.12 Myron Harmon Szvenk 



and usually of posterior tibiae, yellow. Ends of mandibles, spot between 

 bases of antennae, spot involving ocelli, posterior face of cheeks, propleura, 

 narrow anterior and posterior margins and broad median band on meso- 

 scutum, depressed sides of mesoscutellum and metanotum, lower portion of 

 median propodeal band, metapleura and contiguous parts of propodeum, 

 middle coxae and posterior faces of front and hind coxae, small spots on 

 middle femora at base, large vaguely defined areas on posterior face of 

 hind femora, mesosternum and small contiguous spots on lower meso- 

 pleura, black. Antennae red, the ends of the joints faintly dusky above, 

 joint 3 nearly equal 5, about two-thirds as long as 4- Wings hyaline, 

 darkened at ends and in marginal cell, the nervures yellow, subcostal 

 nervure blackish, basal nervure well basad of transverso-medial. Meso- 

 scutellum strongly bilobed. Outer face of hind tibiae finely tuberculate. 

 Pubescence sparse, white or whitish, most obvious on labrum, occiput, 

 cheeks, mesopleura, coxae and angles of propodeum. Thorax strongly, 

 very densely punctured, head similarly but more finely punctured, abdomen 

 minutely punctured. Abdomen red, basal half of tergite i black, broad and 

 complete yellow bands across middle of tergites 1-4, that on i sometimes 

 narrowly interrupted, 5 entirely yellow, sternites 2-4 broadly yellow at 

 base, sternite 5 mostly yellow. 



c?. Length 7.5-9 mm. In general resembles the ?• Mandibles except 

 tips, labrum, line under and partly behind eye, clypeus, supraclypeus, lateral 

 face marks ending broadly at level of antennae, scape in front, collar, 

 tubercles, tegulae, large L-shaped spots on anterior mesopleura, oval spots 

 on propodeum behind and sometimes on enclosure, whole of anterior 

 coxae in front and spots on the other coxae, spots on first four trochanters 

 in front, usually small spots on first four tibial ends and often on the 

 knees, yellow. Area between bases of antennae extending broadly down 

 sides of supraclypeus and into clypeal sutures below, and coalescing broadly 

 with an area involving ocelli above, and cheeks behind, black. Black mark- 

 ings of thorax as in the $ except that this color involves all of the median 

 band of the propodeum and encroaches not only over most of the sides of 

 the propodeum but over much of the posterior and inferior portions of the 

 mesopleura also, and the mesoscutum sometimes has faint lateral lines. 

 Mesoscutellum usually wholly red, rather feebly bilobed. Flagellum red, 

 largely blackened above, joint 3 less than one-half as long as 4, only slightly 

 over one-third as long, and distinctly shorter than 5. Abdomen colored 

 much as in the ?, tergites 5 and 6 yellow with an apical band or subapical 

 line of reddish, 7 red, deeply notched, venter red with sternite 2, and 

 usually 3 to 6 also, spotted or banded with yellow. 



Type. — Fargo, North Dakota, June 14, 1913, on Zisia aiirca 

 (O. A. Stevens, No. 4857), $. 

 Allotype.— Ty^^ lot (No. 4858), ^. 



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