1420 



THE BUTTERFLIES OF NEW ENGLAND. 



delicately uncinate; clasps much broader in the middle than at the base, by the great 

 extension of the upper lobe, the clasp broadening to form it as far as the middle, then 

 remaining of uniform breadth for a short distance, and then narrowing at once to con- 

 siderably less than half its width, by the excision of the upper edge; the lobe thus 

 formed is well rounded at the upper posterior angle, and rugose ; beyond the lobe the 

 narrowed clasp is regularly and pretty strongly arcuate upward, of nearly equal width, 

 excepting a basal narrowing and a slight tapering throughout, is nearly four times as 

 long as broad, and terminates, when directed upward, by a mass of minute prickles 

 outwardly, and a long and slender, tapering, pointed spine, curving forward so as to 

 touch the posterior angle of the upper lobe, and inclined at the same time a little 

 inward. 



Measurements in millimetres. 

 Length of tongue, 15 mm. 



.Smallest. Average. Largest 



Length of fore wings 20.5 



antennae 11.5 



hind tibiae and tarsi 9.5 



fore tibiae and tarsi I 5.75 



21. 



11.8 

 9.5 

 5.75 



22.5 



12.25 



10.5 



6.8 



FEMALES. 



Smallest. Average- Largest 



21.5 

 11.5 



11.6 



8.8 

 5.5 



23. 



12.25 

 9.6 

 5.85 



Described from 9 $ , i ? . 



Accessory sezual peculiaritieB. The costal fold of the fore wing of the male 

 encloses several kinds of scales : first, a chain-bristle, flagellate at tip (47:2c) com- 

 posed or from three to six links, each about .04 mm. in length; second, of rod-like, 

 granular scales, equal except for the slightest possible spatulate enlargement at the 

 tip, about half as long again as one of the links of the chain-bristle, and of the same 

 relative slenderness ; third, of large, thin scales, apparently of a granular structure, 

 but really with an excessively fine striation, having various shapes, but generally long, 

 subequal and tapering, often laterally arcuate (47:2a) and generally pointed; and 

 fourth, the very broad, broadly truncate, almost semicircular, striate cover scales 

 (47 : 2b). Perhaps minute, peg-like androconia exist, but they were not noticed at the 

 time of examination. 



Egg (66: 15). Furnished with from thirteen to fifteen, generally fifteen, vertical 

 ribs, at the most .2 mm. apart, the spaces between them broken by raised cross lines, 

 .017 mm. apart, into quadrangular cells about ten times as broad as high; surface very 

 finely and very faintly punctuate. Micropyle rosette about . 1 mm. in diameter. Color 

 opalescent parafflne white. Height of egg, .82 mm. ; greatest breadth, 1 mm. ; breadth 

 of base, .8 mm. ; of summit, .4 mm. 



Caterpillar. First stage (73: 0). Head (80:17) subpiceous, delicately and shal- 

 lowly punctate with scarcely observable striae, some arranged in confluent, vertical 

 or subvertical rows; a few distant, curving, pellucid hairs; collar subpiceous, simi- 

 larly punctate but not striate, with similar but longer hairs connected with the head by 

 a dull reddish neck. Body green, shagreened, punctate with pale green transversely 

 oval dots, transversely arranged on the segmental folds; papillae black on a pale green 

 base, the hairs erect, long, straight, or slightly arcuate, pellucid green. Length of 

 body, 3.25 mm. ; breadth of same, .5 mm. ; of head, .65 mm. ; length of hairs, .14 mm. 



Second stage. Tlie head (80 : 18) becomes more pyramidal and the suture impressed 

 above ; subpiceous, covered with sparse hoary pile and above with a few conical granules. 

 First thoracic segment and legs piceous ; rest of body, other thoracic legs and pro- 

 legs greenish yellow with a ferruginous tinge to the posterior segments and all cov- 

 ered with white conical dots emitting brown pile ; these dots form a faint row along 

 the lateral line and there is a faint, slender, greenish, dorsal line. Under side of body 

 paler. Length, 4 mm. ; breadth of head, 1 mm. 



Tliird stage. Summit of each hemisphere of head crowned with a transverse row of 

 four or five triangular, pointed, depressed, forward directed, tooth-like spines; the 

 rest of the head has become subrugose ; otherwise as before. First thoracic segment 

 castaneous with a distinct, brief, piceous shield extending only as far as the lateral 

 line and with pallid surroundings ; rest of body yellowish green, paler posteriorly, the 



