424 



vex, apex rounded, dorsal edge subangularly produced on apical half, 

 from near base a curved, flattened spine arises. 



Lengtii ;^./ nun. ; tegmcn 8.5 nun. 



Hah. Bartica, Britisli Guiana, :\ray, 1001. Described 

 from one male specimen. Type in coll. Prof. H. Osborn. 



71/. neonchaJosa sp. nov. 



(5 Similar to M. ucbiilosa as recognized above but the bands on teg- 

 mina fainter and narrower. Pygophor very short, edges entire ; anal seg- 

 ment subquadrate, about as long as -wide, sides very slightly convex, 

 apex truncate or slightly concave, anus near middle, a carina runs from 

 each side of anus to apical edge ; genital styles broadest at apex, ventral 

 edge slightly curved, apex slightly convex, dorso-apical corner angular, 

 ventro.apical corner round, dorsal edge concave, from the middle arises 

 a curved spine with a rounded apex. 



Length 3 nnu. ; tegmen damaged. 



Ilab. Bartica, British Guiana, 'Tuly, 1001. Described 

 from one male with damaged tegmina. Type in coll. Prof. 

 11. Osborn. 



M. ? sp. nov. 



2 I have one female specimen with immaculate tegmina with the 

 antennae longer than the face and the arista arising one-third from 

 apex; the genital styles (ovipositor sheath) are abortive but the ovi- 

 positor is well developed and exposed. I refrain from naming from only 

 a female. 



Ilab. Bartica, British Guiana, April, 1901. 



M. 



sp. nov, 



9 Orange-buff, veins of tegmina and wings slightly darker than mem- 

 brane, posterior margins of tegmina and wings bordered with fuscous. 

 Posterior edge of pregenital plate produced in middle into a quadrate 

 plate slightly longer than wide; styles small, covering ovipositor. 

 Length 3.4 mm. ; tegmen 7.8 mm. 



Ilab. Bartica, British Guiana, J\ray, 1001 {Coll. II. S. 

 Parish). I refrain from naming onlv a female. 



