308 Bvlletin American Museum of Xnlural Hutorij [Vol. XLIII 



white save near the u|)])er angle, where it is broadly shaded with blackish. There is 

 an extremely minute black point near the end of the cell in the hind wing, and a very 

 faint transverse postmedian line, composed of minute transverse striae. The wings on 

 the under side arc marked exactly as on the upper side, except that the dark outer 

 spots are much paler and the striae on the costa of the fore wing near the base some- 

 what more i)ronounced than on the upper side. Expanse, 38 mm. 



The type, which is unique, was taken at Medje on July 8, 1910. 

 The insect closely resembles in its markings some species of the rhopalo- 

 cerous genus Pien's. Its reference to the genus Rhamidava is purely 

 piovisional, as the specimen, aside from the wings, is in too poor condi- 

 tion to enable an exact diagnosis to be made, the legs being missing and 

 there being onh' a fragment of one antenna, which shows that the an- 

 tenna- are simple. I hesitated to descril^e this insect because of the 

 imperfect condition of the type but, after examining all of the litera- 

 ture, I have failed to recognize any description of an African geometrid 

 which seems to correspond with it. The type is in The American 

 Museum of Natural History. 



Melinoessa^ Herrich-Schaeffer 



(651) 1. Melinoessa croesaria Herrich-Schaeffer 



Melinoessa croesaria HKRRiCH-iScH.EFFER, 1855, Aussereur. Schmett., PI. lxv, 

 fig. 370. SwiNHOE, 1904, Trans. Ent. Soc. London, p. 499. 



One badly damaged specimen taken at Medje, August 12, 1910. 



(652) 2. Melinoessa (?) species 



A damaged specimen from Medje, taken in September 1919, be- 

 longs without much doubt to this genus, and seems to be nondescript, 

 but I hesitate to name it. 



Semiothisa Hiibner 



(653) 1. Semiothisa species (?) 



There is a single specimen taken at Medje, July 29, 1910, which 

 belongs to this genus but which I am unable to refer to any species 

 known to me either by the figures or descriptions which have been given. 

 As most of the verljal descriptions are, however, very unsatisfactory, 

 and often leave the student in doubt, I hesitate to name the insect as 

 new, fearing by so doing to perpetrate a synonym. 



■Swinhoe, loc. ci7., sinks Obruisa rn/fnata Saalniuller as a synonym of Melinoessa stellata Butler, 

 which I think is an error. The two insects resemble each other verv closely in the stvle of marking, 

 but the form of the wings is very different. 



