ah Fra 
Ff - - ee 
DASYSTOMA. 13 
hinder margin whitish; in this before the middle is a dark fuscous spot, 
and another dark fuscous spot lies in the streak at the termination of 
the discoidal cell, below which, but above the fold, is a small fuscous 
spot; on the costa rather before the apex is a dark fuscous spot, and 
there are some small fuscous spots along the hinder margin ; cilia pale 
grey. Posterior wings pale greyish-fuscous, with paler cilia. 
The female has the anterior wings very short and extremely narrow, 
whitish-grey, with the margins somewhat fuscous. 
South of England, November and December ; not common. 
Genus II. DASYSTOMA. 
Dasystoma, Curt. Ent. Mag. i. 190 (1833); Step. Diurnea p., Haw. 
Cheimophila p., Hib. Lemmatophila p., Treit.; Dup. Exapate p., 
Zell. 
Caput pilis decumbentibus vestitum, epistomio levigato. Ocelli supra 
oculos. Antenne crassiuscule, 4 dense ciliatee. Palpi labiales por- 
recti, pilis vestiti. Haustellum nullum. Ale mediocriter ciliate, 
anteriores oblongo-ovate (? angustate, abbreviate), posteriores 
ovate ( nulle); anteriores: vena apicalis fwrcata supra et infra 
apicem exit, infra eam vene guatuor, ultima parum curva, subdor- 
salis fureata; posteriores: vena apicalis simplew ante apicem exit, 
infra eam vense due e venula transversa, vena mediana bifida. 
Head clothed with decumbent hairs, in front smooth. Ocelli placed 
above the eyes. Antennee rather thick, in the g densely ciliated. La- 
bial palpi porrected, clothed with hairs. Tongue wanting. Wings with 
moderate cilia, the anterior in the ¢ oblong-ovate, in the 2 extremely 
narrow and very short, the posterior in the ¢ ovate, in the 2 wanting. 
In the anterior wings the /wrcate apical vein terminates in the costa, 
and in the hinder margin; below it are four veins, of which the last is 
slightly curved ; the subdorsal vein is fureate. In the posterior wings 
the simple apical vein terminates on the costa immediately 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; the perfect insect 
appears in the spring among sallows, flying by day; the larva 
feeds in the summer and autumn between united leaves of sallow, 
the third pair of feet are club-shaped (according to Lienig, but 
not so according to Preyer). 
1. Salicella, Hiib. Tin. f. 9 (1801); Treit.; Curt.; Step.; Frey.; 
Dup.; Lienig.—Salicis, Haw. Alis anticis dilute grisco-fuscis roseo- 
suffusis, disco dilutiore, macula transversali saturate fusca fere in medio, 
punctis duobus disci fere connexis pone medium, margine postico sa- 
