724 THE BUTTERFLIES OF NEW ENGLAND. 



is the case also with all he has seen fi'om the West Indies. Fiji and Australia; which 

 rendei's it the nioi'c probable that all these places were colonized from North and not 

 from South America. It may be added that in the South American type, the spots next 

 the apex of the cell of the fore win.;>s are sometimes absent. See the notes on the pre- 

 cediiiii'page for some other distinctive features of more importance. 



Accessory sexual peculiarities. The pouch on the hind wings, alluded to under 

 the genus, is one of the notable sexual characteristics of the male. It is long oval in 

 form, deflecting the vein in the immediate proximity (38: 2; 44: 2) and a cross- 

 section (44 : 3) shows that it is only about double the size of the vein. It opens away 

 from the nervule. At its mouth the scales are alternately broad, rounded or quadrate- 

 oval (46: 5, 0) and fan-shaped, trilobed at tip (46: 7), the middle lobe broader and 

 more rounded than the others, as pointed out by Fritz Miiller. On the nervule near 

 by are many slender, round-tipped scales (46 : 8) ; while the floor of the pouch itself 

 is occupied by somewhat symmetrically and pretty evenly distributed blackish scales, 

 paler at the base, whicli appear to be the androconia proper and are of two types : one 

 laminate (46 : 9) , long oval, generally roundly and angularly subtruncate at tip ; the other 

 rod-like (46 : 10), more or less, but very faintly and gradually, incrassated apically and 

 expanded slightly at the base, where, according to Miiller, they are seated in the centre 

 of a chitinous annulus, wanting at the base of the other scales. Besides this there is 

 the extensile pencil of clubbed hairs at the tip of the abdomen, described above. 



Egg (64 : 1). Very pale amber green, becoming grayish before hatching. Vertical 

 ribs twenty-two in number about .1 mm. apart in the middle, the intervals smooth and 

 glistening, broken by bands .012 mm. in width, giving the egg somewhat the appear- 

 ance of being overlaid with a tliick layer, perforated by regular meshes which are the 

 cells between them ; in the largest part of the egg these cells are about .08 mm. in 

 bi-eadth and .025 ram. in height, being quadrangular with rounded sides. Summit of 

 the egg about .1 mm. in diameter (67: 4), not at all sunken but gently convex, the 

 outside cells about .01 mm. in length, and the micropyle proper .05 mm. in diameter. 

 Height of egg usually about 1.2 mm. and the breadth .85 mm. 



Caterpillar. First stage (70: 3). Head (78: 1) piceous, with scattered, delicate 

 and short black hairs ; labrum and labium very pale green ; other mouth parts fuscous ; 

 antennae pale. Body pale green, narrowly banded on tlie anterior end of each abdomi- 

 nal segment with pale olive green slightly inf uscated. Last segment black posteriorly. 

 Skin shagreened by a fine punctuation. Hairs very slender, scarcely tapering, bluntly 

 tipped, not clubbed, about half as long as the segments, black. Tubercles on second 

 thoracic and eighth abdominal segments brownish fuscous, scarcely appressedat base; 

 laterodorsal blister of first thoracic segment piceous. Legs and prologs beyond basal 

 joint black, the latter only outwardly, and ringed with green apically. Spiracles 

 showing a black ring on a pale ground. Length, 3 mm., breadth. .45 mm. The colors 

 grow darker witli age. 



Second stage. Head (78: 2) black, the centre of the triangle white; parallel to the 

 hinder border are two broad, equidistant, whitish bands broken in the middle above; 

 hairs black. Body lemon yellow, each segment with a central, transverse, white band, 

 containing a central, transverse, pui'plish black stripe, running with equal width around 

 the body, on the pedigerous segments passing down the front of theprolegs; the 

 last abdominal segment wants the white band but not the black and is tipped with 

 black; the first thoracic segment is almost entirely white, but has a transverse dusky 

 stripe, in which, on either side, is a large, laterodorsal, transversely oval, shining 

 black spot. The fieshy threads are short, thick, bluntly pointed, black, the front ones 

 a little appressed; the black hairs are arranged in transverse rows, one in the middle 

 of each bright stripe, and they are not infrequent. Spii'aclcs black, annulate with 

 luteous; legs black; prolegs whitish, black tipped. Length, 7.25 mm.; breadth of 

 body, 2 mm. ; length of anterior filaments, .G mm. ; of posterior pair, .25 mm. 



One of these catex'pillars, preserved in alcohol at its second stage, showed on exam- 

 ination a couple of little threads upon one side; on attempting to raise thera, they 

 came off with the instrument, leaving, however, no mark of attachment on the body, 



