1814 BUTTERFLIES BEYOND NEW ENGLAND. 



and a veiitrostigmatal ante-ceutral series. Besides tliese tliere is amiuiature series of 

 tlic same general nature, but so small as to be easily overlooked, which is supralateral, 

 jnst in front of the incisures. 



Mature caterpillar. Head small, smooth, subquadrate, the face strongly flattened, 

 the front outer angle of each hemisphere produced, papilliform, bearing a very long and 

 slender, feebly and delicately thorny spine, like those of the body. Body cylindrical, 

 moniliforni, nearly equal, but tapering iu front so that the first thoracic segment is 

 much smaller and not larger than the head, supporting three series of long and very 

 slender, acnliform spines seated on low, smooth papillae which melt into their base, the 

 spines distantly, briefly and very delicately spinulose ; they are arranged as follows: 

 a supralateral series, one to a segment on all the segments, that on the first thoracic 

 segment reduced to a mere conical papilla and bristle ; a suprastigraatal series and an 

 infrastigmatal on all the abdominal segments, all a little in advance of the middle, be- 

 sides on the hind thoracic segment a single stigmatal spine at the anterior edge. 



Chrysalis. Of an odd shape, as if formed of two very different subequal masses, 

 one formed of the straight, tolerably regular, conical abdomen; the other of the 

 straight, but very irregular remainder of the body, obliquely attached to the base of 

 the abdomen; the ocellar pi'omineuces are rounded, obliquely compressed lobes, with 

 denticulate margin and of no vei-y great size ; the basal wing tuljercles form an anterior, 

 conical, papilliform prominence, and a rounded and pinched lateral ridge; the mesono- 

 tum high, regularly and considerably arched, the metanotum and base of abdomen as 

 considerably hollowed ; the extremity of the wings protuberant, strongly rounded. 

 There is on the abdomen a supralateral sei'ies of conical tubercles, particularly on the 

 third segment, where they are largest and double, and on the fifth, sixth and seventh 

 segments, where they decrease regularly in size; there are smaller, blunter, supralateral 

 tubercles on the third and fourth segments, and on the front edge of the fifth to 

 seventh segments a similar small one. Cromaster stout, the apical field of booklets 

 large and quadrate. 



This is a tropical American group with very few species, one of which 

 is common enough in our southern states. The external resemblance of 

 the buttei-fly to the Argynnidi has led to its being long regai'ded as belong- 

 ing witii tiiat group, which a study of the early stages was the first to show 

 to be erroneous. The transformations of our species were figured long ago 

 by Alibot, and have within a few years been minutely described by Edwards, 

 but the earliest stages not quite accurately. The caterpillars are remark- 

 ably rapid in growth, and in Mr. Edwards's opinion there must be a large 

 number of generations annually. 



AGRAULIS VANILLAE. 



I'upilio V(millne Lino., Syst. nat, ed. x: AgraiiUs vanillae Boisd.-LeC, LSp. Am6r. 



482 (1758);— Stoir, Snppl. Cram. pap. exot, 7- sept., 143-145, pi. 42, figs. 1-4 (1833);— Edw., 



8, pi. l.figs. 7a, b (1791);— Sepp, Pap. Sur., Can. eut., xii:122-126 (1880);— French, Butt, 



ii :17-18, pi. 55 (1848). east. U. S., 14S-150 (1886). 



Dryas phalerata vanillae Hiibn., Samml. PaiJi'/ioj^assi/Jorae Fabr., Ent. syst., iii:60 



exot. schmett., i (1S06-1S1(J). (1793) ;— Smith- Abb.. Lep. ins. Geo., i : 23-24, 



Dione vanillae Hubu., Verz. bek. schmett., pi. 12 (1797). 

 31 (1816). 



Imago. Head covered above with bright orange red hairs, enlivened by a few 

 white ones, especially in a spot at the outer base of the antennae, and by a pair on 

 either side behind the upper margin of the eye, and by a coll.ar of white around the 

 lower half of the eye. Palpi pure white without, orange red within; the outer half 



