1348 THE BUTTERFLIES OF NEW ENGLAND. 



as the thoracic ones, and placed anteriorly on the first thoracic segment ; and finally 

 a laterostiginatal series of minute, spiny tnbercles, placed centrally on the thoracic 

 and first to ninth abdominal segments, becoming stigraatalon the first thoracic segment. 

 Osmaterinm having the main stem rather short, appressed and broad, about half 

 as long as the forks, the latter diverging at about a right angle, curving a little back- 

 ward and tapering to the tip. Spiracles very small, scarcely twice as long as broad. 

 Legs stout and large at base, beyond rather slender, a little appressed, the claws mod- 

 erately large, considerably curved, tapering, a little heeled at the base. Prolegs 

 stout, short, scarcely tapering, the ventral ones armed at tip with about fifty liook- 

 lets arranged in a triple row, straight for most of its course, curved at its ends; the 

 hooklets have an exceedingly long, equal base imbedded in the integument, the exposed 

 end being short and stout, thickened and then tapering, strongly curved and bluntly 

 pointed. 



Chrysalis. Body moderately uniform, subcylindrical, tapering posteriorly ; angular 

 prominences mostly confined to the front, throughout somewhat rugulose; the abdo- 

 men occupies a little less than two-thirds of the body. Viewed from above, the body 

 is slightly wider at the third abdominal segment than at the basal wing tubercles, the 

 line between them slightly bent inward at tlie girt; behind, the body tapers very regu- 

 larly ; in front it tapers very rapidly with a slight concavity as far as the anterior 

 extremity of the mesothorax and then continues nearly parallel to the base of the 

 ocellar prominences. Viewed laterally, the prothorax is a little tumid above, the 

 general slope being about equally upward and backward, and inclined at an angle of 

 about 65° with the front of the lower surface; the front of the mesothorax in advance 

 of the tubercle is nearly perpendicular, behind it nearly horizontal, but sloping slightly 

 downward and a little convex ; the first four segments of the abdomen are straight 

 and horizontal, the succeeding ones curved regularly and roundly downward. Under 

 surface in front of the base of the wings nearly straight, beyond, as far as the tip of 

 the wings, considerably arched, but not quite regularly, being bent somewhat beyond 

 the middle ; the abdominal segments beyond are slightly concave, beneath tapering 

 regularly as above; transversely the abdomen is strongly arched above, more strongly 

 posteriorly than anteriorly, nearly fiat beneatli. Surface of the head fiattened above, 

 with a pair of minute rounded warts in the middle at the extreme base of the 

 antennae; beneath flattened, a little prominent in the middle. Ocellar prominences 

 pretty large, rugulose, especially the edges, trigonate-pyramidal, the edges carinate, 

 divaricate but slightly, being nearly parallel, the front carina extending in a straight 

 course to the junction of the tongue and antennae, and a little and rather suddenly 

 prominent just below the middle; the inner carina irregular, scarcely receding, and 

 more or less minutely notched on its apical half, suddenly receding on its basal 

 half, with a minute tubercle at the base and the front of the head between narrow and 

 somewhat broadly concave ; the superior carina is pretty strongly rounded on the 

 head and extends more or less distinctly to the hindmost portion of the prothorax. 

 The prothorax is channeled along the middle line, the channel enlarging posteriorly, 

 the sides pretty deeply hollowed posteriorly. Mesothorax quite tumid throughout, but 

 particularly in front, furnished close to the front with a rather large, abrupt, sub- 

 trigonate, rugulose tubercle, directed forward and a little upward, scarcely tapering, 

 rather broader than high, the anterior edge coarse, the posterior pair extending not 

 very distinctly over the tumid mesothorax, diverging somewliat, nearly to the pos- 

 terior border. The basal wing tubercles are rather broadly and not greatly prominent, 

 surmounted by a rugulose, transverse, curving ridge, giving it a subtrigonate appear- 

 ance; the ridge upon the side of the body is not very prominent, well rounded, 

 following the upper edge of the wing as far as the third abdominal segment, beyond 

 following the stigmatal line to the base of tlie fifth segment, where it terminates, 

 being a little prominent on tlie posterior portion of the second and third segments ; 

 there is an indistinct laterodorsal ridge over the whole of the abdomen, made con- 

 spicuous by small, somewhat compressed, papillose tubercles, highest posteriorly, 

 situated on the metathorax and the fourth to seventh abdominal segments, the first 



