INSECTS INJURING OAK-LEAVES. 147 



Moth. — The shape of body aud wings are well represented by Fig. 50. The general 

 color is a rich, dark, velvety reddish-brown. The only markings on the fore wings 

 are two twin golden dots, nearly united to form a short line near the apex of the 

 female, while in the male there are two more near the base of the wing beneath the 

 median vein. Hind wings pale reddish-brown ; expanse of wings, 36""™. 



202. The skiff caterpillar. 

 Limacodes scapha Harris. 



This is a singular boat-shaped triangular caterpillar, green, spotted 

 above with brown, pale beneath, the sides raised and the dorsal surface 

 flattened •, forming in the autumn a tough rounded oval cocoon, covered 

 by an outer thin envelope 5 the moth appears in June. It also occurs on 

 the hickory and wild cherry. 



Larva. — Ground-color pale apple green. The segments extended laterally in the 

 middle of the body, and raised into an elevated ridge, sharp and angular at the 

 edges. The flattened portion, which includes the dorsal region, is chestnut brown 

 darker on the margins. There is also a darker dorsal stripe. The segments are 

 arranged like the plates of a tortoise. The latter region is 

 of a pale yellowish-green, with an oval white spot on seg- 

 ments 9 and 10. Spiracles pale brown, mouth-parts also 

 brown. In some specimens the brown color of the back 

 is reduced to small patches, and occasionally a yellow dor- 

 sal line is present, the ground color tpale green) then pre. 



vailing. Length, 0.85 ; width, 0.25 inch. Food-plant, wild ,, , 



1- /TT ^1 A A ^^^■ 4.^^ ^ ' FiG.51.— Limacodes scapha. 



cherry. (H. Edwards and Elliott.) -^^^ ^j^p 



Moth. — It is light cinnamon brown ; on the fore wings the 



costo-median region is filled in wiih a large tan-brown triangular spot, ending on the 



tip of the wing, aud is lined externally with silver. Expanse of wings, 26 to 28™™. 



203. Limacodes iigultata Packard. 



We have bred this species from a larva found upon the oak, October 

 7, at Providence, E. I. The caterpillar agreed with Harris' description 

 and figure of L. scapha in his Correspondence, and I referred it to that 

 species, but the moth, which appeared June 1, proved to be the present 

 species. There also occurred on the oak at Brunswick, Me., a larva 

 like that of L. scapha, but the elevated ridges were white ; the body was 

 green, with no other color. It spun a cocoon August 27, but afterwards 

 died. 



Moth.— A. little smaller than L. scapha; of a soft velvety buff-brown ; a whitish 

 line reaches from the middle of the internal margin across and outward to the mid- 

 dle line. A short corresponding one from near the costa goes to the middle of the 

 outer margin, thus making an inverted broad A, inclosing at the internal angle a 

 roundish red spot ; apex red. Hind wings and under side of the hind body uniform 

 obscure buff brown. It is a soft, woolly species with thick scales concealing the 

 veins. Expanse of wings, 25™™. 



204. Sisyrosea inornata Grote. 



This singular and beautiful slug- worm was first described and figured 

 in Harris' Correspondence (PI. II, fig. 7; III, fig. 6). It also occurred at 

 Providence on Quercus alba, October 7-9; October 10 it spun a round, 



