374 NOVITATES ZOOLOGICAE XXIV. 1917. 



NEW SOUTH AMERICAN GEOMETRIDAE. 

 By LbUIS B. PROUT, F.E.S. 

 SUBFAM. OENOCHROMINAE. 



1. Ergavia burro wsi spec. nov. 



(J, 44-49 mm. Head olive-buff, the face irrorated with red * and black ; 

 palpus black. Antenna dentate, the teeth at longest scarcely one-half the 

 diameter of the shaft ; cihation and single bristles normal. Thorax and abdomen 

 above olive-buff, the thorax in front strongly mixed \\ith red, and shghtly irith 

 black, the abdomen weakly tinged with red on posterior half of the segments 

 and with diminutive red-and-black crests. Hindtibia with a single spur. 



Foreicing olive-butt', in places with shght dark irroration ; a weak, very 

 ill-defined reddish shade in the middle (about from R' to BP in their proximal 

 half), traceable still more faintly to hindmargin ; basal raised tuft fairly strong, 

 red mixed with black ; discal tuft strong but not very wide, predominantly 

 black ; three red, in places black-mixed, costal patches, the basal about 5 mm. 

 long, the central bounded proximally by the antemedian hne, distally by the 

 postmedian, posteriorly by M, the third subapical, reaching SC ; some similarly 

 coloured costal strigulation and irroration between the median and postmedian 

 and beyond the distal patch ; hnes chieflj' expressed by dark costal spots, the 

 median spot rather elongate, a little beyond the cell-patch (generally nearer 

 to the postmedian than to the antemedian), obUque inward ; antemedian Hne 

 somewhat excurved in anterior half of wing, marked by a dark dot or minute 

 dash on M, then incurved but almost obsolete, except for dots on fold and 

 SM' ; median obsolete ; postmedian exceedingly weak, sometimes obsolete, 

 its course always indicated by small or minute vein-dots ; extremely oblique out- 

 ward to R', where it is 3-4 mm, from termen, incurved between radials, oblique 

 inward to about three-fifths hindmargin, the dots on R', M', SJP, and hind- 

 margin nearly in ahgnment, an inward curve between M' and SM' ; subterminal 

 line faintly paler, scarcely traceable except between radials and near tornus, 

 where it crosses ill-defined reddish patches ; termen with strong black dots ; 

 fringe traversed by some reddish motthng which suggests a thick, irregular Une. 



Hirulwing with tennen moderately strongly dentate, the tooth at R' 



scarcely appreciable except in the fringe ; ohve-buff, the proximal half strongly, 

 a band proximal to the subterminal more feeblj', shaded with red and with 

 some blackish strigulation or irroration ; cell-mark white, rarely conspicuous ; 

 a rather strong, thick, wavy black line just beyond, from R' to hindmargin and 

 indicated on midcosta by a blackish spot ; a less definite red , black -mixed line 

 r5 mm. beyond and parallel with the preceding, expanding into more rust- 

 coloured spots between R' and R' and especially between R' and R' ; post- 

 median line fine, blackish, marked with very strong black teeth on the veins, 

 that on R= generally elongate ; a very fine pale distal edging to thi.s line ; termen 

 with black dots. 



* None of the markings described as " rcxl " are very bright — scarcely more than " liver- 

 brown." 



