ILLUSTRATIONS OF UNFIGURED LEPIDOPTERA. 9 



Lasaia rosamonda A. G. Weeks, Jr. 1 



(Plate V.) 



Habitat: Colombia, Bogota District. Expanse: 1.45 inches. 



Front and summit of head covered with brownish gray hairs. Antennae 

 black with white annulations at base of joints, but scarcely perceptible. Club 

 black. Thorax covered with brownish gray hairs above, beneath pinkish 

 white, bordering to gray, and matching the wing coloring. Legs the same. 

 Abdomen practically the same coloring as the thorax. 



The ground color of upper side of wings is a bluish slate with some lustre, 

 the marking being confined to a series of transverse black lines. 



Costa of primary blue slate with black dusting near base. Hind margin 

 somewhat dentated, interspaces being white with a thread-like black border. 

 One sixteenth of an inch within this a black wavy line following contour of 

 margin, suffusing the space at very tip, extending downward to submedian 

 vein. An equal distance within this another wavy line exactly similar, and 

 again a third line. These three lines with the interspaces of the ground color 

 cover the outer third of the wing and form what, at a hasty glance, might be 

 termed a broad wing border. Within these, at a somewhat greater distance, 

 is a black line beginning at the subcostal vein and extending downward to 

 the second median veinlet. The space from this line to the base of the wing 

 is broken by two more dark lines, a little less heavy than the others, which 

 extend from the subcostal vein to the submedian vein. 



The markings of the secondaries are identical, except that the outer line is 

 broken into elongated spots and the second line is less prominent than on 

 the primaries. The costa and upper marginal space are brownish. The inner 

 margin is covered with dark grayish hairs, which are quite prominent on close 

 investigation. 



The under side presents a different coloring, the space on both wings from 

 hind margin to the third line being of a pinkish white with a mother-of-pearl 

 lustre. The lines, instead of being black, are a dark mouse brown and show 

 some suffusion. Within the third line the space to the base is heavily suffused 

 with the color of the line; thus the wings are divided into two sections, the 

 inner, of dark brown mouse color, and the outer, or border portion, of pinkish 

 white as above noted. On the fore wings the first and second lines are less 

 marked on the lower portion of the wing, while near the tip they are suffused 

 encroaching on the pinkish white ground color to such an extent that it takes 

 the appearance of a transverse bar cutting across the tip. 



On the under side of the secondaries the first two lines are merely a series 

 of spots in the interspaces, while the third line, bordering the inner suffused 

 half of the wing, is strongly marked. 



J Pr. New England Zool. Club, Vol. II, pp. 45-46, December 15, 1900. 



