620 THE BUTTERFLIES OF NEAV ENGLAND. 



ing common webs,* in which some kinds hibernate ; for, so tar as known, 

 all the species of this tribe, whether in the New World or the Old, pass 

 the winter as half grown caterpillars. 



The eggs approach those of the Vanessidi in form, but are very slightly 

 ribbed, and that only on their upper half. The caterpillars feed on low 

 plants, mostly Scrophulariaceae and Compositae ; they are generally dark 

 colored and resemble the caterpillars of the Argynnidi, but instead of the 

 long, often unequal, conical prominences, they are provided with rather 

 low, equal, blunt, Heshy tubercles beset with needles ; the head is never 

 crowned with spines. The chrysalids are rounded, but covered with low, 

 conical tubercles in longitudinal series, and have, occasionally, other slight 

 angulations. 



Table of the genera of dielitaeidt, based on the egg. 



Egg with tliiinble-like depressions ou the sides. 



Egg scarcely higher than broad ; thimble-like depressions covering the lower hall of the 



go-o- Phyciodes. 



Egg half as high again as broad ; thimble-like depressions confined to the middle third of 



Iheegg Charidryas. 



Egg with snrface smooth excepting for the vertical ribs. 



Egg about one-fifth higher than In-oad Cinclidia. 



Egg about one-third higher than l)road Euphydryas. 



Table of the genera, based on the caterpillar at birth. 



Hairs of body much longer than width of body Phyciodes. 



Plairs of l)ody shorter than width of body Euphydryas. 



Charidryas and Cinclidia not examined. 



Table of the genera, based on the mature caterpillar. 



Body cylimlrical throughout, or scarcely tapering forward on the thoracic segments, marked 

 with longitudinal stripes of a pale and dull color in contrast with a darker ground ; constructs 

 no web at any period of life. 



Tubercles of body stout, conical, less than twice as high as In-oad Phyciodes. 



Tubercles of body slender, tapering but little, fully three times as high as l)road 



Charidryas. 

 Body distinctly tapering forward on the thoracic segments, marked alternately and transversely 

 with l)lack and bright orange colors on most of the al)domina] segments ; lives in a web in 

 early life. 

 Body sprinkled between the tubercles with very short and exceedingly delicate, scattered 

 hairs, with an occasional long one. No infrastigmatal tubercle on the third thoracic seg- 

 ment Cinclidia. 



Body sprinkled between the tul)ercles with pi-etty long, spinous, tapering hairs. An in- 

 frastigmatal tubercle on all the thoracic segments Euphydryas. 



* In one Pacific coast species, according to best developed in the Old World and on the 



Mr. Henry Edwards, each individual makes a Pacific slope of our own country, in distinc- 



separateweb of its own. The web construct- tion from eastern America and the tropics, 



ing habit appears to be confined to and almost To it of our New England genera belong Cin- 



universal in that section of the tribe which is clidia and Euphydryas. 



