1594 THE BUTTERFLIES OF NEW ENGLAND. 



long as broad ; the other tibiae furnished at tip with a pair of very long and 

 slender spurs, the hind tibiae also with an exactly similar pair in the middle of 

 the outer two-thirds. Tarsal joints 1, 2, 3, 4, 5, excepting in the fore legs, where the 

 apical joint is distinctly longer than the penultimate. Fore tarsi longer than tlie 

 middle tibiae, four-flfths the length of the middle and hind tarsi, all with a triple row 

 of not very long, delicate spines, the apical ones of each joint sliglitly longer than 

 the others; basal joint as long as the rest together; second joint half as long as 

 the first. Claws very small .and delicate, tapering very regularly to a tine point, 

 pretty strongly and regularly arcuate. Pad moderate, tumid; paronychia bilobed, 

 the upper lobe lateral, laminate, straight, regular, tapering to a blunt point, reacli- 

 ing to the tip of tlie claw, nearly twice as long as broad ; the inferior lobe originating 

 as low as possible, slender, equal, threadlilce, fringed beneath, lialf as long as the 

 claw, and straight. 



Upper organ of male abdominal appendages of medium size, reacliing as far as 

 the clasps, arched pretty strongly at base, but beyond straight, depressed, rather 

 narrow, hook double, consisting of two very slender, equal, not very long, parallel, 

 widely separated fingers ; lateral arras consisting of a broad, depressed, equal plate, 

 stretching a little beyond the hook and close to it. Clasps very broad, basal half 

 equal, but little convex, beyond curving upwards to a fine but not greatly produced 

 point ; middle of upper edge with a rounded lobe. 



This genus consists of but a single species, wiiose distribution in east- 

 ern North Americii is given below. 



The perfect insect is of small size, with dark mulberry colored wings, 

 the upper surface of the female and the under surface of the fore wings of 

 both sexes with an interrupted extra-mesial band of pale spots, few in 

 number, the under surface of the hind wings with a very large, central, 

 yellow spot, consisting of two bands crossing each other — one arcuate and 

 transverse, the- other straight and longitudinal. 



Nothing is known of the history of this butterfly excepting that it is 

 double brooded. 



EXCURSUS LXIIL— BUTTERFLIES AS BOTANISTS. 



And evermore with most varietie, 



And change of sweetnesse, (for all change is sweete), 



He casts his glutton sense to satistie. 



Now sucking of the sap of herbs most meet, 



Or of the deaw, which yet on tbein does lie, 



Now in the same bathing his tender feete: 



And then he pearcbethon some Inaunch there by, 



To weather him, and his moyst wings to dry. 



Spencer. — Mu iopotmos. 



Two facts referred to in a recent excursus, as brought out from a study 

 of the food plants of the caterpillars of butterflies, are more striking when 

 brought into contrast : the narrow choice of very many species which feed 

 upon a single species or genus of plants, and the very large number of 

 families of plants which are brought under contribution to feed the entire 

 body of our caterpillars. The fact that considerably more than half of the 

 families of plants are sought by only a single family of butterflies and in- 

 deed usually by but a single species of butterfly is only what one who 



