LYCAENINAE: THE GENUS INCISALIA. 825 



series of lateral orsupralatoral leiiticlcs of a pretty larjrc size though but little elevated, 

 two to n segiueiit, oue larger anterior ami a little higher than the other; the first tho- 

 racic segment bears a transverse anterior row of ten or twelve warts emitting long 

 curving hairs and a laterodorsal pair of similar ones, all about half as long as the 

 abdominal dorsal ones. Legs not very long, pretty slender, tapering regularly, the 

 claws moderate in Icngtli, tapering, very little curved. 



Chrysalis. Viewed from above tlie outline of the body is slender, sul)pyriforra, 

 hardly twice as long as broad, scarcely and very broatUy lioUoweil along the posterior 

 half of the thorax, the basal wing promineiues scarcely perceptible, very broadly 

 rounded in front, still more so behind. Viewed laterally, the hollowing between 

 thorax and abdomen is very slight and gradual ; the thorax is highest and equal on the 

 posterior third, the front portion curving downward in the arc of a circle whose rsidius 

 is about half as long as the body; the abdomen is highest and slightly higher than the 

 thorax on the third segment, though scarcely higher than those in front on the suc- 

 ceeding two, their curve being very broad and low ; behind, the abdomen falls in a very 

 rapid curve, the whole of the eighth and nintli segmiMits being nearly perpendicular, 

 making the posterior curve of the body much more abrupt than the anterior. Trans- 

 versely the middle of the thorax has an elevated arch, the sides obliquely compressed 

 above and scarcely hollowed, the ridge well rounded; transversely the abdomen is 

 very regularly arched, forming a nearly exact semicircle perhaps a very little com- 

 pressed; half of the tongue exposed, the Inner sides of the legs separated by it; basal 

 wing prominence consisting of an exceedingly slight, low, broad, roundish elevation. 

 Whole body covered equally with an interlacing, delicate, but very distinct network of 

 raised lines, their points of intersection not raised but frequently enlarged and form- 

 ing small round warts, similar to those wliich in the cells support the short spiculif- 

 erotis hairs ; the latter are of equal length over all the body. Hooklets short and very 

 slender, the stem nearly equal and slightly curved, the expanded portion four times as 

 broad as the stem, transversely ov,<ite, tlie apical margin a little excised and toothed in 

 the middle, the whole lobe bent suddenly' over. 



This is a purely Xortli American genus, spreading across the whole conti- 

 nent between tiie annual isotherms of GO" and 45°. It is represented 

 _on either side of the Rocky Mountains by identical and perhaps also dis- 

 tinct species ; all of the species of the eastern half of the continent occur 

 in New England, two more abundantly in the south, one in the north. 

 The group is represented in corresponding portions of the Old World by 

 the closely allied genus Callophrys. 



The buttei-flies are of medium or small size for Theclidi. TIic frino-e of 

 the hind wings projects slightly at the tip of each nervule, particularly at 

 that of the lower median nervule ; the extreme anal angle is slightly pro- 

 duced and bent downward at right angles ; the wings are uniform dark 

 brownish above, the disc of the female usually tinged more or less with a 

 ruddy color. Beneath they are nearly as dark as above, especially on the 

 basal half, which is separated from the outer by a tortuous line, occasion- 

 ally rendered conspicuous by a bordering of white scales ; a darker zigzag 

 band, more or less distinct, crosses the outer half of the wing and between 

 the two there is often a hoarv field ; the margin of the winff is filled with 

 cloudy markings. 



The butterflies are among the earliest, appearing in our latitude late in 

 April or early in May, flying usually for little more than a month ; the 



