1864.] 
423 
H. Bassettella. —Fore wings bright reddish-orange, sometimes tinted with 
yellowish-orange, with a black spot at the base above the fold of the wing, and 
a broad black stripe, showing bluish or greenish reflections, along the inner 
margin, extending from the middle of the fold to the tip of the wing and occu¬ 
pying nearly one-half of the breadth of it. Along the costa, about the middle 
of it, is a shining black stripe, which becomes narrower as it approaches the 
apical third of the wing. Cilia blackish. Hind wings shining, dark greenish- 
black. 
Head and thorax black. Antennae black. Labial palpi, yellowish-orange. 
I am indebted to the kindness of Mr. H. F. Bassett of Waterbary, 
Conn., for a number of specimens of this interesting gall miner. Mr. 
B. says the species is rather common in his neighborhood and the larva 
feeds in a gall found on “ a species of oak which I call Q. Tinctoria.” 
The galls are formed on the smaller branches, three or four being 
aggregated, are globular, yellowish-brown, shining and hard. 
The species is dedicated to the discoverer, who will doubtless work 
out its larval history. 
CYCLOPLASIS, n. gen. 
This new generic type is an extremely novel and interesting one, 
not only on account of larval history, but the structure of the perfect 
insect. It is a type that is probably peculiar to our own continent. 
The hind wings are so extremely narrow as to be hair-like, or spine¬ 
like, dilated near the base, so as to resemble a paddle; they are adorned 
with very long cilia. The median vein is very short and placed near 
the basal angle and is branchless. The subcostal vein is attenuated 
towards its base, is adjacent to the costa, distinct in the basal third of 
the wing and runs through the middle of the setiform portion, and is 
likewise branchless. 
The fore wings are narrowly lanceolate. The subcostal vein is atten¬ 
uated towards the base, is placed near the costa and without branches. 
The median vein is distinct and placed in the middle of the wing; it 
is delivered to the acute tip of the wing, near which it is probably fur¬ 
cate sending a very short, indistinct branch to the costa, which how¬ 
ever can scarcely be seen under a inch lens. The submedian vein 
is obsolete. 
Head smooth, with appressed scales. Face and forehead broad. An¬ 
tennae setaceous, short, slightly more than one-half so long as the body. 
Ijnbial palpi, short, separated; in the living imago, ascending but 
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