10 PROCEEDINGS OF THE NATIONAL, MUSEUM. vol.64. 



In Rohwer's key ^ to North American species runs best to couplet 7, 

 where it differs from aethiops Cresson in its short ovipositor and 

 impunctate second and third tergites and from atripes Rohwer female 

 in its black abdomen and short ovipositor. From aethiops, to which 

 its black abdomen most closely allies it, it differs further in having 

 the head wider behind the eyes and the temples not evenly convex as 

 in aethiops, but much more strongly so posteriorly than immediately 

 behind the eyes ; also in having the front legs with a distinctly reddish 

 tinge. 



Mouth much wider than face; eyes strongly convergent below, 

 small, twice as long as wide ; face, cheeks, and lower temples coarsely 

 and sparsely punctate, upper temples, vertex and frons polished and 

 practically impunctate; ocellar triangle hardly broader than length 

 of ocell-ocular line. Thorax polished, sparsely punctate, the punc- 

 tures coarsest and densest in middle of mesoscutum and scutellum; 

 propodeum completely areolated, but costellae and median carinae 

 weak, hind angles dentate ; hind femur stout, its thickness at apex of 

 tooth about half its length. First tergite about twice as long as 

 broad at apex, coriaceous, carinae obsolete; abdomen otherwise pol- 

 ished, unsculptured, second tergite about as long as broad at base; 

 ovipositor as long as abdomen and half of thorax, the sheath broad- 

 ened in its apical half. 



Entirely black except that front and middle legs, palpi, and man- 

 dibles are more or less reddish; wings fusco-hyaline, venation black. 



Type locality. — Robben Island, Okhotsk Sea. 



Type.— Cat. No. 25920, U.S.N.M. 



One female taken by Leonhard Stejneger on August 17, 1922. 



TRIBE PHYTODIETINI. 

 PHYTODIETUS PULCHERRIMUS (Cresson). 



This species differs from all of the other North American species 

 with maculated propodeum in that the propodeum lacks all trace of 

 a median longitudinal impression and the yellow spot instead of 

 being divided or medially emarginate in front projects roundly 

 toward the base; also the antennae are ferruginous with base and 

 apex black, more contractingly so in the male. 



The female has not been described. There is in the National 

 Collection a female from Georgetown, District of Columbia, H. H. 

 Smith, collector, that I take to be of this species. It runs in 

 Eohwer's* key to species to couplet 8, where in its uniformly 

 ferruginous hind femora it agrees with distinctus Cresson, but it has 

 a large precoxal white spot on mesopleurum and a smaller one at the 



'Proc. U. S. Nat. Mus., vol. 57, 1920, p. 455. Mdem, p. 461. 



