Dec. 1S97.] 
Dyar : New York Slug Caterpillars. 
16T 
THE LIFE -HISTORIES OF THE NEW YORK SLUG 
CATERPILLARS.—XII. 
PLATE IX, FIGS. I-IO. 
By Harrison G. Dyar, A M., Ph.D. 
Apoda biguttata Packard . 
1864 — Limacodes biguttata Packard, Proc. Ent. Soc. Phil. Ill, 34 i. 
1865— Limacodes tetraspilaris Walker, Cat. Brit. Mus. XXXII, 486. 
1874— Limacodes biguttata Stretch, Zyg. & Bomb. N. A. pi. 8, fig. 16. 
1882— Limacodes biguttata Grote, Check List. 
1892—Apoda biguttata Kirby, Cat. Lep. Het. I, p. 553. 
1894—Apoda biguttata Neumogen & Dyar, Journ. N. Y. Ent. Soc. II, 73. 
Larva. 
1894 Dyar, Ann. N. Y. Acad. Sci. VIII, 221 (as A . y - inversa ). 
Special Structural Characters. 
. Dorsal s P a ce broad, narrowing slightly toward the extremities, 
ending behind in the broadly quadrate joint 13, not strongly arched. 
Lateral space broad, oblique, scarcely concave, narrowing a little to¬ 
ward the extremities. Subventral space small, contracted. Ridges at 
first prominent and tubercular, setiferous, later smooth, granular, the 
subdorsal ridge formed only by the change in slope between back and 
sides. Setae of Stage I single, on the thorax ia-iib and iv, on abdomen 
i-iii converted into tapering spines with expanded trifid tips, the upper 
two on joints 4-12 united into a single spine of which one seta forms a 
knot-like prominence on the other, exactly as in A. y-inversa. These 
setae lean in alternating directions. Later the warts are represented by 
short setae, normal in number, not united together; in the last stage al¬ 
most entirely absent. Depressed spaces fairly well developed, small, 
but not very sharply defined, but all present (i)-(8). Skin at first 
smooth, later with secondary spines on the tubercles and conical 
granules, finally uniformly covered with round clear granules. After 
the last molt the specific white coloring definitely appears, of the same 
general character as A. y-inversa. There are six or seven stages. In 
the former case the stage before the last as here described is omitted. 
Affinities, Habits, etc. 
This larva does not differ structurally from A. y-inversa with which 
; 11S stnctl y congeneric, and the same remarks will apply to both species. 
v See Journ. N. Y. Ent. Soc. Ill, 152.) In color it is the same whitish 
