COLIAS II. 



Color delicate lemon-chrome ; the border usually narrow, and of slight texture, 

 scarcely wider at apex than elsewhere ; but sometimes it is wider and heavier, 

 with loose scales and points on the inner side, and advanced on costal margin 

 about as in the male ; in all cases it crosses the wing from margin to margin. 



Secondaries either have no border, or there are a few black scales along outer 

 angle, or small clusters on the anterior nervules ; discal spot either wanting, or 

 orange, pale to deep. Under side as in the male, slightly dusted. (Figs. 3, 4.) 



2. Form Barbara. 



Male. — Color of form Harfordii, varying like that, a little black at base ; 

 the under side much dusted ; the sub-marginal markings varying from mere 

 points to conspicuous spots, a small patch at outer angle ; the discal spot 

 often large, usually in a broad ring, or doable ring, and sometimes duplex. 

 (Figs. 5, 6.) 



Female. — Color clear, pale, yellow (originally described as canary-yellow), 

 the border slight, very narrow, and extending across the wing, but little wider 

 at apex than elsewhere. Under side thickly dusted, the sub-marginal spots 

 variable ; the patch and discal spot as in male. (Figs. 7, 8, 9.) 



These types run through both sexes ; that is, the Harfordii male, as originally 

 described, is matched with a female as immaculate as itself, and the Barbara fe- 

 male, as described, is matched with a male as much dusted and spotted as itself ; 

 and between the two extremes are intergrades. (Figs. 1 and 5 show the ex- 

 tremes of color in the males.) 



Egg. — Fusiform, thick in middle, tapering to a small rounded summit ; the 

 base flat ; ribbed longitudinally, the number of ribs being about twenty, four or 

 five of which end at three quarters and more the distance from base to summit ; 

 they are low, narrow, and the spaces between are flat, and crossed by many fine 

 horizontal striae; the micropyle (Fig. a^) is in centre of a rosette of five cells, 

 hexagons, outside of which is a ring of cells, of same shape but irregular ; all 

 these roundly excavated ; color yellow-green, in a short time changing to crimson, 

 as do all Colias eggs. (Fig. a.) Duration of this stage about four days. 



Young Larva. — Length .12 inch; cylindrical, a little thickest on 2 and 3; 

 each segment several times creased, and on the cross-ridges so formed are many 

 black points, each giving a short, black hair ; scattered among these are long, 



