No.i3ai. REVISION OF AMERICAN GELECHIID MOTHS— BUSCK. 883 



JTahtfdt. — District of Columbia; Colorado. 



Type.^'^o. 6390, U.S.N.M. 



The species is very near the foregoing, pseudoaeacieUa^ and it was 

 very natural that Chambers, from the imago alone, should identify it 

 as that species; ])ut it is a larger and darker insect, without the whit- 

 ish costal area found \\\ ps.Lnid<xic<icieUa. 



The Q^y<g of this species is laid on the upper side at the tip of a leaf 

 of wild cherry. The young larva spins together the edges of the leaf, 

 and as it grows it folds gradually the entire leaf into a roomy abode, 

 the open end of which it covers with a glistening white, thickl\' woven 

 sheet of silk. In this cell the larva lives in a black tube made from 

 its own frass and spun firm by silk, and it feeds under the protecting 

 sheet of silk, which is gradually enlarged and moved outward as new 

 feeding ground is needed. The larva is very timid and retreats at 

 the least disturliance into its tube of frass, Avhich it, when full grown, 

 forms into an oval cocoon, in which it pupates. The imago issues 

 within the cell and breaks through the sheet of silk. 



The larva is very similar to that of psei(doacacieUa. When 'young 

 it has a black head and thoracic shield, body dirty greenish white, 

 darkest on the under side, and with two narrow longitudinal dark- 

 brown dorsal lines and four (two on each side side) broader lateral 

 lines through all the segments. 



When full grown the larva measures 20-24 mm. in length, with 

 head 1.6 mm. broad. Head and thoracic shield is then light ))rown, 

 lh(> ground color of the body more nearly white, and the stripes more 

 reddish. 



Dr. Dvar, who has bred this insect from larva with identical habits 

 in Colorado, has kindly given me the following technical description 

 of the larva: 



1 It-ad broad, red-l)rown, sutures and ocellar area blackish. Bodj* purple brown 

 with white stripes, narrower than the intervening spaces; irregular dorsal line, sub- 

 dorsal (over tubercles i and ii), lateral (over iii), and broken, broad, distinct, sub ven- 

 tral (over \\\\ and vi). Feet brownish; cervical shield black behind and shad- 

 ing to sordid white before, rather transparent on anterior rim; prespiracular tubercle 

 black. Tubercles small, brown. Thoracic feet black; anal plate luteous; seta? fine 

 and i)ale; abdominal feet reddish, those of joint 13 partly pale. 



In the locality of Washington there are two annual generations. 

 The young larvse are first found in May, and in early June they are 

 full grown and already pupated. Imagoes issue late in July and early 

 in August, and lay their eggs soon after, producing the second gener- 

 ation, which overwinters as full-grown larva in its cocoon and issues 

 as imago next spring. 



The peculiar life mode of the larva and its elaborate architecture 

 reminded me at once, when I found it two years ago, of Clemens' 

 de.scription of his genus Catasteya^ which was founded solely on the 



