DESCRIPTIONS OF NEW SPECIES OF HYMENOPTERA. 



By S. A. RoHWER, 



Of the Bureau of Entomology, United States Department of Agriculture. 



The foUowing paper, which is a contribution from the Branch 

 of Forest Insects, Bureau of Entomology, contains the descriptions of 

 forty-seven new species of Hymenoptera, and notes on certain other 

 species and genera. Many of the species are of economic importance 

 in regard to the forest trees, some of them being important parasites, 

 others of them, defohators. In the preparation of these descrip- 

 tions the Zeiss binocular microscope was used with the magnification 

 varying from 27 to 35 diameters. 



The types of all the new species are in the United States National 

 Museum. 



Famdy TENTHREDINIDAE. 



Genus EMPHYTINA Roh^A^er. 

 EMPHYTINA VANDUZEEI, new species. 



This species is readily differentiated from all the North American 

 species by being entirely black. In the key to the Nearctic species * 

 this will fall in with inornatus and canadensis, but the black legs, 

 black pronotum, and black mesepisternum readily separate it from 

 those species. 



Female. — Length 6.5 mm. Apical margin of the clypeus depressed, 

 deeply, subangulately emarginate, lobes broad, triangular in out- 

 line; basal portion of the clypeus convex; supraclypeal area strongly 

 uniformly convex; supraclypeal foveae deep, not sharply differ- 

 entiated from the ventral production of the antennal foveae; 

 middle fovea shallow, circular in outline; pentagonal area with, 

 sloping walls which unite on the postocellar line; postceUar furrow 

 rather well-defined; postocellar area well defined laterally, convex, 

 indistinctly parted by a median furrow, shining, about twice as wide 

 as the cephalcaudad length; postoceUar line slightly shorter than the 

 ocellocular line; antennae short, filiform; flagellum hairy, first joint 

 distinctly but not much longer than the second; head except the 

 postoceUar area strongly opaque, with fine reticulations on a granular 



I Proc. U. S. Nat. Mus., vol. 41, 1911, p. 399. 



Proceedings U. S. National Museum, Vol. 49— No. 2105. 



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