1504 THE BUTTERFLIES OF NEW ENGLAND. 



slightly elevated, not very delicate; central circle .0120 mm. in diameter; cells suc- 

 ceeding it .021 miu. by .017 mm., outermost longest cells about .03 in diameter. 

 Height, .74 mm. ; greatest breadth, .79 mm. ; breadth at a distance of .13 mm. from 

 the top, .or, mm. ; height, .74 mm. 



Caterpillar. First stage. Head orbicular, slightly flattened above, as broad as 

 middle of the body : uniform p.ile yellow with a brownish tinge, with white hairs; 

 ocelli black; labrum, l.ibinm and antennae pale; mandibles of the color of the head at 

 base, the edge dai'k castaneons. Body pale greenish yellow, with a brownish tinge, 

 fainter than that of the head ; skin distinctly shagreened ; dorsal shield of the first 

 thoracic segment scarcely darker than the body, not so dark as the head. Legs and 

 prolegs concolorous with the body, the claws of the former pale castaneons; bristles 

 pellucid, of exceptional length, so that the abruptly expanded apex on those adjoining 

 nearly touch; those of the suprastigmatal series are .025 mm. long and of similar 

 breadth at the top; those of the infrastigmatal series are .75 mm. long and only 

 slightly expanded at tip, to a width of about .01 mm. Length of body, 3 ram. ; 

 breadth, .4 mm. 



Last stay (77 : 12, 18). Head dark brown, paler yellowish brown above. Body 

 rather pale green, with a dark green dorsal stripe, bordered with pale greenish yellow, 

 a rather narrow stigmatal band of pale greenish yellow, and between the two and 

 below the latter, rather pale green flecked with darker green dots ; last segment pale 

 yellowish green. Prolegs of color of body ; legs greenish, tipped with brownish yel- 

 low. From Abbot's drawings in the Boisduval lilirary. 



The figure in the British Museum drawings by Abbot gives an orange-yellow spot on 

 either side of the base of tlie frontal triangle, and the body pale yellowish brown, with 

 a darker dorsal band and a pale, rather indistinct lateral band ; segments dotted ob- 

 scurely with fuscous on their posterior half, but not on the bands just mentioned. 

 Length, 31 mm. ; height, 5.75 mm. 



Specimens which I had upon oak were presumed to be T. juvenalis, and no descrip- 

 tion of them taken. 



Chrysalis (85:38). Pea green, paler on abdomen, the terminal third of the seg- 

 ments of which are again a little darker. Thoracic spiracle black ; cremaster in- 

 clining to yellowish brown. From the Boisduval series of Abbot's drawings. 



The very poor drawing in the British Museum series gives it as reddish brown, 

 darker on the thorax and wings than on the abdomen. Length, 22.5 mm. ; height, 

 5.25 mm. 



The chrysalis skin, after escape of the butterfly, difl'ers strikingly bj' its darker color 

 from that of T. lucilius. It is almost completely luteo-castaneous, the wiiig cases and 

 all the appendages blackish fuliginous, as is also to a large extent the whole head and 

 thorax; these and the base of the wings as well, are vaguely blotched with oliva- 

 ceous. The sutures both of thoi-ax and abdomen are marked with salmon color, and 

 the prothoracic spiracle is velvety black. The 'whole surface is smooth and glistening, 

 feebly striate transversely, almost absolutely without hairs, these being excessively 

 short, scattered widely, situated in the larger punctae. Length, 13 mm. ; breadth, 

 4.25 mm. 



Comparisons. This species differs from icelus in its almost invariably considerably 

 larger size, in the greater distinctness and limitation of theintra-mesial band, in having 

 the upper half of the wing beyond the extra-mesial band quite as distinctly flecked 

 with lioary as the same part of the wing lietween the two mesial bands, while in icelus 

 the latter is invariably conspicuous in fresh specimens ; it also difters in the contrast 

 the ? presents to the (J , it being more grayish. 



Distribution ( 28 : 4) . This butterfly is very widely distributed ; it crosses 

 not only the Canadiau and AUcghanian faunas but also the Carolinian, though 

 its western extension is very imperfectly known. The northernmost known 

 stations are Nova Scotia "very abundant" (Jones), Quebec "common" 



