12 THE CANADIAN ENTOMOLOGIST. 



extremities even with the claspers ; segment 2 is broad, covered dorsally 

 by a chitinous patch which is surrounded mostly by a fleshy ridge ; on its 

 anterior side is a yellow or red patch ; surface of body smooth, but with 

 one or two vertical creases to each segment and some depressions near 

 the summit ; under side brown ; feet black, legs brown ; head sub-cordate, 

 flattened in front, the depression at top slight, the vertices not being much 

 elevated ; color dull black, much covered with short black hairs. At 8 

 days from 4th moult the larva suspended, and in two days thereafter 

 pupated (in August). 



CHRYSALIS — Length i.i inch ; the abdomen anteriorly very broad, 

 measuring .34 inch ; the thoracic segments narrow ; bent in a double 

 curve, the head and thorax being thrown back, the abdomen arched and 

 turned down at end ; head case much produced, narrow, widening at top, 

 compressed transversely and bevelled roundly and equally to a sharp 

 transverse ridge, the top of which is a little incurved ; the sides at top 

 triangular and at the edges ridged ; at base of head case on either side is 

 a small pyramidal projection ; mesonotum high, rounded, and having on 

 the summit an elevated, three-cornered process, rounded bluntly at top, 

 the sides excavated so as to form three sharp ridges, two across and one, 

 on upper side, in medio-dorsal line ; the wing cases flaring, especially on 

 lower half, the middle being depressed ; on the abdomen are two sub- 

 dorsal ridges, on each of three segments produced to a high thin circular 

 appendage ; on either side of abdomen a low ridge ; color variable, being 

 either wood brown, finely veined or reticulated with darker, the ventral side 

 of uniform hue ; tlie top of head case, mesonotum and dorsal side of 

 abdomen being a little yellowish, all the ridges being darker ; at base of 

 head case on dorsal side, and along the edges of the wing cases, is a 

 sprinkling of small deep yellow spots and points. Or the general color 

 is green, which prevails over the whole ventral side, the ridges everywhere 

 being of a darker green ; the mesonotum yellow-green, and all below to 

 end of abdomen light yellow ; a yellow patch at base of head case, which 

 sometimes includes a crimson spot ; aad sometimes, on either side of 

 mesonotum, is a small round crimson spot. Duration of this stage 15 

 days. 



Philenor is a very common butterfly in this region, to be seen from 

 early spring to frost, m successive broods, and yet I rarely find its cater- 

 pillar. Aristolochia, the vine upon which it feeds, is not rare in our 

 forests, but is confined to them. Undoubtedly the caterpillar feeds on 



