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white scales, the hindmargiii to apex alone remaining black. Palpi with the basal 

 joint orange, the rest blackish externally, bluish white internally ; vertex, thorax, 

 and abdomen blackish, the abdomen more cinereous ; base of patagia orange ; a 

 white spot at base of antennal shaft ; abdomen beneath white. 



Expanse of wings : 30 mm. 



One c? from Chiriqui, Panama. There are traces of a line of yellow scales from 

 base below the costal edge of forewings, which appears thickened ; the antennae 

 are broken off. 



Subfamily GEOMETRINAE. 



Heterocrita gen. nov. 



Forewings : witli costa curved ; apex prominent : hindmargin obliquely curved, 

 subcrenulate, witli a shallow excision between veins 4 and 0. 



Iliiuhvings : with the excision more distinct, the teeth at veins 4 and 6 

 prominent. 



Palpi rather thick, shortly porrect, hairy, the terminal joint short and drooping. 

 Antennae thick, lamollate, with clavate teeth beneath ; hind-tibiae with terminal 

 spurs only ; tongue ill develojied ; frenulum very fine ; abdomen witli dorsal sjjots, 

 but without crests. 



Neuration : forewings, cell half as long as wing ; discocellnlar vertical above, 

 oblique below ; first median uervule at two-thirds, second at seven-eighths ; vein 5 

 from a little above centre of discocellnlar, 6 from upper angle of cell, 7, 8, 9, 10 

 stalked from angle ; 11 from cell, anastomosing with 12 and 10 with 11: hind- 

 wings, with 6, 7 stalked ; 3 from before end of cell. 



Type : Heterocrita araria Guen. (Racheospiki). 



The structure of the antennae separates this species from Racheospila ; and the 

 absence of abdominal crests from Lophocrita Warr., with which it otherwise agrees. 



Melochlora gen. nov. 



Allied to Dichorda Warr. and Tachjphyle Bntl., from both of which it is at 

 once separated by the wing outline. In both wings the hindmargin is angled at 

 vein 4, and in the forewings concave between the angle and apex. 



The antennae in the i are evenly pectinated. 



Type : Melochlora nets Drnce {TachyphyWi). 



31. Melochlora trimaculata sp. nov. 



Forewings : dnll grass-green ; the lines olive-green ; first very obscure, slightly 

 curved, at one-third ; second broad, nearly straight, distinct, from costa a little 

 before apex to two-thirds of inner margin ; this line is edged outwardly and the 

 first inwardly by a faintly lustrous bluish tint, which also suffuses the lower half 

 of the central area ; cell-spot brown ; fringe green. 



Hindwings : with a single central line, continuing the outer line of forewings, 

 and having a blackish spot below the costal edge ; a brown cell-spot ; three small 

 blackish blotches in an oblique line parallel to hindmargin below apex. 



Underside paler green ; forewing witli a dull blackish blotch along snbmedian 



