CEMIOSTO.MA. 



287 



leaf-minors, forming flat blotches in the leaves; that of C. ftparti- 

 fol'iella however has a dillereut habit, mining nnder the bark of 

 the stems of broom. 



The genus may be thus divided : — 

 a. Anterior wings white. Species 1, 2. 

 a a. Anterior wings leaden-grey. Species 3. 



The first two species are so siiuihu- in the perfect state as to be 

 hardly distinguisliablc; (another white species fre([uenting aspens, 

 and a leaden-grey species frequenting ILypencnni, occur on the 

 continent.) 



1. spartifoliella, lliib. Tin. 335 (ISlfi); Step.; Pup.; Zell. ; 

 Sta. — punctanrella, Haw. — IlarriseUa, Ijinn. ? AHs anticis albis, ma- 

 cula costos pone niediuni dUutc tlava fusco-niarginata, macula altera 

 costce apicem versus laferibns converyenlihm, macula atra violaceo-pu- 

 pillata ad angulum analem, striis tribus luscis i)er cilia radiant ibus. 

 Exp. al. 3| liu. 



Head and face white. Antenna! fuscous, the tip and basal joint 

 white. Anterior wings white ; on the costa beyond the middle is a 

 pale yellow spot obliquely ])laccd, pointing towards the anal angle, and 

 margined on both sides with fuscous ; towards the apex is another 

 spot on the costa placed more perpendicularly, its couverfjing sides arc 

 margined with fuscous ; below it is a black spot with a violet pupil ; 

 the apex of the wing is yellow, with a small fuscous spot ; cilia white, 

 with three dark fuscous streaks, one towards the costa, one to the ex- 

 treme apex, and the other, originating at the same point, drooping. 

 Posterior wings white, with white cilia. 



Abundant from the middle of June to the end of July, among 

 broom. The larva feeds in the spring under the bark of broom, 

 making long, nearly straight galleries ; when full-fed it emerges 

 from its subcortical burrow, and spins its snow-white cocoon on 

 the stem, under the shelter of a projecting bud. The cocoons 

 may be advantageously collected at the beginning of June;. 



2. Laburnella (v. Heyden) ; Sta. Sup. Cat. p. 11 (18.51). Alls 



anticis albis, macula costre pone medium dilute (lava fusco-marginata, IJ^ .\/3\\ . 

 macula altera eostre apicem versus, laleribus jjaralldis fusco-marginatis, Q <^'^ 

 macula atra violacco-pupillata ad angulum analem, striis tribus fuscis 

 per cilia radiantibus. Exp. al. 3^ lin. ^. X- -la -» 



Head and face white. Antenna? fuscous, the tip and basal joint ' 



white. Anterior wings white ; on the costa beyond the middle is a 

 pale yellow spot obliquely placed, pointing towards the anal angle, 

 margined on both sides with fuscous; towards the apex is another 

 yellow spot on the costa placed more perpendicularly. Us parallel sides 

 are margined with fuscous ; b(;low it is a black spot with a violet pupil ; 

 the apex of the wing is yellow, with a small fuscous spot; cilia white, 



