12 PROCEEDINGS OF THE NATIONAL MUSEUM vol.74 



fuscous, tibiae triannulate with fuscous, most evident on hind pair. 

 Wings grayish hyaline. Kjiobs of halteres fuscous. 



Frons about twice as wide as long, raised behind and in front 

 centrally, all vertical bristles present but small; facial depression a 

 little below middle; arista with the basal portion about twice as 

 long as apical. Thorax and scutellum absolutely smooth, each with 

 some scattered microscopic hairs. Fifth abdominal sternite about 

 twice as wide as long. Wings normal. 



Length, 4.5 mm. 



Type. — Cat. No. 41086, U.S.N.M. Cuernos Mountains, Negros 

 fC. F.Baker). 



This is the darkest colored species now known to me. If nigrifacies 

 de Meijere belongs to this genus it may be distinguished from it by 

 the much smaller size, 2.5 mm. in length, and the dark steel-blue 

 coloj' of the frons. 



Subfamily Sapromyzinae 



Dr. F. Hendel has recently published a key to the genera of the 

 entire family exclusive of the Celyphinae,* and Dr. R. Frey has in 

 addition to this published a generic key to the species known to 

 him ^ so that it appears almost unnecessary to give a generic key in 

 this paper. There are however some differences of opinion as to the 

 validity of certain of the genera and some elucidation is required to 

 make matters clear to anyone intending to make a more intensive 

 study of the Philippine or Oriental fauna. 



Doctor Frey erected 6 new genera in his paper and so far as pos- 

 sible I have dealt with these in the text following. Certain of Doctor 

 Hendel's genera I can not accept, and one or two others are given a 

 different interpretation so that some notes at least are required to 

 explain these points. 



Genus STEGANOPSIS de Meijere 



This genus in the strict sense is confined to the Eastern Hemisphere. 

 There is a closely related form in the Americas and to make clear 

 the distinctions between the two segregates I include the latter in the 

 key given below. I incline to the opinion that Steganolauxama is 

 entitled to no more than subgeneric distinction. All species of the 

 genus known to me are included in the key. 



KEY TO THE SPECIES 



1. Anterior pair of orbital bristles directed baclcward ; frons uniformly shining; 

 face smooth and glossy, convex above middle (America). 



Subgenus Steganolauxania Frey, latipennis Coquillett. 



Anterior pair of orbital bristles directed inward ; frons not uniformly 



shining 2. 



* Bncycl. Entoinol., Dipteia, vol. 2, fasc. 3, 1925. 



» Acta Soc. Paun. Flor. Fennlca. vol. 66. No. 8, 1927. 



