NO. 1866. NEW SAWFLIE8 IN U. 8. NATIONAL MUSEUM— ROHWER. 399 



Female. — Length, 7 mm. Labrum rounded on the anterior mar- 

 gm; cl3^peus emarginate, with a small inner tooth, a poorl}^ defined 

 carina, the surface coarsely granular, antennal fovea large, extending 

 much above the insertion of the antennae; a low hump between the 

 antennae; middle fovea small, well defined; antennal furrows nearly- 

 complete ; V-shaped depressions below and above the anterior ocellus ; 

 postocellar line present; the area near the top of the inner orbits 

 somewhat depressed; head rather coarsely granular below the 

 supraorbital line, shining above it; antennae very like maculata; 

 dorsulum shining; stigma broadest at the base, tapering to the apex; 

 first transverse cubitus wanting; sheath robust, truncate; saw dark, 

 with strong, sharp teeth pointing toward the base near the apex, the 

 base without teeth, the upper part not dentate, rather irregular. 

 Black; labrum, apical palpi joints; four anterior legs below femora 

 and the trochanters, basal half of posterior tibijB and post-basitarsis, 

 yello wish- white ; the usual abdominal spots greenish- white ; mngs 

 clear hyaline, venation black; eyes in life dark-iridescent green. 



Plummer's Island, Potomac Kiver, Maryland. One female col- 

 lected by E. A. Schwarz. 



Type.—Csit. No. 14012, U.S.N.M. 



Genus AMETASTEGIA A. Costa. 



Taxonus (subgenus) Rohwek, Proc. U. S. Nat. Mus., vol. 39, No. 1777, 1910, 



p. 111. 

 Aomodycliuni Ashmead, Can. Ent., vol. 30, 1898, p. 309. 

 Taxonus (Mac Gillivray) Viereck, New Jersey State Mus., (1909) 1910, p. 582 



(part). 



The incorrect remarks about the type of the genus Taxonus ^ 

 when corrected does not make Ametastegia a synonym of Taxonus, 

 but leaves it the first name available for the subgenus Taxonus as 

 defined by Rohwer.^ The genus Aomodyctium Ashmead was founded 

 on a male of Strongylogaster ahnormis Provancher, which belongs to 

 Ametastegia. Aomodyctium Afhmead is, therefore, a synonym of the 

 older genus Ametastegia A. Costa. The hind basitarsis is shorter 

 than the following joints. Those who hold that a genus is without 

 standing until it has a species placed in it will accredit the genus 

 Aomodyctium to the present paper. 



EMPHYTINA, new subgenus. 



Genotype. — EmpTiytina pulchella Rohwer. 



Separated from Ametastegia Costa (s. s.) by somewhat different 

 habitus and loss of the first transverse cubitus. The species belong- 



1 See Proc. U. S. Nat. Mus., vol. 39, No. 1777, p. Ill; Bull. Tech. Ser. No. 20, pt. 2, U. S. Dep. Agr., Bur. 

 Ent., 1911, p. 90. 



2 Proc. U. S. Nat. Mus., vol. 39, 1910, p. 111. 



