FAM. GEOMETRID/E 193 
Femora glabrous. Hindtibia in cf not dilated, in both sexes with four rather approximated spurs. 
Abdomen often with small crests. Frenulum in cf arising from before basal expansion, in OQ wanting. 
Forewing with costa slightly arched, apex moderate, termen oblique, little curved, cell not quite one- 
half, DC? oblique posteriorly, SC! from cell or stalked, usually anastomosing with C, SC? normal, very 
rarely anastomosing. with SC!, R! usually approximated, occasionally connate or minutely stalked, 
R* from well above middle, M! separate, connate or short-stalked; hindwing with termen rounded, or 
excised between R! and R? (in lunatimargo angled at R? only), tornus moderate, cell not quite one-half, 
DC? oblique posteriorly, C anastomosing with cell at a point near base (except Section III), SC? stalked, 
M! connate, approximated or short-stalked (in Section III well separate). 
Early stages unknown. 
Nearly akin to Omf/ax, differing chiefly in the pectinate Q antenna, 
Type of the genus : Heterorachis devocata (Walker) — Geometra devocata, Walker (1898). 
Geographical distribution of species. — ZEthiopian. 
SECTION I, — Forewing with SC! from cell, hindwing with termen rounded ; 
antennal pectinations moderately long. 
I. H. devocata (Walker). S. Africa. 
Geomelra devocata, Walker, List Lep. Ins. Brit. Mus. Vol. 22, p. 514 (1861). 
Heterorachis devocata, Warren, Novit. Zool. Vol. 5, p- 235 (1898). 
2. H. diaphana (Warren). Madagascar. 
Prasinocyma diaphana, Warren, Novit. Zool. Vol. 6, P- 291 (1889). i 
3. H. asyllaria (Swinhoe). Madagascar, 
Prasinocyma asyllaria, Swinhoe, Trans. Ent. Soc. Lond. p- 545 (1904). 
SECTION II. — Forewing with SC! stalked; hindwing angled at R?; 
antennal pectinations short (huj. gen.?). 
4. H. malachitica (Saalmüller) (hic ponenda ?). Madagascar. 
Phorodesma malachitica, Saalmüller, Ber. Senckenb. Nat. Ges. 1879-80, 
P- 291 (1880). 
Racheospila malachitica, Saalmüller, Lep. Madag. (2), p. 496, t. 14, f. 270 
(1891). 
Heterorachis (?) malachitica, Warren, Novit. Zool. Vol. 5, p. 235 (1898). 
5. H. lunatimargo (Prout). W. Africa. 
Antharmostes (?) lunatimargo, Prout, The Entomologist, Vol. 44, p. 28 (1911). 
SECTION III. — Forewing with SC! from cell; hindwing excised between R! and R?; 
antennal pectinations long; hindwing with C approximated to cell for a short distance 
(huj. gen. ??) 1). 
6. H. triangularia (Swinhoe) 2). Madagascar. 
Phorodesma triangularia, Swinhoe, Trans. Ent. Soc. Lond. p- 551 (1904). 
1) Affinities quite uncertain. From the facies and texture it might possibly be assumed that the species here placed has more connection with 
the BafAyco/podes-group. 
2) Phorodesma triaugularis on type label, 
