54 HYPONOMEUTID&. 
SS 
Jail OT ll lee 
of Seythropia being gregarious, furnishes another point of resem- 
blance with Hyponomeuta. ; 
The six genera of this family may be easily distinguished, as 
follows :— 
a. Head rough. 
6. Palpi porrected. 1. SWAMMERDAMIA. 
6 6. Palpi drooping. 2. ScyTHROPIA. 
a a. Head smooth. 
c. Palpi reflexed. 
d. Terminal joint blunt. 
e. Posterior wings with a hyaline patch at the base. 3. Hypo- 
NOMEUTA. 
ee. Posterior wings with no hyaline patch at the base. 6. 
Prays. : 
dd. Terminal joint pointed. 4. ANnsycHIA. 
ec. Palpi porrected, short. 5, CHALYBE. 
Genus I. SWAMMERDAMIA. 
Erminea p., Haw. Lita p., Treit. Telea p., Step. Tinea p., Dup. ; 
Zell. Momphap., Tebenna p., et Swammerdamia p., Hib. 
Capilli hirsuti. Ocelli nulli. Palpi labiales porrecti, breves, filiformes, 
subattenuati. Haustellum breve, nudum. lee anteriores elongatie, 
mediocriter ciliate. Ale posteriores elongato-ovatie, fovcola hyalina 
basali. Ale anteriores: vena apicalis simplex ante apicem exit, 
infra eam tantum rami guingue ; stigma distinetum ; vena subdorsalis 
simplex; submediana a mediana distat, in fine incrassata; poste- 
riores: cellula costalis subito coarctata, ante medium desinente ; vena 
mediana bifida ; cellula discoidalis obtusa. 
Head rough. Ocelli none. Labial palpi porrected, short, filiform, 
rather attenuated. Tongue short, naked. Anterior wings elongate, 
with moderate cilia. Posterior wings elongate-oval, with a hyaline 
patch at the base, In the anterior wings a simple apical vein runs 
into the costa before the apex, below it are only five veins to the hinder 
margin; the stigma is distinct; the subdorsal vein simple; the sub- 
median vein remote from the median vein is posteriorly thickened. In 
the posterior wings the costal cell is suddenly narrowed, and éerminates 
before the middle of the wing ; the median vein is bifid, and the discoidal 
cell obtuse. 
The perfect insects of this genus have a pleasant wavy zigzag 
flight, and frequently disport themselves during the hot sunshine. 
When they repose, it is with the abdomen considerably elevated, 
so that they appear to stand somewhat on their heads; this posi- 
tion, their greyish-white colour, and their cylindric form when the 
wings are closed, cause them to be easily mistaken for the faeces 
i 
