22 TINEIDA. 
apex incrassatus, subdorsalis longe fureata ; posteriores : venee apicalis 
furcatee ramus inferior in apicem exit, infra eam vense due e venula 
transversa; mediana bifida. 
Head above very hairy, in front more clothed with scales. Ocelli dis- 
tinct behind the eyes. Antenne rather thick, about half the length of 
the anterior wings, sometimes thickened with scales to the middle. Max- 
illary palpi undeveloped. Labial palpi porrected, the second joint very 
haivy, and with a prolonged tuft, the third joint smooth, ascending, 
pointed. Tongue short, not clothed with scales. Wings with mode- 
rate cilia, the anterior oblong, with semi-erect scales (having a rugged 
appearance), the posterior oblong-ovate. In the anterior wings the 
apical vein is fureate, terminating in the costa before the apex, beneath 
it are four veins; the apex of the submedian vein is thickened, and the 
subdorsal vein is for a considerable length fureate; in the posterior 
wings the lower branch of the forked apical vein terminates in the apex, 
below it two veins run from the transverse vein, and the median vein is 
bifid. : 
The perfect insects of this genus are found among grass, but, 
except during the very middle of the day, from 12 to 2 P.M., are 
rarely met with; at that hour they are very active, hopping about 
on the stems of the grass, and taking short flights, but their pe- 
riod of flight once over, they conceal themselves so well that it is 
almost impossible to detect them. ‘The larva of one species (0. 
Birdelia) I have oceasionally met with, when full fed, crawling on 
grass ; but it feeds inside the stems, and in one instance had bored 
down the stem of Dactylus glomeratus almost to the root, and was 
only detected by the fact of an Machista having taken a fancy to 
the same plant of Dactylus, which led Mr. Wing to the discovery 
of the concealed Ochsenheimeria. Mr. Scott also found these 
larvee in the stems of grass. 
We have only three British species in this genus (two others 
are known on the continent) ; they may be readily distinguished 
by the antennee. 
a. Antennee much thickened with scales to the middle. Species 1. 
aa. Antenne very slightly thickened with scales nearly to the middle. 
Species 2. 
aaa. Antenne perfectly simple. Species 3. 
1. Birdella, Curt. B. E. fo. 344 (1831); Step. ; Sta.—Bisontella, 
Sta.—Wediopectinella, Haw.? Step.? Alis anticis griseo-fuscis vel 
obscure ochreis, squamis numerosis exasperatis fuscis, albidisve; alis 
posticis purpureo-fuseis, ipsa basi hyalina. Capillis griseo-fuscis. -dn- 
tennis usque medium valde incrassatis squamis erectis projicientibus. 
Exp. al. 54-64 lin. 
Hairs of the head.and face greyish-fuscous. Antenne at the base 
