230 PAPERS BY DR. B. CLEMENS. 



forked. The fold is thickened towards its tip and the sub- 

 median is forked at its base. 



Head smooth, scales not appressed. Ocelli none. An- 

 tenna3 with joints compressed, hardly denticulate, not pube- 

 scent. Labial palpi moderately long, reflexed ; second joint 

 beneath thickened and roughened with scales, resembling a 

 brush; third joint slender, smooth, pointed. Maxillary 

 palpi very short. Tongue of moderate length, scaled. Ab- 

 domen flattened above, with projecting scales at the sides. 



The Iarva3 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 

 Umbellifera ; many of the latter descend from the plant on 

 the slightest agitation, so that considerable caution is neces- 

 sary in attempts to collect them. The full-fed larvas descend 

 to the ground and change to pupse 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 disk is a black dot, beyond which, 

 on the disk, is a rufous-coloured patch, extended towards the 

 tip of the wing, and partially interrupted over the middle of 

 the subcosto-marginal nervules. Cilia rufous. Hind-wings 

 yellowish. 



Thorax black. Antennas dark fuscous. Head above 

 rufous, face blackish-brown above, yellowish beneath. Labial 

 palpi pale yellow; second joint dusted with blackish exteriorly ; 

 terminal, with two dark-fuscous rings, one near the base, the 

 other near the tip. 



I have before me a single specimen. 



ENICOSTOMA? Steph. 



Wings broad, ovate. Cilia of hind-wings rather long. 

 Hind-wings broadly ovate ; costa straight, hind margin 

 rounded to the base, scarcely retuse before the tip. Costal 



