126 
Psyche 
[December 
Apical segment of the palpus white-tipped; anal vein 
entirely dark without spots : walkeri 
3. Costal margin of wing with two white or yellowish-white 
spots, a large one beyond the middle and a small one 
at the apical end : punctipennis 
Costal margin of wing without white or yellowish- white 
spots 4 
4. Fringe at apex of wing with a distinct light yellow to 
coppery spot: maculipennis 
Fringe at apex of wing without a distinct light yellow to 
coppery spot mm. 5 
5. Wing with dark scales uniformly distributed : ____ barberi 
Wing with the dark scales definitely aggregated to form 
dark spots at the base of the radical sector, at cross- 
veins r-m and m-cu, at fork of R 2 and R 3 and at fork 
of M 1+2 and M 3+4 : quadrimaculatus 
Larvae 
1. Abdomen with plumose lateral hairs (Fig. 9) on first 
six segments ; head hairs simple : barberi 
Abdomen with plumose lateral hairs on first three seg- 
ments; head hairs plumose 2 
2. Abdominal segments 4 and 5 with two conspicuous 
tufted hairs (Fig. 11) (hair 0 and the antepalmate or 
hair 2) anterior to the palmate tuft, these hairs 
usually approximately equal in size and with four to 
nine branches ; fresh water form : crucians 
Abdominal segments 4 and 5 with but one conspicuous 
hair (antepalmate or hair 2) anterior to the palmate 
tuft, this hair may be single or with two or three 
branches _ n _:— 3 
3. Abdomen with the palmate tufts on segments 3 to 7 
inclusive, of similar form but those on segments 3 and 
7 distinctly smaller than the others ; posterior clypeal 
hairs (Fig. 10) long and usually single; tubercles of 
inner anterior clypeal hairs (Fig. 10) wide or close; 
brackish water form : crucians 
Abdomen with the palmate tufts on segment 3 approxi- 
mately equal in size to those on the succeeding seg- 
ments 4 
