March. I9-M.I MacGiI.I.IVRAY : XkW SpKCIKS OF N'kMATI NAK. 27 



The sins:Ie species descrihod helow, which is the genotype, has 

 someuliat the form and aspect of Dibolia or Psylliodcs. Rv Horn's 

 tal)le"' it would run to his group Systex.^. hut it is very different 

 in form, length of ahdominal segments, etc., from any mcmhcr of the 

 genus Systciia. 



Tanygaster ovalis new species. 



Klongate-ov al, rather strongly convex. Black, shininK ; four outer joints 

 of antennae fuscous, all the femora fusco-piccous ; remainder of antennz, 

 tibia and tarsi dull yellow. Head with a few small punctures between the 

 eyes. Thorax one-half wider than long, its sides regularly curved and rounded 

 into base; front angles each with a small oblique nodular prominence; disk 

 finely alutaceous. evenly, sparsely, rather lincly and shallowly punctate. Elytra 

 elonjjate-ova!. their sides feebly curved from base to middle, thence nearly 

 straight and evidently converging to apical fifth, then rounded into tips, the 

 sutural angle of each distinct ; disk rather finely, densely and very confusedly 

 punctate. Abdomen and hind femora minutely and sparsely punctate, each 

 puncture bearing a very fine prostrate h^ir. Last ventral of male with a 

 median oblong elevated area which is broadly emarginate behind ; of female 

 with a deep median lengthwise groove which is widened posteriorly. Other 

 characters as given under the generic heading. Length, 2.1-2.3 mm. 



Two specimens taken singly in Marion County. June 6. 1912, and 

 May 5. 1918, l)y sweeping in low moist grounds along the hase of a 

 wooded ridge, from which many sjjrings emerge to flow into White 

 River. 



NEW SPECIES OF NEMATINAE— (HYMENOPTERA.) 

 By Alex. D. MacGili-Ivray, 



L'kb.ana. Il.I.. 



The adults of the following new s|)ecies are the result of an ex- 

 tended series of collecting and hrceding of saw-fly larvie hy Dr. H. 

 ^'uasa at Ithaca. New York and I)y the Maine Agricultural ICxperi- 

 ment Station at Orono. Maine. The descriptions of the adults are 

 l)ul)lished at this time in order that the names can he used with 

 descriptions of the larv.-e. 



Amauronematus vanus new species. 



FciiKili-. — Body black with the following parts yellowish white : head except 

 postocellar area, extending onto occiput and ocellar basin in part, antcnnc for 



'"Trans. .Anur. Knt. Soc. X\'I. 1889, 167. 



