NYMPHALINAE: TIIP: GENUS EUPHYDRYAS. 087 



row on the iinier half of !i circle, moderately distant from each otlier, the hooklets 

 them-^t'lves being very slender, equal, delicate, pretty stronjjly curved. 



Chrysalis. Viewed from above the anterior curve is considerably broken in the mid- 

 dle in front by the very slight protuberance of the base of the ocellar prominences ; the 

 latter not at all pronounced but very blunt and rounded, slightly ridged posterioi'ly on 

 the outer edge of the anterior face; front of head, including the prominences, scarcely 

 concave, and not more so next the prominences. On a side view they are angulated, 

 with a small, rounded tubercle projecting downward very slightly at the angle, a little 

 swollen at the base of the inferior surface, the latter in direct continuation of that of 

 the whole anterior part of the body, the anterior face of the prominences bent at an 

 angle of I'd'j'^ Avith the parts above it. Inferior surface of body, as far as near the tip 

 of Avings and including the ocellar prominences, straight. Thorax roundly arched in 

 a longitudinal direction but not greatly elevated, regular excepting a very slight, 

 roundly angular prominence, a little in advance of the middle of the posterior half 

 of the mesothorax. Basal wing tubercle similar to that of Charidryas, but rather more 

 prominent and longer; its posterior ridge is but little I'aised, its edge much rounded, 

 constantly lowering, Avith no supernumerary tubercle. Prothorax Avithout tubercles. 

 Abdomen broadly and regularly arched longitudinally ; a latcrodorsal series of blunt, 

 conical, medium-sized tubercles on the middle of themeso- and metathorax and the first 

 to ninth abdominal segments, those of the first, eighth and ninth abdominal segments 

 smaller and more rounded than the others. The abdomen is also furnished Avith a dorsal 

 series of similar tubercles on the anterior border of the first to eighth segments, those 

 of the first to third, and esi^ecially the first, smaller than the others; there is also a 

 much smaller, posterior, I'ounded Avart on the eighth segment ; a suprastigmatal series of 

 slight, broad, rounded elevations, a little in advance of the middle of the second to 

 eighth segments, those of the third to fourth segments elevated to conical tubercles 

 similar to, and nearly the size of, those of the laterodorsal roAv ; an infrastigmatal series 

 of similar Ioav elevations on the middle of the fourth to eighth segments, those of the 

 fourth slightly higher; and a lateroventral series of very slight, transverse elevations 

 on the fourth to seventh segments, one on the fourth and seventh, tAvo each on the 

 fifth and sixtli, all placed at or near the middle of the segments. Inferior base of 

 cremaster bounded laterally by very broad walls, distinct jjosteriorly, scarcely raised 

 anteriorly, sinuous, converging a little anteriorly, each terminating in a rather small, 

 rounded tubercle, scarcely longer than broad, directed forAvard and downAvard. 

 Cremaster proper viewed from aboA'e not very large, as long as broad, tapering 

 strongly and regularly except in bearing next the base a very prominent, slightly 

 tapering, outwardly and posteriorly directed, rounded tubercle nearly tAvice as long as 

 broad; rather squarely docked at apex, channelled rather deeply and narroAvly doAvu 

 the middle; viewed from the side it is strongly curA'ed, stout, enlarging regularly, 

 the apical field of anal hooklets longitudinally oval. Hooklets Avith the stem pretty 

 long, very slender, and nearly or quite straight, the crook greatly enlarged, espec- 

 ially in a vertical direction, and very strongly curved over, the tip pointed. 



This genus appears to have but a single representative, which is in- 

 digenous to eastern North America ; species of very closely allied genera 

 are found in the Avestern half of North America and in the northern parts 

 of the Old World, but are wantino- in the reg-ion where this genus oc- 

 curs. 



The butterflies are of medium size Avith rather elono;ated Avings, black- 

 ish on both surfaces, Avith a rather broad reddish margin, cut by black 

 nervules and preceded by pale yelloAv lunules ; betAveen these and the 

 middle of the Aving is a double or treble, parallel, curving or sinuous series 

 of small, pale yelloAv spots and the base of the Aving is marked, especially 



