12 PROCEEDINGS OF THE NATIONAL MUSEUM vol.78 



along the costa from apex of auxiliary vein to apex of fourth, nar- 

 rowed beyond apex of first vein and in apex of first posterior cell, 

 a short spur from the costal streak extending over inner cross vein, 

 and a narrow cloud on outer cross vein. 



Structurally similar to placida^ but larger, with the frons wider, 

 the antennae a little longer, the scutellum with a more numerous short 

 marginal bristles and hairs, and the aristae less evidently haired. 

 The hairs on the thoracic dorsum are numerous, decumbent, and 

 dark. In both species there is an indication of a weak apical central 

 emargination of the scutellum, but it is apparently not constant. 



Length, 10-11 mm. 



Type.—Q^i. No. 43076, U. S. N. M. Surigao, Mindanao, P. I., 

 one paratype in rather poor condition, Basilan Island (C. F. Baker). 



It must be noted that Walker's description does not fit the speci- 

 mens identified as flacida very well, but the specimens are of that 

 species according to Bezzi's identification and redescription. If he 

 is correct in his identification, then Walker's specimen must have been 

 teneral as the thoracic color is given as ferruginous while in the 

 specimens before me it is dark metallic green. The general color 

 of fulvescens is nearer to that given by Walker for j)lacida, but 

 there are differences which prohibit one from accepting it as his 

 species. Only a careful examination of the type specimen if it still 

 exists will definitely decide the matter of its identity. 



Genus PLAGIOSTENOPTERINA Hendel 



Plagiostenopterina Hendel, Abhand. k. k. Zool.-Bot. Geseilsch., Wien, vol. 8, 



1914, pp. 7, 52. 



This genus as accepted by Hendel contains species with very diverse 

 structural characters. In his key to the genera of " Stenopterinina " 

 he separates it from Stenoptera Macquart by the lack of frontoorbital 

 bristles, and the apically narrowed first posterior cell of the wing. 

 It falls in a section of his key along with Icteracantha Hendel and 

 Elassogaster Bigot, from the first of which it can be separated by the 

 unarmed femora, but it is difficult, or impossible, to readily separate 

 it from Elassogaster, the only character he cites for that purpose 

 being the oblique inner cross vein of the wing, Elassogaster having 

 that vein erect. This method of separation is quite unreliable, and 

 an examination of material available makes it evident to me that 

 there are other characters of more significance, and more readily 

 appreciable, available for group distinctions, but whether these are 

 of generic value is of course a matter of opinion. I consider the 

 segregates except Elassogaster as subgenera, and below I present a 

 synoptic key for their separation based upon the characters above 

 referred to. All of the included segregates will run down to Plagio- 

 stenoj^terina and Elassogaster in Hendel's generic key. 



