Dec. 1898.] Dyar: Life-Histories of N. Y. Slug Caterpillars. 243 
erence for large trees. I have found them rarely in Van Courtlandt 
Park, New York, and in several places on Long Island, most numer¬ 
ously at South-haven and Speonk. Mr. Joutel has found them at 
Glendale, but on small trees, as he tells me. This species is distinctly 
a local one, and when once found, a number of larvae can be secured. 
I have encountered a colony in the District of Columbia on some iron 
wood trees growing on the shores of Rock Creek and overhanging the 
water. The situation is such that any other of our Eucleids could not 
live there, as they would fall in the water and be drowned at pupating 
time. 
The larval stages are passed with unusual rapidity. Mature larvae 
are first seen early in August, and but few last into September. With 
the exception of Kroncza minuta , this is our smallest Eucleid larva. 
Criticism of Previous Descriptions. 
This larva has not been described, yet a specimen was seen by us 
before writing the synoptic table (Journ. N. Y. Ent. Soc., Ill, 146), 
and confused there with Heterogenea flexuosa .* Only the last five 
words of the diagnosis were written actually from a specimen of flexu¬ 
osa ; the other words apply to the species, although not indicating the 
best specific differences. A corrected synoptic table will be given at 
the end of these articles. 
Description of the Several Stages in Detail. 
jE gg .—Very small ; elliptical, flat, shining, slightly milky and iri¬ 
descent. Reticulations obscure, linear, elongated and irregularly 
quadrangular, not peculiar; size .8 x .5 mm., rarely 1.0 x .6 mm. 
Stage I .—Highest in front at first, later higher in the middle and 
more rounded, truncate before, tail rounded. Spines as in T. pallida , 
but smaller, distinctly alternating, the Y-shaped spines of joints 5, 7, 
9 and 11 leaning out sometimes so much so that those of joints 7 and 
9 lean at 90° and those of joints 5 and 11 at 45 0 with the erect ones 
on the strong segments. The anterior limb of the Y-spines has a 
tendency to be shorter, especially on the weak segments, where, as on 
joint 11, it may be scarcely more than half as long as the other and 
lack the cleft tip. Tips bifid or trifid, brown, narrowed just before 
* In the long series of bred Jlexuosa-ccesonia from the collection of the late Mr 
S. L. Elliot, occurs a single specimen of shurtleffii , showing that he, too, had con¬ 
fused the larvae. 
