220 Psyche [December 
pared, also nymphaata of Europe. Head somewhat wider than 
high; small compared with width of body; front somewhat higher 
than wide, reaching more than two-thirds way to the vertex; the 
sete far apart and high up, the punctures only a third as far apart 
as the setze, and much lower; adfrontals slender, not entirely well 
defined from the epicrania; reaching vertex, but not quite com- 
pletely separating front from epicrania below, with setz close 
together and decidedly below the puncture. Labrum with w 
rather higher than 7, 72 much below w, moderately notched. 
Epicrania with 7 near to adfrontals; with five ocelli, the posterior 
one being wanting. Antenne with second joint four to seven 
times as long as wide, longer in Nympheeella and Paraponyx than 
in Hydrocampa, with one seta at about two-thirds its length, the 
long seta only about three-fifths as long as the joint; third and 
fourth joints equally long. Body very variable in shape in life, 
when preserved, short and broad, with tracheal gills in the sub- 
genera Nympheella and Paraponyx. Ventral prolegs rudimen- 
tary, with an ellipse of crotchets, alternatelyof two or three lengths, 
hardly interrupted in the first two genera, but broadly inter- 
rupted at the inner and outer ends in Hydrocampa. Anal pro- 
legs with an ellipse of hooks in the former, broadly interrupted 
behind; in the latter, a single short straight band. 
Spiracles of segments A2, 3, and 4, enlarged, the others rudi- 
mentary. 
1. N. (Nympheella) maculalis was very common wherever either 
of the waterlilies grew, and for some distance about on the shore 
males were plentiful. The male varied but little; but of the female, 
beside the typical ash-gray form some were pale brown, marked 
almost as in female obscuralis or with dark bands; some were 
gray with paler costa; and one or two white, with a few fragments 
of black lines (ab. masculinalis). Plenty of caterpillars were bred; 
and they are undoubtedly those noted by Dyar as gyralis (?). 
The caterpillar forms a nest on leaves of the two waterlilies, 
Castalia and Nymphea (Nuphar), and also on Brasenia, by cut- 
ting out a piece of the margin, and attaching it by silk to either the 
upper or under surface of the leaf. This nest is a broad oval, and 
when full sized is about an inch to an inch and a half long, and 
forms a rounded hump in the leaf when on the under side. (These 
were caterpillars of the first brood, in July.) When taken into 
