costal margin narrowly black. Hindwing almost without markings. On 

 the similarly marked under surface of the forewing the black markings are paler, the veins of the dirty- 

 white hindwing are black, there is also a submarginal band of the same colour. The ? has on the upperside 

 paler black markings, some submarginal markings, and sometimes on the underside small red spots at the 

 distal margin of the hindwing. — Egg flask-shaped, fluted at the sides. Full-grown larva about 25 mm. 

 (1 inch) long, head cjlindiical, abdomen terminating in two short tails, dark green with a broad white band 

 at each side and a narrow white band on the back , abdominal legs black , thoracic legs greenish yelloAv. 

 Pupa dark gi-een , striped with white , similar to the Co/«as-pupae , but somewhat more slender. Larva on 

 various conifers, sometimes so abimdant as to cause considerable damage. In the north-west of the United States. 



N. terlooii Behr (= epyaxa Poling, Ai'chonias lyceas Skinner) (18a) is very similar in pattern to terlooii. « 

 menapia, but the black markings are more extended; the cf has white, the ? red-brown ground-colour. The 

 larva hves in a common web on Arbutus. Cahfornia. — princetonia Poling, from Illinois, is probably jO«nce^o«w. '^ 

 only a form of terlooii. In the <f both sides of the hindwing are sprinkled with pale red at the margin, 

 the ? is deeper red beneath than above, and the veins are more broadly edged with black than in the ? 

 of menapia. — From lack of material I have not been able to decide with cortainty whether this species 

 belongs to this genus, but the agreement of the markings with menapia suggests a Neophasia. 



2. Genus: Hucheira Westtv. 



Although this genus differs essentially from the preceding in the neuration, yet it is closely allied 

 to it in the life-historj- of the larva. The larvae live gregariously in a web , go out at night in a proces- 

 sion to feed, and pupate in the web with the head downwards. The subcostal of the forewing is entirely 

 free, hence the cell is closed by ^hree discocellulars. The cell i's very narrow and long. Only one species. ^ 



E. socialis Westtv. (18a), from Mexico, is a smoky grey butterfly with a white central macular band; socialis. ly ^ 

 the cf has in addition more distinct white submarginal spots on the upper and under surface of both wings. 



3. Genus: Tatochila Btlr. 



This genus is almost confined to the southern part of South America and is closely allied to the 

 foUo-ning genus, Pieris; it differs from this in the shorter middle discocellular and the almost straight lower 

 discocellular of the forewing, but principally in the uniform character of the markings. The species of this 

 genus appear to occur only in one generation. The butterflies fly from November to April. 



T. volxemi Capr. {■= achamantis Berg) (18 a). Upper and under surface of the d" white with a volxemi. ^T 

 large black spot on the discocellulars of the forewing and slight blackish markings at the apex of the fore- 

 wing above and beneath, cf similar to the ? of theodice BL, but the marginal markings somewhat narrower, 

 the submarginal markings on the contrary somewhat broader, also a black stripe in the cell of the hind- 

 Aving. — Argentina. 



*) What the author calls the ,,third median" is really the third radial, there being three radial and two median branches 

 in the butterfly-wing. — Transl. 



