2 Myron Harmon Szvenk 



stigma reddish, basal nervure well based of transverso-medial nervure. 

 Abdomen pale red, the apical margins of tergites 1-4 broadly smooth and 

 more or less strongly dusky to blackish, tergite 2 with large, oval, yellow 

 lateral spots, 3 with much smaller lateral spots, 4 with a narrow, basal, con- 

 cealed yellow line. Femora merely dusky at vtry base beneath. 



c?. Length 5.5 mm. Black; labrum, mandibles except tips, band across 

 lower face involving the lower half of the clypeus and a corresponding 

 height on lower corners of face, and spots on sides of tergites 2-4, clear 

 yellow. Pubescence thin, wholly white, appressed and silky on the face. 

 Antennae in front reddish testaceous, above on joints 1-6 black, the follow- 

 ing joints above with dusky spots, joint 3 about two-thirds as long as 4, 

 apical joint pointed. Mesoscutellum convex but not at all bigibbous. Tu- 

 bercles and tegulae reddish. Nervures pale testaceous, basal nervure meet- 

 ing transverso-medial nervure. Legs black, the front and middle femora 

 and tibiae anteriorly, the knees and tibial ends all around and the tarsi, at 

 least apically, reddish testaceous. Abdomen with the whole of tergites 4 

 and 5 and the middles of tergites 2 and 3 blackish, the subapical margin of 

 tergite i and sides of tergites 2 and 3 reddish around the yellow spots. 

 Venter dark, the sternites broadly edged with reddish. Apex broadly 

 notched. 



Type. — Trenton, New Jersey, May 24, 1905 (H. L. Viereck), $. 



Allotype. — Germantown, Pennsylvania, June 18, 1905 (H. L. 

 Viereck), (^. 



A member of the nigrocincta group, and may be, in fact, merely 

 a strongly marked variety of N. nigrocincta F. Smith. Com- 

 pared with typical nigrocincta $, and its variety d. Lovell and 

 Ckll. 5, the present insect may be distinguished by its smaller size 

 {nigrocincta and nigrocincta var. d. are 8 mm. long), less in- 

 tensely black abdominal bands (black or blackened in nigro- 

 cincta), much darker flagellum (red, with at most only blackish 

 dots above in nigrocincta and var. d.) and less darkened femora 

 (extensively black beneath in nigrocincta and var. d.) ; it further 

 differs from var. d. in the unilineate mesoscutum (trilineate in 

 var. d.), the red metanotum and red lines on propodeum (these 

 parts black in var. d.), the largely red pleura (mostly black in 

 var. d.), the yellow lateral spots on tergites 2 and 3 (lacking in 

 var. d.) and especially the wholly white pubescence (fuscous on 

 face and mesoscutum in var. d.). From the closely related N. 

 fontis Ckll., it differs in the much darker flagellum (wholly red 



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