144 MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



E. cacleuf:, tlie abdonien orange red, striped narrowly with yellow as in C. hrisaotii Boisd..and 

 C. regaJis. The fore wings are as in E. cacicm, the hind wings as in C pliofoiwa. It is quite 

 different from the 9 of V. hrlxKvtil, which is near me.ricana Grote. But I find that this same 

 9 speeimen agrees well with Cramer's tigure of C. hiocoon $ , though it is quite different fi"om his 

 tigure of the ? . There is, indeed, no important difference except that the discal spot in his 

 figure is not double, but forms a single large yellow patch. The underside of my 9 agrees well 

 with Cramer's figure C of the underside, only differing in the three costo-subcostpl yellow spots 

 being connected, l)ut otherwise the fore and hind wings beneath are marked in the same way. 



1 quite agree with the remark of Boisduval that Cramer'.s figures B and C of his PI. CXVII 

 represent C. ngalw. 



It appears, then, that Boisduval's V. i.rioii is a synonym of Cramer's laocoon. 



Larva — Laat stage. — PI. LV, ffgs. •!, -la. Length, 78 mm. Body of the same general shape 

 as in ('. regalis, thickest on the second and third thoracic segments. Head of the same width as 

 the pi'othoracic plate, pale, of the same hue as the suranal plate. On each thoracic segment 

 there are eight stout spines — four on each side — and there are ten long subequal dorsal spines or 

 "horns." Oil the front edge of the proth'oracic segment the two dor.sal spines are large and 

 high and of the shape and about two-thirds of the size of those on the second and third segments; 

 those of the supraspiracular row small, about one-fourth as long as those of the submedian row, 

 but slenderer. One directly in front of each prothoracic spiracle is low, stout, conical, about 

 one-half as large as that in the lower or infraspiracular row. Of the four dorsal horns. of the 

 second thoracic segment, each are of the same size., length, and thichiess; those of the supra- 

 spiracular row no s:i aller or shorter than those of the dorsal series. On the third thoracic segment 

 they are a little shorter. All the ten spines or horns end in a black polished bulb, the tip end of 

 which is whitish, the bulb bearing several (5-7) conical setiferous tubercles. The spines on the 

 sides of the body are small and short; not so long as or scarcely longer than the dorsal ones are 

 thick. (Fig. 2.) On the thoracic segments those of the lowest row are much thicker, larger, 

 and longer than those of the ne.xt (infraspiracular) row' above. On abdominal segments 1 to 7 

 the dorsal, supraspiracular, and infraspiracular tubercles are all of the same shape and size, all 

 moderately long, acute, not tipped with black, and bearing from 7 to 8 sharp spinules; those of 

 the lowest (infraspiracular) row a little longer than the supraspiracular ones. 



The median spine on the eighth abdominal segment is fully twice as long and large as the 

 dorsal ones on segments 1 to 7. blackish at the acute tip, with rather numerous stout spinules. 

 On each side behind the median spine are two small low tubercles, as in C. sepulcraJis. A stout 

 conical smooth tubercle on segment 'J. which is about one-third as long as the median one on the 

 preceding segment w ith two similar spines on each side of it, though those of the lower row are 

 a little larger and more spinose. 



Suranal plate (fig. 2«) short and l)road, rough on tlie surface, but unarmed (not so spiny as in 

 C. regalis, that of 0. st^ju/cralis being still more armed); a group of four or ffve minute conical 

 setiferoiis reddish pink tubercles on each side, near the base, and a few minute ones along the 

 edge; but it is nuich smoother than in C. sejnderalis and also than in ('. regalin. Spiracles 

 black, inclosing a large pale straw-yellow center. Body green, with reddish pink spines. 

 Legs green; the mid-abdominal ones green with a blackish vertical shade, sometimes broken 

 into two spots. In front of each abdc)niinal spii-acle is a narrow, oblique ascending black line. 

 Anal legs with a few minute spiiuiles. 



Eood plant. — The nature of the plant on which the species feeds is not stated by lUirmeister. 



Geographical distribution. -Canta galli, Brazil (L. Agassiz, Museum of Conq). Zoology, 

 Thayer Expedition; collected by Doctor Teuscher); Brazil, not rare, chiefly found in the envi- 

 rons of Bahia: a \ariety, 9. Iioni Para (iioisduval); Novo Fril)urgo (Boisduval, Biunieister.) 



