( 458 ) 



? Folia H. S., Aii^s. Schm., fig. 485. 

 Apicia Wlk., xx., p. 111. 

 ?Crocopteryx Guen., Phal., i., y. 72. 

 Type : D. mMculata Stoll. 



I restrict Drepanodes to Guenee's first group, viz., those in wliich the J i have 

 simply imbescent antennae. 



Syssaura Hub. 



Syssaura Hiib., Zutr., ii., p. 13, figs. 247, 248. 

 Drepanodes Guen., Phnl., i., p. 66, group ii. 



Wlk., XX., p. 69 (part). 



Druce, Biol. Centr. Am. Lep. Net., ii., p. 29 (luirt). 

 Microsema H. S., Auss. Schm., i)p. 64, 83, fig. 482. 

 Drepana Wlk., vii., p. 1761. 

 IIypei~ythra Wlk., xx., p. 125. 

 Hyposidru Butler, Fr. Z. S., 1878, p. 492. 

 Type : Syssaura drepanula Hiib. 



Distinguished by the elongated, very fak-ate forewings, and the short straight 

 pectinations of the cJ antennae. 



Halesa Wlk. (.x.x., p. 211), 



? Falcinodes Guen., Fhid., ii., p. 30. 



Faleinodes Suell., Tijd. v. Ent., 1874, p. 61. 



„ Druce, Biol. Centr. Am. Lep. llet., ii., p. 32. 



Walker says of Halesa : " Exterior border of forewings broadly excavated on each 

 side of the middle, where it is slightly angular ; exterior border of hindwings slightly 

 .scalloped and dentated." Of Falcinodes Guenee says, " Wings entire. Hindwings 

 rounded, with the anal angle slightly produced, but without excavations. Inde- 

 ])en(lent of the forewings attached to the subcostal." Snellen, in giving the neuration 

 of his gonodmiiari (I- , says of forewings, "five from centre of the discocellular, 6—10 

 stalked." For the present, not having seen corvinaria Guen., I prefer to keep 

 Falcinodes Guen. and Halesa Wlk. distinct, being of opinion that the former genus 

 does not truly belong to the Geometridae. 



Merocausta gen. nov. 



Forewings rather short ; costa faintly curved ; ai)ex blunt ; hiudmargin obliipie, 

 faintly arched. Hindwings broad, with well rounded hiudmargin. i antennae strongly 

 liectinated, the pectinations being themselves finely pubescent ; j)alpi short, upturned, 

 third joint minute ; tongue ]iresent. Hind tibiae of 6 fiattened and thickened, with 

 two pairs of spurs, the second pair (piite short. Neuration normal; scaling smooth 

 and fine; markings consisting of two irregular transverse lines enclosing a slightly 

 darker central area. 



Tvpf : Merocausta dfina sp. nov. 



From the markings and coloration of the underside the genus appear to be akin 

 to Pyrinia Hiib., from which it is separated by the different shape of the wings, and 

 by the antennae. Druce's Oynopteryx raynea, though twice the size of .1/. el.fina, 

 evidently belongs here, and possibly his Apicia alia. 



