new Neotropical Geometridae. 235 



apical cloud (opaque and distinct when the insect is held 

 against the light), its proximal margin running from two- 

 thirds costa a little oblique and irregularly to M 1 , where the 

 blotch abruptly terminates ; spots of the ground-colour 

 reappearing on costa just before apex and on termen (lunu- 

 late-margined) from R 1 to R 3 ; transverse lines obsolete. 

 Hind wing from base to near distal margin reddish grey ; a 

 large, ill-defined purple-grey patch (or broad band) from 

 inner margin (occupying slightly more than its middle one- 

 third), narrowing somewhat, and becoming obsolescent before 

 costa; faint traces of a second, narrower grey band from 

 inner margin to the tooth at end of R 1 , separating off a 

 narrow green terminal area; apical margin, from to R 1 , 

 also narrowly green ; a very indistinct cell-spot. Underside 

 similar, but with the markings still fainter ; the apical cloud 

 of fore wing and the median area of hind wing grey, not 

 yellow as in H. popayana?-ia, Dogn. Anu. Soc. Ent. Belg. 

 xlv. p. 310. 



Huancabamba, Cerro del Pasco, E. Peru. 



Very near to H. popayanaj'ia, Dogn., but with a more 

 definite apical blotch, and with the markings on the under- 

 side differently coloured. 



Prohydata prujiciens, sp. n. 



<J . 25-28 mm. — Face pale ochreous, slightly deeper 

 coloured above. Vertex white. Palpus ochreous, paler 

 beneath, terminal joint pale. Antenna whitish ochreous, 

 the shaft in part white. Fore wing with costa narrowly 

 ochreous, otherwise pale translucent green, feebly marked 

 with leaden grey, the markings consisting of: a basal patch, 

 extending along inner margin to at least one-third, its 

 anterior edge quitting costa at extreme base and irregularly 

 oblique to inner margin ; antemedian and postmedian lines 

 scarcely visible except at inner margin, where they form 

 diffuse grey spots with a tendency to coalesce ; the ante- 

 median from about one- third costa, apparently nearly straight ; 

 the postmedian from about two-thirds costa, strongly repan- 

 date after M 2 , reaching inner margin near the antemedian ; 

 an elongate discal spot ; a cloud from apex to M 1 , its proximal 

 edge from SC 4 at about 4 mm. before apex nearly parallel 

 with termen (weakly concave) as far as R 3 , thence turning 

 towards termen, but sinuous ; very faint traces of a line from 

 this cloud to inner margin, enlarged into a spot on submedian 

 fold ; the apical cloud encloses an elongate subterminal patch 



