278 
Mr. Louis B. Prout on the 
(Haw.), or intermediate between that and E. e.riguata 
(Hiib.). In such a large and difficult genus, it is impossible 
to say positively tliat it has not been already described, but 
I have studied all Warren’s and Dognin’s types—which 
cover by far the greater pro])ortion of those de.scribed— 
without finding it, and think it therefore fairly safe to 
publish it as new. The specimen I have determined as 
truncatipennis, Warr., may be a malformed example of it, 
but each looks normal to its own shape. The type of 
argica is in good condition. 
128. Eupithecia ammorrhoa (Prout), nov. sp. 
(Plate XLVIII, fig. 12.) 
9 . 21 nun. Head, body and torewing light sandy-grey, irrorated 
with darker sandy-ochreous ; thorax and base of abdomen, as well 
as forewing, paler beneath. Antenna sandy, darker ringed. Wings 
long and narrow. Forewing crossed by several sandy-ochreons lines, 
the most distinct being : a curved antemedian from beyond two-fifths 
of costa to middle of inner mai’gin ; a postmedian from about two- 
thirds of costa, angled distad above (but here weak), distinct again, 
and parallel with termen, from R*, slightly inbent from R^ to kP ; 
and a finer line accompanying the postmedian distally at about 1 mm., 
following the same course, darkened from costa to the angulation on 
SC’, and crossed by a short blackish mark on M"; termen narrowly 
clouded with sandy-ochreous, more broadly at apex ; cell-spot black, 
distinct; costal area somewhat dotted and striated with fuscous; 
marginal line blackish, interrupted at vein-ends ; fringe at base 
narrowly white, then with a bar of light fuscous, then again light, 
though somewhat mixed with pale fuscous. Hindwing whitish, 
with a dark line almost parallel with and near to termen, distinct 
from inner margin, but becoming faint before one-half and dis¬ 
appearing before costa ; the weak beginnings of other dark mark¬ 
ings from inner margin to M and LP, this area also somewhat less 
white than rest of wing and dotted with fuscous ; cell-spot minute ; 
marginal line and fringe as in forewing. Underside of forewing 
very weakly marked, excepting a moderately dark cell-spot (which 
is more elongate than above), and the fine line distally to the post¬ 
median, which is rather conspicuous in its darkened costal part, and 
well traceable across the wing ; underside of hindwing nearly white, 
almost unmarked, excepting a small cell-spot. 
San Juan, November 15, 1904 (W. M. Bayne), type in 
coll. L. B. Prout. 
