626 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
niug through it. The tubercles of twelfth and thirteenth segments are now yellow, 
and at the base of those of 5, 9, 10, and 11 are some bluish dots. Upon being 
touched, the young larva exhibited the usual retractile horns. These were situated 
at the base of the head, between it and the second segment. They were pale orange, 
much darker at the tips. I regret that I could not carry these larva farther than 
this stage. I was called away from home, and on my return found them dead. Three 
larro were obtained from eggs observed to be deposited by the female upon Jinn* 
riridh. The following is the record of changes : Eggs deposted July 8, larva hatched 
July 13, larva first molt July 15, larva second molt July 18, larva third molt July 22, 
larva showed retractile horns July 24. (Papilio, ii, p. 114.) 
5. Halesidota maculata (Harris). 
Tbe young larva of Halesidota with yellow and black tufts occurred 
upon the alder September 1, 8 to 9 nun long. They must have just 
molted, as in a previous younger stage the larva has much longer, more 
irregular, scraggly hairs along the back. 
Young larva. — It differs much from the full-grown larva in the body being cylin- 
drical, the hairs long, uneven, and very sparse compared with the full-grown larva. 
Head narrow, deeply lobed above, black. Segments 4 to 9 yellow above, elsewhere 
white, and on the sides marked with black lines. Oil third thoracic and second and 
seventh abdominal segments the double spike-like black tufts are, though high, not 
so long as some of the dorsal hairs. 
6. Halesidota carya? (Harris). 
This also occurred on the alder, with the preceding species. 
7. Limacodes ? sp. 
The slug caterpillar described below occurred both on the hazel and 
alder September 20, at Providence, R. I. 
Larva. — In outline regularly oval cylindrical, with two subdorsal sharp ridges, 
dividing the upper surface into a dorsal, and two somewhat wider concave lateral 
areas. Pale pea-green, the two subdorsal ridges yellow, and with a broken yellow 
line on each lateral acute ridge. In the median or dorsal area is a median row of 
round straw-yellow spots, with a small central depression and a lateral row of small 
rounded alternating dots. Two rows of similar yellow spots on the lateral area. 
Length, 8 mm ; breadth, 5 mm . 
8. Apatela hastulifera (Abbot-Smith.) 
This common hairy and tufted caterpillar occurs late in summer and 
through the early autumn from Maine to Georgia, and is the larva so 
often found ichneumonized, attached firmly to branches, and perforated 
on the back and sides with holes out of which the flies have escaped. 
We have found the larva on Betula populifolia in Maine August 28 
to September 4. 
Young larva 12 mm in length. — Differs from full-grown larva in the hairs on the upper 
side of the body being much paler, contrasting less with the yellow on the sides and 
ends of the body ; the hairs are also less closely cropped ; head more deeply cleft, the 
lateral prominences more marked and head less rouuded than in full-fed larva ob- 
served August 28. 
