Sept. 1896.] Dyar : Life History of Euclea Delphinii. 
125 
THE LIFE-HISTORY OF THE FLORIDA FORM OF 
EUCLEA DELPHINII. 
By Harrison G. Dyar, A. M., Ph. D. 
(Plate V, Figs. 1—13.) 
Larvae found at Lake Worth, Florida, in January, 1896, differed 
from any previously seen by me, and were supposed to represent some 
species of Euclea or Monoleuca not previously bred. However, the 
moths which emerged proved to be E. delphinii. I present herewith 
an account of their life-history in advance of that which Miss Morton 
and I will work out of the New York form, since I have been fortunate 
enough to observe all the stages. I am much indebted to Mr. F. Kin- 
zel, of Palm Beach, for a supply of food plants during the winter 
months. 
The larvae are nearest in pattern and structure to the form provi¬ 
sionally called E. pcenulata ( elliotii ) by Miss Morton and myself (Journ. 
N. Y. Ent. Soc., Ill, 146). They differ in coloration and in having 
a pair of caltrope patches on the subdorsal horns of joint 13, which are 
absent in pcenulata. In both there is a single group of detatchable 
spines and the subdorsal line is unbroken by discolorous patches. The 
synonymy and relations of the several forms of the delphinii group, as 
well as figures of the caltropes and spines will be deferred to our paper 
on the New York species, where we hope to discuss these matters in full. 
Special Structural Characters. 
Dorsal and lateral spaces broad, subventral space narrow, con¬ 
tracted ; ridges very slight, the lateral the most distinct, approximate to 
the subventral. Fleshy horn-like processes unequally elongated; in 
stage I bearing primitive setee; after first molt the subdorsal and 
lateral rows covered with numerous urticating spines, mixed with less 
developed spines bearing setae ; subventral row rudimentary. The sub¬ 
dorsal horns are well developed on joints 3 to 5 and 11 to 13, moderate 
on joint 8, very small on 6, 7, 9 and 10, but none are rudimentary as 
they are in Sibine. Of the lateral row the one on joint 5 is absent. 
Depressed areas feebly developed, usually only their pale glandu¬ 
lar centers visible, under favorable circumstances also the areas them¬ 
selves as slight hollows, smoother than the general surface; dorsal row 
(1) paired, double between joints 3-4 and 4-5, ad-dorsal (2) slight; 
