124 [August 
Labial palpi, second joint brown, whitish at the end; terminal joint yellowish 
white, sometimes dusted with brownish. 
DEPRESSAEIA. 
Wings with moderate cilia. 
Hind wings rather broad, generally with the inner margin emargi- 
nate opposite the submedian rein and dilated or rounded opposite the 
internal vein. The costal vein is long and contiguous to the costa. 
Subcostal vein simple. The discal vein distinct, throwing off two 
branches. Median 3-branched, the two superior on a short common 
stalk. 
Fore wings oblong, rounded at the apex. Discal cell long and rather 
narrow. The subcostal vein sends off four branches to the costa, the 
first from the basal third of the wing, the last, or apical furcate. From 
the discal vein two branches are thrown otf. The median vein is 
2-branched, the posterior, given off opposite the third subcosto-marginal 
branch, being forked. The fold is thickened towards its tip and the 
submedian is forked at its base. 
Head smooth, scales not appressed. Ocelli none. Antennae with 
joints compressed, hardly denticulate, not pubescent. Labial palpi 
moderately long, reflexed; second joint beneath thickened and rough¬ 
ened with scales, resembling a brush; third joint slender, smooth, 
pointed. Maxillary palpi very short. Tongue of moderate length, 
scaled. Abdomen flattened above., with projecting scales at the sides. 
The larvae of this genus are extremely active, and feed on a variety 
of substances; some in rolled up leaves of composite plants, some in 
the leaves, and others in the umbels of the Umbelliferse; many of the 
latter descend from the plant on the slightest agitation, so that con¬ 
siderable caution is necessary in attempts to collect them. The full 
fed larvae descend to the ground and change to pupae among the fallen 
leaves. The perfect insects have the peculiarity of sliding about when 
laid on their backs. 
D. atrodorsella.—Fore wings yellow ochreous, with several (6 or 8) black 
costal dots from the base to the tip of the wing. On the basal portion of the 
disc is a black dot, beyond which, on the disc, is a rufous colored patch, ex¬ 
tended towards the tip of the wing, and partially interrupted over the middle 
of the subcosto-marginal nervules. Cilia rufous. Hind wings yellowish. 
Thorax black. Antennse dark fuscous. Head above rufous, face blackish brown 
above, yellowish beneath. Labial palpi pale yellow: second joint dusted with 
