266 PROCEEDiyaS of the national museum. vol. xxm. 



subventral hairs diffusely spreading. On thorax warts iib and iii 

 are present as single hairs. Warts all surrounded by whitish rings. 

 Joint 2 is so shrunk up as to be concealed; no hairs arising from it. 



Cocoon spun on the cover of the jar, very thin, mostly of hair, the 

 pupa visible; a tuft of hair in front, as in Lymire edwardsl. 



Pupa. — Cylindrical, slightly tapering, head prominent, the thorax 

 sloping; flesh colored, nearly white; traces of the reddish subdorsal 

 line of the larva and rather numerous black marks in double segmen- 

 tal, subdorsal, and stigmatal spots and ventral stripe reaching over 

 cases and all, and the edges of cases, especially the costa of fore wings. 

 Eggs hatched September 15, imago OctoT)er 19'. The species seems 

 to breed continuousl}' until stopped by the cold, unlike CtnucJm vlr- 

 ginica, which has a deiinite hibernating period and is single brooded. 



Food plants. — Species of grass. 



CISTHENE SUBJECTA Walker. 



Cisthcne subjcda Walker, Cat. Brit. Mus., II, 1854, p. 534. — .Stketcii, Zyg. Bomb. 



N. A., 1872, p. 155. — Neumoegen and Dyae, Journ. N. Y. Ent. Soc, I, 1893, 



p. 115. 

 Hypoprepia packurdil Grote, Proc. Ent. Soc. Pliil., II, 1863, p. 31. — ^NIurtfeldt, 



Psyche, III, 1881, p. 243. . 



Miss Murtf eldt has described the mature larva. She found three 

 molts after hibernation. My larvee reached stage V before hilierna- 

 tion, and so would probably not have had l)ut one molt in the spring, 

 perhaps not any. They failed, however, to pass the winter. The 

 following, with Miss Murtfeldt's description of the mature form, will 

 give the full life history of the little species. 



The larva is somewhat anomalous. Like lichen feeders in general, 

 the warts are practically single haired. This reduction, affecting the 

 wart characters of the Lithosiida?, is interesting, though it naturally 

 tends to somewhat confuse the phylogenetic arrangement character- 

 istic of the family. However, we see tubercles ia and ib of the thorax 

 still in line anterio-posteriorly, which seems to be the essential point, 

 although they do not become multiple haired and arc somewhat 

 crowded together. 



Egg. — Rounded conoidal, the Imse flat and concave centrally, not 

 quite so wide as the egg itself; surface pol3^hedral, the cell areas flat- 

 tened, rounded hexagonal, reticulations scarcely raised, rather small, 

 surface slightly shagreened; diameter 0.7 mm. The eggs are laitl in 

 a line, separated from each other and each tipped at an angle so that 

 they rest on only one corner of the base. This gives it, at first sight, 

 the appearance of having an odd, unusual shape. 



Stage I. — Head rounded, bilobed, clj^peus moderate^ high; color- 

 less, transparent, a black patch on the face of each lobe above, another 

 over ocelli; labrum l)lack; vertex faintly brown shaded; width, 0.3 mm. 

 Body cylindrical, arctiiform, segments well marked; feet normal, with 



