194 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.40. 



angularly produced into a flattened process where it joins the lateral 

 longitudinal carina, costulse poorly developed almost lost in part 

 among the sculpture, first abscissa of the discoidal vein as long as 

 the remaining abscissa combined, the side of the stigma adjoining 

 the disco-cubital cell almost half again as long as the side adjoining 

 the radial cell; spiracles of first tergal segment prominent, the same 

 segment with a distinct carina extending from the spiracles to the 

 apex of the segment. 



PHYGADEUON (DAICTES) FUKAII, new species. 



Female. — Length, 5.5 mm.; head black, dullish, indistinctly punc- 

 tured, scape and mandibles black, shining as is the clypeus, pedicel 

 blackish, first, second, and third joints of the flagel brownish, remain- 

 ing flagellar joints black or blackish, lateral ocellus a little nearer the 

 anterior ocellus than to the eye margin, palpi stramineous, infuscated; 

 thorax black and shining, indistinctly punctured, tegula) brownish, 

 wings suffused with browmish, veins dark brown, stigma dark brown 

 except at base, where it is yellowish, fore wings yellow at base, legs 

 mostly reddish brown, coxas black, tibiae and tarsi stramineous, 

 infuscated, proximal trochanters more or less blackish, distal trochan- 

 ters more or less concolorous with femora; propodeum black, shining, 

 indistinctly punctured, the fused angular area and third lateral area 

 rugose; first tergal segment black and polished, the dilated portion 

 finely aciculated, second and third tergal segments reddish, polished, 

 more or less indistinctly sculptured, remaining tergal segments black, 

 polished, almost sculptureless, sheaths of the ovipositor blackish, 

 about as long as the first tergal segment. 



7^.— Cat. No. 13498, U.S.N.M. 



Type-locality.— Konosu, Saitama, Japan. 



T. Fukai, collector. 



Named for Mr. T.Fukai. 



Genus MASTRUS Foerster. 



-The species to be described below is evidently a Phygadeuonine 

 with an incomplete areolet. . In Fperster's classification this would go 

 to Leptodemas on condition that the areolet be, ignored. Now the 

 genotype of Leptodemas would appear to be L. cariniscutis Cameron. as 

 that is the first species tq be included under Leptpdemas to the knowl- 

 edge of the writer. Accordingly the description of Leptodemas 

 Foerster is. amplified through Cameron's description of Leptodemas 

 cariniscutis Cameron. As the Leptodemas Foerster, Cameron has 

 the scutel carinate laterally on the basal half and the wings with, .a 

 complete areolet, which is not the case in the following species, it is 

 deemed Imwise to call it a Leptodemas Foerster, Cameron. In 



