(LITHOCOLLETIS) NOVEMBER, 1859. 79 



apex is a small patch of scattered black scales ; the hinder- 

 marginal line rather indistinct ; cilia saffron, paler on inner 

 margin. Hind-wings shining silver-gray, cilia rather darker. 

 I am unable to give any account of this species. The 

 specimens were unmarked by any number referring to my 

 notes, and I suppose I must have mistaken it for some other, 

 as I did not observe its peculiar markings until I came to 

 write the present paper. I hope, however, to supply its 

 larval history next season, now that the species thus far met 

 with are tabulated in a manner which will facilitate recognition. 



The following genus belongs, in the arrangement of Euro- 

 pean systematists, to the family JElachistidce. I do not think 

 any argument necessary to prove that it is a natural portion 

 of Lithocolletidce, which is usually regarded as being com- 

 posed of a single genus. 



Tischeiua, Zeller. 



Head with a rather erect frontal tuft of scales ; the front 

 smooth, narrow and but little inclined. Ocelli none. Eyes 

 rather salient, naked and not covered with scales in front. 

 Antennae scarcely more than one-half so long as the anterior 

 wings, with rather long pilose ciliations beneath in the £ , 

 simple in the ? , with the basal joint tufted in front. Max- 

 illary palpi very short and scarcely perceptible. Labial palpi 

 short, filiform and drooping. Tongue scaled, as long as the 

 anterior coxas. 



The wings with long cilia; the anterior pointed, almost 

 caudate, the posterior lanceolate. The discoidal cell of the 

 anterior not pointed, closed in front by a very faint nervure, 

 and with a faintly indicated secondary cell, beyond which the 

 subcostal nervure is almost obsolete. .The subcostal nervure 

 sends four veins to the costa, the first of which is rather long 

 and arises near the basal third of the wing ; the discal emits 

 a simple vein to the costa above the tip and one to the inner 

 margin beneath. The median nervure sends two veins to the 

 inner margin near the tip. The submedian is simple. 



