236 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xii, 



Subapical ocellus larger than in 0. promethea, longer, and widely bordered externally 

 with madder-red. This is followed by a series of about four blue semicircles or fine lunules, 

 one in each of the four hinder intervenular cells. (These blue lunules are not present in the 

 two other species.) 



Hind wings colored and marked as in the anterior pair, but of the two submarginal brown 

 lines or bands, the inner is wide and broken into two more or less connected spots in each cell, 

 the outer narrower line being continuous. Underside of the wings just as above, the ocellus 

 and the blue lunules are distinct, and all the markings and bands are the same. 



Venation : Differs from the two other species in the origin of veins II 3 [III 3 ] and the four 

 succeeding on fore wings being (if connected by an imaginary line) in nearly a straight, only 

 slightly curved line, this line being in the two other species much curved, especially in 

 C. angulifera. For these and other differences in both pairs of wings see the figures. 



[A note in pencil is as follows:] Is vein II 2 wanting? This and the presence of four 

 blue lunules are primitive characters, and the other two species have no white thoracic band. 

 Expanse of fore wings, 3 112 mm.; length of fore wing, 57 mm.; length of body, 3 

 28 mm. 



This species differs decidedly from o* promethea in the less falcate wings, in the distinct 

 broad, unscalloped, slightly sinuous even white band, in the presence of the white trigonate 

 discal spots, in the much less sinuous submarginal line, while the hind wings are not so much 

 prolonged, being in shape more hke the ? of the other two species. 



The specimen described (from United States National Museum) differs from Tepper's 

 figure (photograph) of the ? in the common extradiscal band being so even, not waved or 

 undulated; in the submarginal line being less sinuous, in the discal white spots being much more 

 regular and distinct, in the more falcate fore wings, and the prolonged hind wings. 



[Ab. semicseca, nov. ? . Discal spots on hind wings totally absent, those on fore wings 



very small. Jalapa, Mexico (Schaus). In the male the spots on hind wings may also be 



practically absent.] 



'Life history. 



A lot of 25 eggs kindly given me by the Sydney Ross Co., New York, through Mr. C. B. 

 Riker, had hatched several hours before their receipt on June 6, from eggs laid May 21, 1903. 



Egg. — Oval cylindrical, somewhat flattened; chalky white; the surface seen under a 

 powerful lens to be minutely pitted. Length 2f mm.; breadth about 1| mm. The hole eaten 

 by the larva for its exit is situated at the end of the shell, but sometimes encroaches on one side. 



Larva. — Stage I. Length 6 mm. The body tapers slightly toward the end. The head is 

 as in P. cynthia, being smaller than in C. promethea, and with no pale band ; velvety black-brown ; 

 clypeus-posterior a little paler; clypeus-anterior pale gray or dull livid whitish; the head bears 

 a few scattered black hairs. The body is blackish brown and all the setae are black-brown, 

 being of the same hue all over the body. 



The first thoracic segment bears six tubercles, of which the lowest one is a little larger 

 than those of the row above, and the two median dorsal ones are slightly smaller than those 

 on each side. They are well developed, higher than in C. promethea, and nearly as in P. cynthia. 

 The tubercles of the three thoracic and first abdominal segments of the same size and height, 

 those of abdominal segments 2-7 a little smaller; all are about twice as long as thick; the 

 longer setae are fully twice as long as the tubercles bearing them; those on the second thoracic 

 to seventh abdominal segments are a little curved. Each dorsal tubercle bears 10-11 setae, 

 several arising some distance below the crown; all are of unequal length and thickness; those 

 on the mid-abdominal segments 7-8 in number. The median dorsal tubercle on eighth 

 abdominal segment is twice as thick and considerably higher than those next to it. 



Suranal plate with two tubercles liigher than broad; this and segments 9 and 10 and all 

 the legs, both thoracic and abdominal, are brown-black. 



The body is black-brown; all the segments are ivory white on the posterior edge (the first 

 and second thoracic less so than those behind), and the front edge of the white transverse band 



