March .897.] DVAR : LiFE-HlSTORIES OF N. Y. SlUG CATERPILLARS. 9 



purple patches extending on joints 3 to 7 and 9 to 12, separated by a 

 green space. Spines with black tips, rather delicate ; skin closely and 

 finely clear granular. Depressed spaces (i) and (2) indicated as glan- 

 dular dots, large lateral ones (4) as ill defined hollows, all obscure. 

 Head greenish, eye black. Length, 4 to 6.5 mm. 



Sta-e. r/— As before; patches dark reddish purple. Subdorsal 

 horns on joint 6 and 7 moved outward a little, not in line with the 

 others ; that on 8 rather larger than the other short horns. A distinct 

 green line edges the subdorsal band below. Dorsal purple band broken 

 as before or continuous, incised at the large horns. Sometimes the sub- 

 dorsal horns of 1 1 and 1 3 are red tipped as well as 3 to 5 and 1 2 J he 

 purple band is bordered with crimson ; a pale dorsal line ; no caltropes. 



Length 5.7 to 9 mm. 



Sta<re F//.— (Plate I, Figs. 9, 10 and n) Appearance as before, 

 but there are caltrope patches (Plate I, Fig. 14) on top of the lateral 

 horns of joints 6 to 12 and a large one on joint 13. Dorsum purple, 

 darker at the edges, incised by yellow on joints 4. 5. §' ^^ ^nd 12 ; a 

 straight pale dorsal line and the glandular dots (i) whitish, two pairs 

 on incisures 3-4 and 4-5, one pair in the other incisures. Addorsals 

 (2) indicated as tiny pale dots, seen on joints 9 and 10. Long horns 

 on 3, 4, 5, 8, II, 12 and 13 red, the rest yellow, the largest .6 to .7 

 mm long, the shortest rounded. Sides green, darker below both ndges, 

 a broken whitish line along lateral ridge. Depressed spaces (4) show 

 faintly and an ill defined hollow between the segments subventrally (7). 

 Skin with low conic clear granules (Plate I, Fig. 12); spines small, black 

 tipped (Plate I, Fig- 13)- Length 8.2 to 11.8 mm. 



Besides this, the usual form, examples occur with more red, or 



with less. r Q 



Form ^.—Normal; no red except the subdorsals of 3 to 5, S, n 

 and 12, and the lateral of 3. Sides green, a broken yellow line on lat- 

 eral ridge. ,, j 



Form ^.-Subdorsal horns 3 to 13 and lateral 3 all red; some 

 yellow shading in the lateral space, the lateral line nearly continuous. 



porm C —Horns red and a vermilion stripe connecting their 

 bases on joints 3 to 1 2 ; purple marks with a crimson edge and a blurred 

 irregular, crimson band in the lateral space, shading into the subdorsal 

 red anteriorly ; below it a yellowish or whitish shading. 



Form D -Subdorsal horns on 3 reddish, all the rest yellow ; dor- 

 sal purple band pale, edged with green inside the yellow Ime, divided 

 by yellow on joints 8, 11 and 12. 



