180 ARGYRESTHID M. 
coidalis venas ¢ves in costam, venam fureatam in apicem, venas tres 
in marginem posticum emittit; subdorsalis fureata; posteriores : 
yena discoidalis trifida, ramum unum in costam, ramos duos in mar- 
ginem posticum mittens, infra eam vena unica libera. 
Head.smooth. Ocelli none. Antenne rather thick, longer than the 
half of the anterior wings. Tongue naked, Labial palpi rather droop- 
ing, thickened with scales, with the apex blunt. Wings with long 
cilia, the anterior elongate, the posterior acuminate. In the anterior 
wings the discoidal cell emits from its apical angle ¢hree veins to the 
costa, a furcate vein to the apex of the wing, and three to the hinder 
margin; the subdorsal vein is furcate; in the posterior wings the dis- 
coidal vein is trifid, sending one branch to the costa and two to the 
hinder margin; below it is a single free vein, 
Only one species is known in this genus, which unites the 
habits, as it combines the structure, of Zizagma and Gracilaria ; 
having the anterior part of the body slightly raised in repose, yet 
having the sharp jerking motions of a Zinagma ; it frequents the 
Achium vulgare when in blossom ; its larva is unknown. 
1. Ocnerostomella, Sta. Ent. Trans. i. n. s. Proc. 6 (1850). 
Alis anticis nitide griseis, macula dilutiore obsoleta dorsali pone me- 
dium. Exp. al. 34-4 lin. : 
Head and face shining grey. Palpi pale grey. Antenne fuscous. 
Anterior wings shining grey, with an obsolete paler spot beyond the 
middle of the inner margin; cilia grey, mixed with paler and darker 
scales. Posterior wings greyish-fuscous, with greyish-ochreous cilia. 
Common among Aehium vulgare, at the beginning of July, 
flying at dusk. I have taken it abundantly at Box Hill. 
Famity VII ARGYRESTHIDA. 
Capilli hirsuti, epistomio levigato. Palpi maxillares nulli. Palpi la- 
biales breyiusculi, articulo terminali subacuto vel obtuso. Als an- 
teriores elongatee, posteriores lanceolate, longe ciliate. 
Head rough; the face smooth. Maxillary palpi none. Labial palpi 
yather short ; the terminal joint hardly acute, or obtuse. Anterior wings 
elongate; the posterior lanceolate, with long cilia. 
The four genera in this family have considerable affinity with 
each other, though differing in several points ; they may be readily 
distinguished as follows :— 
a. Anterior wings not subfaleate. 
b. Palpi rather short, with appressed scales; terminal joint rather 
pointed. 1, AnGyREsTHIA. 
4b. Palpi shorter, thicker, and hairy. 2. Cepustis. 
