June, 1897.] DYAR : LlFE-HlSTORIES OF N. Y. SLUG CATERPILLARS. 59 
to ocherous brown and the bright red shade bordering the green out¬ 
wardly may be distinct or wanting. 
The forms have a certain dependence on locality. In the Hudson 
valley the delplimii form predominates, rarely becoming as green as 
viridiclava ; on Long Island the tendency is towards green and the 
elliotii form is frequent. The species ranges to the South, our locality 
being toward its northernmost extension. In the southern part of 
Florida the delphinii form appears, approaching the true cippus of Dutch 
Guayana. According to Cramer’s figure, cippus is a brown moth with 
three green patches, the third at the end of the cell, apparently. This 
is a form which our species has no tendency to assume, and if it really 
extends into South America, it is more likely to be represented by 
Euclea cemilia Stoll, which differs from the delphinii form in having 
the basal patch yellow, instead of green, a variation which is occasion¬ 
ally indicated in New York specimens. 
Euclea dicolon Sepp, is also nearly related, but has a very dif¬ 
ferently colored larva. In the Mississippi valley and Texas, the forms 
pcenulata and incisa occur. The larva of the latter is unknown and 
I have no opinion as to its relation to our species; but the larva of 
pcenulata as described by Professor French does not differ from those 
which have produced viridiclava and elliotii here. The moth of 
pcenulata is only slightly more green than elliotii and it seems prob¬ 
able that it is a variety of our species. 
The variation in the larvae is considerable. In our preliminary 
synopsis (Journal III, 146), we recognized pcenulata as distinct from 
delphinii on the characters of the number of detachable spine patches 
and coloration; but further experience renders this view untenable. 
There is a certain local tendency coupling the forms of larvae with the 
moths as indicated in our table. In the Hudson valley the larvae are 
generally green with red or yellow horns, the subdorsal band broken by 
brown spots and the four spine patches well developed. On Long 
Island the terra cotta form prevails, though not exclusively, without the 
brown spots and with feebly developed spine patches. However, rarely 
the terra cotta colored form has four spine patches; such a larva pro¬ 
duced a moth of elliotti. Then the Florida larvae, having the charac¬ 
ters of pcenulata in the unbroken subdorsal band and single pair of spine 
patches, but the green color of delphinii , have recently been described in 
this journal. The moths were delphinii , and thus all the differential 
characters have vanished, leaving a single variable species with a ten¬ 
dency towards local forms. 
