16 
Psyche 
[ March 
eluded because Walker’s illustration is somewhat decep- 
tive. The resemblance is obvious, but I have found the 
lateral ends bluntly pointed, not rounded, and the diagonal 
ridge which runs antero-laterally from the postero-mesal 
region is diagnostic. 
1 — Lamina more than half as wide as long 2 
— Lamina less than half as wide as long 3 
2(1) Lamina widest mesally, gradually narrowing laterally 
for two-thirds of length, rapidly narrowing in lateral 
one-third to form an antero-lateral blunt point, pos- 
tero-lateral edge not curled upward; dorsum of ab- 
dominal segment one entirely black, connected to an 
apical ring ebrium 
— Lamina widest about midway to lateral end, the pos- 
tero-lateral edge curled upward, often extremely so, 
a blunt point formed antero-laterally; dorsum of seg- 
ment one with a black basal spot and an apical spot 
on each side hageni 
3(1) Lamina with a mesal enclosed concavity formed by 
the high antero-mesal corner and the raised or thick- 
ened postero-mesal edge 4 
— No such concavity present; edges may be curled to 
form a shallow basin or cavity may be formed by 
anterior corner and be open posteriorly 8 
4(3) Postero-mesal margin of lamina tilted vernale 
— Postero-mesal margin of lamina not tilted, but may 
be thickened 5 
5(4) Lamina twisted so that entire lateral half is greatly 
tilted 6 
— Entire lateral half of lamina not up tilted ; antero- 
lateral margin may be raised 7 
6(5) Twisted lateral portion of lamina bent posteriorly; 
lamina well-demarcated from thorax by a posterior 
groove for its entire length; prothoracic pits ab- 
sent; segment one with dorsum entirely black, con- 
nected to apical ring; black of segment 8 not nar- 
rowed; black of segments 9 and 10 extending far 
later ad minuscidum 
