258 
THE BEAUTIFUL CHINA MARK. 
Hydrocampa Nymphaata. 
PLATE XXIX. Fig. 1. 
Phal. Geom. Nymphseata, Phal. Stagnata, Don. xi. 
PL 363, fig. 2.— Pyrauata Nymphealis, The Beautiful Cliioa 
liiark, Haworth . — Hydrocampa Nymplisaata, Latr.y Sieph, 
The genus Hydrocampa ( Water-caterpillar ) we 
havfe given as an example of the pretty numerous 
family of the Pyhalida;. It belongs to a section 
of that group, the species of which are somewhat 
remarkable for possessing four distinct palpi, the 
maxillaiy pair being likewise developed, contrary to 
what is observed in the generality of moths. Tlie 
labial palpi are, as usual, tri-articulate ; the two 
lowest joints densely clothed with scales, the ter- 
minal one acute. Tlie proboscis is rather long, the 
antennae moderate, and simple in both sexes. All 
the rvings have the hinder margin entire, the ante- 
rior pair elongate, the posterior ovate-triangular ; 
the surface reticulated uith dark lines upon a white 
ground. The legs are long and slender, the hinder 
tibiae vrith two pair of long spurs. The larva, which 
has six scaly and ten membranous legs, feeds upon 
