DASVSTOMA. 13 



liiiuier niai'^iu w liitisli ; in this Ijclbrr the middle is a dark fuscous spot, 

 and another darls. t'useous sjiot lies in the streak at tlie termination of 

 the discoidal cell, below which, but above the fold, is a small fuscous 

 spot; on the eosta rather before the apex is a dark i'useous spot, and 

 there are some small fuscous spots along the hinder margin ; cilia pale 

 grey. Posterior wings pale greyish-fuseous, with paler cilia. 



The female has the anterior wings very short and extremely narrow, 

 whitish-grey, with the margins somewhat fuscous. 



JSoutli of England, jN'ovcmbcr and December; not common. 



Genus II. DASYSTOMA. 



(H^X 



Dasystoma, Curt. Ent. Mag. i. 190 (1 S33) ; Step. DmrHen p.. Haw. 

 Clinidopldla p., lliib. Leiniiiulophila p., Treit. ; Dup. Kxupala p., 

 Zell. 



Caput pilis deenmbcntibus vestitum, epistomio huvigato. Ocelli supra 

 oculos. Antenn<ie crassiusculai, (^ dense ciliata}. I'alpi lal)iales/;or- 

 redi, pilis vestiti. llaustellum nullum. AUi3 mediocriter ciliatae, 

 anteriores oblongo-ovattc ( $ angustat;i!, abbreviate;), posteriorcs 

 ovatffi ( ? imllai) ; anteriores : vena apicalis fnrcaia supra et infra 

 apicem exit, infra cam vena? qnatuor, ultima parura curva, subdor- 

 salis furcata; posteriorcs: vena apicalis simplex ante apieem exit, 

 infra earn \er\<Q duc« e venula transversa, vena mediana bifida. 

 Head clotlicd with decumbent hairs, in front smooth. Ocelli placed 

 above the eyes. AntenniC rather thick, in the (^ densely ciliated. La- 

 bial \yd\in por>rc/ed, clothed with hairs. Tongue wanting. Wings with 

 moderate cilia, the anterior in the <^ oblong-ovaie, in the $ extremely 

 narrow and very short, the jjosterior in the ^ ovate, in the ? wanting. 

 Tn the anterior wings the furcate apical vein terminates in the eosta, 

 and in the hinder margin ; below it arc four veins, of which the last is 

 slightly curved ; the subilorsal vein is furcate. In the posterior wings 

 the simple apical vein terminates on the eosta inunedialely before the 

 apex, below it are two veins from the transverse vein ; the median vein 

 is bifid. 



There is only one species in this genus; tlie perfect insect 

 appears in the spring among sallows, Hying by day; the larva 

 feeds in the summer and autunui between united leaves of sallow, 

 the third pair of feet are club-shaped (according to Lienig, but 

 not so according to Frcjjer). 



1. Salicella, lliib. Tin. f. 9 (ISOI); Treit.; Curt.; Step.; Frcy.; '?f- ^ 

 Dup.; Lienig. — Salicis, Haw. Mis antieis dilute griseo-fuscis roseo- 

 sutfusis, disco dilutiore, nuicula transversali saturate fusca fere in medio, - 

 punctis duobus disci fere eonnexis pone medimu, niargine postieo sa- 



C 



