NORTH AMERICAN HYMENOPTERA. 85 



sometimes tlie mid file and hind i)airs darker; abdomen genernlly 4, sometimes 

 6 or 8 spotted ; a single specimen from Illinois has the abdomen entirely black. 

 Length 9 ' 4-6 mm. ; %, 3.5-5.5 mm. 



United States. Forty-nine males and thirty-five females (coll. 

 Am. Ent. ISoc. and C. R.). 



Specimens from Montana show the richest livery. All of the 

 ornaments are present and most widely expanded, 



I have taken this species from June 6th to August 15th on flowers 

 of Eulophus, Pastinaca, Cicuta and Slum. 



14. O.'vybeluj* Forbesii n. sp. 



% . — Very finely and densely punctured and roughened. Face long, fiat; 

 <!lypeus produced; vertex with an angular protuberance ou each side behind 

 summit of eyes; prothorax not cariuate nor angular on sides, finely punctured ; 

 scutellum semicircular, more coarsely and sparsely punctured, not cariuate; 

 IKistscutellum triangular, finely roughened, not carinate; squama forming a 

 linear membranous border ou the postscutellum, little wider behind and termi- 

 nating obtusely on side of spine. Spine very short, its tip only rising a little 

 aljove level of postscutellum ; base of metathorax finely roughened with few 

 radiating lines; hinder plate finely roughened, below spine with an ovate de- 

 pression, which is smooth and shining. Abdomen without lateral spines, elon- 

 gated, sides nearly parallel, apex rather broad ; surface smooth and shining, finely 

 roughened with shallow punctures. 



Insect black. Mandibles, except tips, scape at tip and in front, flagellum be- 

 neath, line on prothorax involving tubercles, postscutellum, femora at tips, tibire 

 and tarsi, and apical margins of abdominal segments, pale yellow. Tarsi more 

 honey-yellow ; tegulse testaceous. Wings hyaline, nervures testaceous. Length 

 4 mm. 



Colorado. One male specimen (coll. Am Ent. Soc). 

 Dedicated to Prof. S. A. Forbes, of Champaign, 111. 



JJndeter mined. 

 Oxybelus iiiiigliiiniM Linn. 



