260 Bulletin American Museum of A'atural Histori/ [Vol. XLIII 



mens of the species, representing both sexes, some pairs taken in copula, 

 and a quite considerable series of females from the Ogove and southern 

 Cameroon, which conform absolutely to the description of argijrostida 

 given by Ploetz. I am now convinced that I was in error in 189(3 in 

 regarding C. (Apaustus) argyrostida as the female of the succeeding 

 species, C. flava Hewitson = C chnn'ta fPloetz). 



(475) 3. Ceratrichia flava Hewitson 



Ceratrichia flava Hewitson, 1878, Ann. Mag. Nat. Hist., (5) I, p. 343. Holland, 



1896, Proc. Zool. See. London, p. 79, PI. in, fig. 14. 

 Plastingia charita Plcetz, 1879, Stett. Ent. Zeit., XL, p. 356. 



One male taken at Batama, September 18, 1909. 



(476) 4. Ceratrichia woUastoni Heron 



Ceratrichia wollastoni Heron, 1909, Trans. Zool. Soc. London, XIX, p. 174, PI. v, 

 figs. 13, 14. 



There are three specimens referable to this species which were 

 taken at Medje, two in April, and one in September 1910. It is distin- 

 guished from C. flava Hewitson l)y the outline of the inner edge of the 

 terminal black band of the primaries, which curves regularly from the 

 inner margin before the lower angle to about the middle of the costa, 

 whereas in C. flava it is angulated at vein 4, running inwardly for some 

 distance along that vein towards the cell, which in most specimens it 

 reaches and the outer extremity of which it covers somewhat diffusel}'. 

 The insect was originally described from Ruwenzori; we also have speci- 

 mens from the interior of Cameroon. 



Before dismissing the consideration of the few species of this genus 

 brought before us by the present collection, it is proper to state that it 

 seems to the writer that it is much in need of a careful revision, inasmuch 

 as the material constantly accumulating in his custody seems to indi- 

 cate that some at least of the so-called species are of questionable 

 vahdity. 



AcROMEcis Mabille 



Mabille, in the ' Genera Insectorum, ' separates the species named 

 neander Ploetz from the genus Andronymus Holland, to which I assigned 

 it in 1896, and erects the genus Acromecif-' for its reception. 



(477) 1. Acromecis neander (Ploetz) 

 Apaustus neander Plcetz, 1884, Stett. Ent. Zeit., XLV, p. 154. 

 Ancyloxypha producta Trimen, 1889, S. Afr. Butt., IH, p. 334. 



Andronymus neander Holland, 1896, Proc. Zool. Soc. London, p. 82, PI. ii, fig. 23. 

 Acromecis neander Mabille. 1904, Gen. Ins., XVII, p. 172. 



