122 NORTH AMERICAN NYSSONIDAE (hYMENOPTERa) 



Claremont, two males, (C. F. Baker), [Pomona College and Cor- 

 nell University]; "Cala." and "So. Cal," two females, [American 

 Entomological Society]. 



T^ypp.s.—Holotype, 9, Brawley, California, August, 9, 1914, 

 Cornell University no. 14G.1; allotype, &, Brawley, California, 

 August 9, 1914, no. 146.2; paratopotypes, no. 146.3, 146.4, Brawley, 

 California, August 9, 1914; paratypes, no. 146.5, Claremont, 

 California, (Baker), one in collection of Pomona College and two 

 females in collection of The American Entomological Society. 



The two last mentioned females are darker, more like the 

 males. 



I think that there is little doubt but that this species is Gorytes 

 eximius of Provancher (/iec Smith 1862). Fox includes exiniius 

 in his key l)ut does not mention it further. Handlirsch calls it 

 unrecognizal)le even to genus. As the name exhnhis is pre- 

 occupied and would have to be changed anyhow, I have thought 

 it better to I'cdescribe the specimens before me as new, with th(^ 

 types more accessible, and eximius can take its place as a synonym, 

 unless an examination of the type proves it different. 



NYSSON 



Key to the North American Species of the Subgenus Brachystegus'^ 



1. Scutelluin with a prominent reflexed margin (7) 



Scutelluni not margined, or at least the margin not reflexed (2) 



2. Posterior surface of ])ro])0(leum with strongly developed oarinae and 



usually more or less coarsely areolated; abdomen black, or at most with 



a red spot at base (3) 



Posterior surface of ])ropodeum with two very feeble carinae or none at 

 all, surface not areolated; abdomen mostly red, the apex black (6) 



3. Base of projxxlcum with a series of slightly radiating carinae (4) 



Base of propodeum with a network of coarse meshes, of which the two or 



three in the middle are the largest, the lateral ones irregular (5) 



4. Scutellum polished and shining, beset with coarse punctures; disc of first 



dorsal segment with moderately deep and conspicuous punctures; last 

 segment of the male anfeiuiae ol)li(iuoly truiir-uto. 



albomarginatus Cresson 

 Scutellum longitudinally rugulose; disc of first segment with small, shallow 

 and inc(jnspicuous ])unctures; last segment of male antennae acute. 



gagates new sjjecies 



'■' ('Inrcovis Viereck is omitted from this table. Two species of Nysson, 

 inUrmi'diits Viereck and (tiircohalleatuN Caiii{>ron, may also belong in this 

 subgenus, but arc omil led from tlie table as their subgciicric position is not 

 evident. 



