198 Annals of the Carnegie Museum. 



is nearly horizontal, slightly contracted at mid-length, gradually 

 thickened to the apex, which is a little thicker than the base and 

 truncated from above downward (ventrad) and backward (caudad), 

 but not so obliquely as to produce an acute apex. 



Inferior appendages in profile view conical, directed slightly upward 

 and reaching to mid-length of the superiors ; in ventral view each 

 appendage, otherwise pale yellow, has an inner acute apical straight 

 black edge. 



Postnodals on the front wings 12, on the hind 11 ; M 2 (= nodal 

 sector) arising nearest the sixth postnodal on both front and hind. 



Abdomen 38.5, hind wing 22 mm. 



Habitat : — Brazil, Bahia, 1 d\ Museum of Comparative Zoology, 

 Cambridge, Mass. 



See also the remarks under M. bicornis. 



103. Metaleptobasis bicornis? 



(Plate VI, figs. 108, 109.) 

 Leptobasis bicornis Selys, Bull. Acad. Belg. (2) xliii, p. 103. 1877. 



This species was described from a single female. A male which I 

 provisionally refer here lacks the last four abdominal segments and 

 differs from the description of the female as follows : 



Hind margin of prothorax low, very feebly trilobed, lobes subequal. 

 Each mesepisternum bears a slender straight horn directed laterad and 

 hardly at all cephalad or dorsad, thus differing from the similar proc- 

 esses of M. dicer as and of M. bovilla 25 from Nicaragua, as in M. die eras 

 each horn is directed laterad, dorsad, and cephalad, the last more 

 especially in its distal half, and in M. bovilla each process is " directed 

 forward [cephalad] and upward [dorsad] . . . subparallel with its 

 fellow of the other side for half its length, then diverging therefrom 

 and curved outward (laterad)." 



Mid-dorsal thoracic band of the same width (.32 mm.) as in M. 

 diceras $ above described, but metallic-green instead of metallic-blue. 



Quadrilateral on the front wings with the anterior side two-fifths as 

 long as the posterior, (not two-thirds as de Selys says, but a comparison 

 of his statement for the same parts on the hind wing suggests that this 

 may be an error), 11 postnodals on all the wings, M a arising nearest 

 the sixth on the front wings, the fifth on the hind. 



25 Calvert, Biol. Centr.-Amer. Neuropt., p. 386, pi. vii, figs. 21-23. 1907. 



