12 PROCEEDINGS OF THE ACADEMY OF 



extreme apes, and one to the inner margin, somewhat behind the second 

 marginal branch. The median nervure is wanting. The sub-median simple. 

 Hind wings with no discoidal cell. The subcostal nervure is central and 

 attenuated towards the base, and at about its apical third delivers a 

 branch to the inner margin, and is bifid behind the tip of the wing. The 

 median is simple. The submedian obsolete or wanting. 



Size extremely small. Head and face smooth, covered with closely ap- 

 pressed scales. Face rather broad, and somewhat produced beneath into a 

 point. Forehead rounded. Ocelli none. Eyes extremely small, not visible 

 from above, and scarcely visible in front. Antennae held extended at the 

 sides, very short, scarcely one-half & long as the anterior wings, rather thick, 

 obtuse, and rougheired with scales. Maxillary palpi none. Labial palpi 

 none. Tongue none. 



A. splendorif er ella . Head golden. Antennas fuscous, tinged with 

 golden. Fore wings, from the base to the middle, leaden gray, with a splen- 

 dent lustre, and from the middle to the tip golden, with a broad, nearly 

 straight, metallic, silvery streak, extending from the costa near the tip to 

 the middle of the wing, and dark-margined on both sides. This is nearly 

 joined by a dorsal streak of the same hue, almost opposite to it, with con- 

 verging dark margins, and with a blotch of dark brown scales adjoining it be- 

 hind. In the costo-apical cilia is a short, blackish brown streak, parallel to 

 the dark margin of the silvery costal streak. 



At the tip is a black, apical spot, with metallic, silvery scales in its centre, 

 and a few silvery scales in the cilia above and beneath it. A blackish brown 

 hinder marginal line in the cilia, interrupted by a silvery streak in the cilia 

 beneath the apical spot, and the cilia yellowish brown. Hind wings leaden 

 gray ; cilia yellowish brown. 



The larva mines the leaves of Crataegus tomentosa early in September. 

 The mine appears at first as a very narrow line, and is subsequently expanded 

 into a small, transparent blotch. At maturity, the larva weaves a cocoon 

 between the cuticles, and cuts a small oval disk. This is sometimes carried 

 quite a distance, and is ultimately secured to some object by one of its ends 

 tied down on a little button of white silk. It enters the pupa state toward 

 the latter part of September, and appears as an imago early in spring. 



The mature larva has a head much smaller than the first ring, rounded 

 above, and elliptical. The body is flattened, and tapers posteriorly from the 

 anterior rings. The segments are rather deeply incised, the thoracic ob- 

 tusely rounded at the sides, and the rest with a minute lateral nodule or 

 mammilla. It is without legs or prolegs, but on the second and third thoracic 

 rings, on both the dorsal and ventral surfaces, are spots or cup-like depres- 

 sions, one, on each side, capable of being contracted and expanded. So, like- 

 wise, from the sixth to the ninth inclusive, on the ventral surface are 

 transversely placed oval spots, similar to the thoracic, and one on each seg- 

 ment. On the segment next the last is a protuberance, both dorsal and ven- 

 tral, with two cup-like depressions on each surface. These are not supplied 

 with hooks, and if they are substitutes for feet, must act like suckers. They 

 are all pale brown. The head is dark brown ; the body brown, with blackish 

 along the dorsal and ventral surfaces. 



"When the larvae are young, it is extremely difficult to discover their mines, 

 and the transparent blotch is not much larger than the cocoon, leaving a space 

 in which the ' ' frass ' ' is collected. 



Diachorisia. 



Fore wings pointed, narrowly ovate- lanceolate ; discoidal cell closed behind 

 by a very faintly indicated nervure, with a faintly indicated secondary cell. 

 The subcostal nervure obscurely indicated from the secondary cell to the base 

 of the wing, with a long and distinct marginal nervule from near the base, 



[Jan. 



