452 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



distinct broad deep orange spiracular line, edged slightly above, and broadly below, 

 with whitish. The head is blackish in front, with a whitish V-shaped mark and a 

 whitish dash in the middle of the V or clypeus ; labrnra whitish. 



Full-fed larva, molted August 16 to 20. — Same characters as before the last molt, 

 only differing in being much larger. Body cylindrical, with stout spinulated spines 

 arislneiu whorls from small conical tubercles, arranged in seven rows on the thoracic 

 and five rows on the abdominal segments; the spinules at tip very sharp and 

 poisonous, often ending in a stiff hair; about twelve spinules on each tubercle ; some 

 of the lateral abdominal and thoracic spinules tipped with black. Head of the usual 

 size, rather large, pea-green ; the eyes, except the posterior one, situated on a black 

 spot ; labrum pale amber. Body and spines pea-green. On the abdominal segments 

 is a lateral broad bright reddish spiracular band, broadly- edged with white below ; 

 this line extends to the end of the outer side of the anal legs. Spiracles whitish, 

 narrowly edged with black; ends of the abdominal legs and entire thoracic legs red- 

 dish. Length, QQ"^"^. 



21. Gluphisia trilineata Pack. 



Mr. Howard L. Clark has reared this moth from caterpillars fouud on 

 the balm of Gilead at Warwick, R. I. The moth appeared July 22, 

 having been in the chrysalis state about ten days. 



22. Icthyura inclusa Hiibn. {Clostera ainericana Harr.) 



The caterpillar of this moth occurred on the poplar (P. grandidentata ?) 

 at Providence, September 11 to 15. They were living within a tent 

 made by drawing two or three leaves together, several smaller branches 

 of the tree having been defoliated by them. It pupated a few days 

 after, the moth appearing in the breeding cage June 1 of the next year. 



The following account is copied from Harris, who observed them on 

 the balm of Gilead : 



August and September, 1835 : Gregarious caterpillars on the balm of Gilead tree; 

 folding up the leaf and lining it with silk as a common web, the petiole being also 

 fastened to the trunk by silk. 



Larva. — Color of the larva yellow ; head, geminate tubercles on the fourth and 

 eleventh segments, tip of last segment, and true feet, black ; three nari-ow dorsal and 

 three broader lateral vittse, and spiracles, black. The larva is much like that of 

 Clostera anachoreta (Ernst, 165, fig. 214) and C. reduaa (Ernst, 165, fig, 216) and 

 closely resembled C. anastomosis. Thin cocoon formed in a box October 4, 1835. 

 Another cocoon formed in October, 1837, disclosed the imago June 15, 1838. 



August 10, 1838: Fouud the larvi© in great abundance on the balm of Gilead tree. 

 These caterpillars are gregarious, and form a common shelter consisting of a leaf 

 folded longitudinally and lined with a thick web of silk, beneath which the insects 

 are sheltered when not feeding. They eat the whole of the leaves except the veins, 

 which remain untouched. The petioles of the small leaves used as habitations are 

 fastened with silk. The larger leaves subsequently used for shelter are not thus 

 secured. They do not eat the leaves which serve for habitations, but sometimes fold 

 one-half of the leaf and eat the corresponding side. When fully grown the cater- 

 pillar measures one inch and a half or more in length. They do not vary in color or 

 markings at different ages. Body slightly hairy, light yellow, the head, true feet, a 

 double wart on the fourth, another on the eleventh anal valve, three slender dorsal 

 stripes and three broader lateral ones on a dusky ground, and the spiracles, black. 

 In the oldest caterpillars there is an orange-colored line, at the sides of the body- 

 below the spiracles. The upper lateral black stripe is the broadest and becomes 



