March, 1S96.] DyAR AND MORTON, New YoRK SlUG CATERPILLARS. T 



Stage V. — Horns shorter than before at first, but they grow consider- 

 ably during the stage, spines longer; the rudimentary horns on joints 6 

 to 10 smaller. Armature essentially as before. Color essentially the 

 same. Horns on joints 3 and 4 flesh-colored, subdorsal on joints 5 and 

 II dark purple brown, this color covering joints 3 to 5 as far as the 

 lateral horns and joint 1 1 below the subdorsal horn and the dorsal patch 

 on joints 7 to 9, which is bordered as before. A yellow dorsal spot be- 

 tween joints 6 and 7, and 9 and 10 ; a distinct round yellow dorsal spot 

 on joints 5 and 12, a white subdorsal patch on joint 12 as before. The 

 rest of the dorsal and lateral areas bright yellowish green, the lateral 

 ridge and subventral area colorless. Two intersegmental lateral depres- 

 sions can now be distinguished beside the dorsal ones. Subdorsal horns 

 on joints 12 and 13 colorless like the lateral ones, above which a straight 

 white line is separated from the green lateral area by a dark transparent 

 line. A faint white line on the subventral ridge. Width of the head i 

 mm.; length of the larva 5.5 to 9.5 mm. 



Stas^e VI. — (Plate I, figs. 17 and 18). Similar to the preceding. 

 Patches over the large horns and adjacent, brown, shading darker at the 

 edges; the anterior one covering the lateral horns, the posterior the 

 subdorsal horns on joint 1 1 and surrounding the white patch between 

 joints II and 12 ; a small dorsal linear spot on joint 4, a round one on 

 joints 5 and 11, yellow. Green dorsal blanket- like patch reaches to the 

 lateral horns extending over joints 6 to 10 and running back laterally 

 beneath the subdorsal horns to end in a point on joint 12. It is edged 

 with black and white in the following manner : A subdorsal crimson 

 brown dash on joints 6 and 10, a dusky band above the lateral horn ; 

 central elliptical patch crimson brown, blackish at the edge, then crim- 

 son, bordered with white and laterally by a crimson brown line. Be- 

 tween the subdorsal horns of joints 1 1 and 12a large rounded pentag- 

 onal white spot. Horns on joints 3 and 4 fleshy brown, the subdorsal 

 on joints 5 and 11 purplish brown, 3.5 to 6 mm. long, the rest colorless. 

 Body rounded rectangular in dorsal aspect, the ends larger than the 

 middle; subdorsal ridge evenly rounded over, lateral ridge prominent, 

 subventral space very small, colorless, a white line along the subventral 

 edge. Depressed areas very small, forming slight hollows, the dorsal 

 and two lateral intersegmental rows present, the rest not distinguish- 

 able. Skin smooth to the naked eye, under a strong lens seen to be 

 densely covered with pointed conical skin spines, dark or colorless ac- 

 cording to the ground color, elongated on the horns. Spines stiff, 

 straight and smooth, black tipped, reddish on the long horns, colorless 



