OP ARTS AND SCIENCES. 241 



described, the eggs laid singly. Mature Caterpillar : Coronal 

 horns of head straight, with stellate or whorled arrangement of the 

 few spinelets. Body enlarged in the middle and tapering, espe- 

 cially behind, many of the developed spines ending in two unequal 

 thorns directed forward and backward. Feeds on Trema (Urti- 

 cacea 3 ). Chrysalis: Distinctive features undescribed. (6Yai#po?, 

 quite fine.) 



Di^thria clymena Cram. (Callicore janeira Feld. ; C. clym- 

 ena var. meridionalis Bates.) Butterfly: Upper surface of wings 

 rich velvety black marked with bright blue, the fore wings crossed 

 by a narrow outwardly crenate belt not reaching either margin 

 from within middle of costal to near end of inner margin, where 

 the scales are metallic; and by a brief preapical slender transverse 

 line; the hind wings with a premarginal, rather narrow, equal 

 band not quite crossing the wing. Under surface of fore wings 

 crimson on more than the basal half, black beyond, crossed near 

 tip by two strongly arcuate, inferiorly tapering white stripes, the 

 inner the broader; hind wings velvety black, the costal margin 

 marked by carmine, the disk with two large irregular double white 

 rings partially encircled by two common larger ones, the outer 

 almost marginal. Expanse 40 mm. Egg: Broad at base, nearly 

 hemispherical, with 10-11 vertical ribs and very delicate cross lines; 

 laid singly. Caterpillar at birth : Head simple and with body 

 green. Mature Caterpillar : Head green, the coronal horns exces- 

 sively long, straight, brownish green, green posteriorly, having 

 four or five equidistant whorls of spinelets. Body yellowish green 

 with yellowish subdorsal stripes and white papillae. Length 22 mm. 

 Feeds in Brazil on Trema micrantha. Chrysalis : Velvety green 

 on back, pale green below; a white and brown stripe follows the 

 alar ridges, continued on the abdomen as an infrastigmatal stripe; 

 white points occupy the position of the subdorsal spines of the cater- 

 pillar. — Has been known to occur once in S. Florida. 



Mestra Hiibner. 



Butterfly : Antennal club long and slender, gradually incrassate. 

 Eyes naked. Second superior subcostal nervule arising at the end 

 of the cell, which is closed by a slender vein; costal nervure very 

 much swollen at the base. Fore tarsi of male excessively short. 

 Early stages : Unknown. (Derivation obscure.) 



Mestra amym6ne Menetr. (Cystineura dorcas Edw.) Butter- 

 fly : Upper surface of fore wings white, the base and costal and 



VOL. XXVII. (n. S. XIX.) 16 



