GEOMETRIDAE. 



155 



long wings and long antenna, is an obvious Cleora of the Chogada group, 

 Warren's note on Cerotricka (Nov. ZooL, i, 377, 1894) was based on miscon- 

 ceptions, and must be ignored altogether. 



Aegitrichus (type A. lanaris Butler, 1886, Fiji) is still only known from the 

 much damaged <$ type, and no definite opinion as to it can yet be expressed ; 

 but from all the appearances I should suppose it to be a Cleora (Chogada) with 

 highly specialised hind wing, in which the posterior half is separated off into 

 an excessively hairy lobe ; all the other characters shown agree absolutely with 

 those of the present group. 



Of the four Geometrinae now known to occur in Samoa, two are " Chogada," 

 while the other two extend respectively the range of an Indo-Australian genus 

 (Nadagara), and that of a widely distributed Indo-Australian species (Orsonoba 

 clelia), both of which w x ere previously supposed to reach their eastern limit in 

 the Solomon Islands. 



Cleora Curtis. 



Brit. EM., ii, 88, 1825.— Turner, Proc. Linn. Soc. N. S. Wales, xlii, 370, 1917.— Ahis Curtis, Brit. 

 Era,, iii, 113, 1826.— Prout, Ann. Transv. Mus., iii, 222, 1913.— Chogada Moore, Lep. Ceyl, 

 iii, 415, 1887.— Selidosema (? Hiibner, Verz., 299, 1825) Meyrick, Tr. Ent. Soc. Lond., 1892, 

 105. — Boarmia part. (Treitschke, Schmett. Ew\, v, (2), 433, 1825) Hampson, Faun. Brit. 

 Ind., Moths, iii, 256, 1895. 



In my preliminary dealings with the world's Geometrinae — admittedly 

 one of the most difficult of all the Lepidopterous subfamilies — I have perforce 

 accepted in its broad outline Meyrick's conception of the nearly world-wide 

 " genus " which he called Selidosema, but for which Cleora * is probably a prior 

 and certainly a safer name, S. plum aria Schiffermiiller (the type of Selidosema) 

 differing in several particulars and being usually considered sui generis, as by 

 Lederer, Guenee, McDunnough and others. I am aware, however, that further 

 subdivision will sooner or later be necessary ; especially illuminating is 

 McDunnough's fine essay, " Studies in North American Cleorini " (1920), in 

 which he treats Hampson's Boarmia as a tribe, and differentiates no less than 

 twenty-three natural genera, according to characters derived from the genitalia, 



* Cleora Curtis, 1 Oct., 1825 ; Selidosema Hiibner, " late 1825 (post Aug.)," sec. Sherborn 

 and Prout, if not even 1826. 



