OF WASHINGTON. 429 



small granules ; single horn of joint 12 stouter and with larger 

 pointed granule^. Subdorsally and laterally on joints 5 to 12 a 

 stout, pointed, recurved, short horn, silvery white without, red 

 within, less than one-third as long as the thoracic horns; a simi 

 lar, smaller pair on joints 12 and 13 anteriorly ; a small, scarcely 

 silvery horn subventrally on joints 5 to 12. Dorsally a few large, 

 sparse granules, principally in one transverse row posteriorly on 

 each segment ; many granules subventrally, more pointed than 

 the dorsal ones. Anal plate semi-elliptical, not furcate behind (as 

 in bicolor], densely granular around the margin with a double or 

 triple row of white granules, the two most posterior of which are 

 large and erect ; centrally on the plate are about seven rather re 

 mote granules. The granules are all larger and fewer than in A. 

 bicolor. Color green, except the silvery horns and white gran 

 ules, the thoracic horns tinged with brown. A broad, white, 

 substigmatal band on joints 5 to 12, edged with dark red above 

 and yellow below. 



S. anthonilis H.-S. Boisduval remarks : " La chenille est en- 

 tierement noire et pourvue de longues pointes d'egale longueur 

 toutes dirigees en arriere, comme celles d'un herisson lorsqu'il 

 marche. Les epines de la colerette sont bien prononce"es mais 

 beaucoup plus courtes que les autres." Evidently a generalized 

 form. 



S. brevis Walk. Boisduval remarks: "La chenille est fort 

 jolie ; elle est d'un vert jaune avec des pointes couleur d'or tres 

 brillantes de longueur mediocre recourbees et dirigees en arriere, 

 dont celles du second et du troisieme anneau sont dentele"es ainsi 

 que celles qui se trouve au milieu de 1'avant dernier, laquelle a 

 un pen la forme d'une queue recourbee. La colerette n'a pas de 

 pointes proprement dites ; elles sont remplacees par les petits tu- 

 bercules coniques." It is a pity that Boisduval's manuscript name 

 chrysacantha could not have been used for this species. 



^>\ leucantha Boisd. The author says : " Les chenilles . . . 

 paraissent etre vertes ; elles sont munies de pointes blanchatres a 

 sommet noir, de longueur egale, dirigees en arriere, dont celles du 

 second et du troisieme anneau, ainsi que celle qui se trouve au 

 milieu de 1'avant dernier sont un pen dentelees et un peu plus 

 grosses. La colerette est garnie d'une rangee de petites pointes 

 assez saillantes." 



S. argyracantha Boisd. Said to be a variety of 6". crocata 

 Boisd., described on the same page. Two larvae bearing this 

 name from Mr. Ruscheweyh, Buenos Aires, Argentina, agree in 

 general with Boisduval's brief description except that the long 

 thoracic and anal horns appear to have been green, not silvery, a 

 point which Boisduval omits to mention. The head is conic tri 

 angular, flat before, densely granular shagreened, the paraclypeal 

 pieces nearly obliterated ; two narrow, blackish brown lines on 



