NO. 1487. NORTH AMERICAN DIGGER WASPS— FERNALD. 369 



its flattened upper surface densely brownish-black sericeous; its pos- 

 terior and lateral sloping- surfaces golden sericeous, almost pubescent; 

 postscutellum golden pul)escent as far to the sides as the beginning of 

 the groove on the median segment; dorsum of the median segment 

 entirely, very thickly pubescent, the fovea a rather short crescent; 

 posterior end making quite a sharp angle with the dorsum, densely 

 pubescent; sides with a broadening pubescent band running forward 

 from above the hind coxte to the stigma, leaving a rather narrow black- 

 sericeous band between it and the posterior pubescence, just above the 

 coxa; dorsum, sides and end thickly covered with erect, yellow hairs, 

 shortest on the dorsum, and so thickly placed as to almost conceal the 

 black band in some lights; mesopleura with a large pubescent spot 

 just behind the prothoracic lobe and extending upward to the base of 

 the fore wing; also with a spot (sometimes a band running upward 

 and forward) a))Ove the middle coxa^; the rest black, somewhat seri- 

 ceous, with scattered, fine punctures and numerous short, golden 

 hairs; metapleura black in front of the pubescent band along the stig- 

 matal groove; mesosternum black, with a tendency toward golden 

 sericeous; with scattered, fine punctures and short, golden hairs; peti- 

 ole very short, stout, straight, pale ferruginous, golden sericeous, 

 almost pubescent, and with man}^ short, golden hairs; about half as 

 long as the second hind tarsal segment, less than two-thirds as long as 

 the first filament segment and about equal to the second. 



Abdomen. — Rising quite high above the petiole, pale ferruginous, 

 sometimes varied with darker, long and pointed at both ends, but 

 more so posteriorly; above, pale sericeous, less so posteriorly, with a 

 few faint punctures on the fourth plate, more and coarser on the fifth, 

 and with many coarse ones on the terminal one, making its entire sur- 

 face quite roughened; a few rather siiort, yellow hairs are present 

 on the sides of the fifth plate, more and longer on the last, the extreme 

 lateral edges of which are smootii; this plate is rather narrow and acu- 

 minate behind, but without a sharp pointed tip; beneath ghstening, 

 with a few minute, scattered punctures and short hairs, both becoming 

 more abundant and coarser po.steriorly, but absent on the middle line; 

 on the posterior half of the last ventral plate they become quite coarse 

 and close together, and there are numerous yellow hairs; hinder mar- 

 gin of the terminal plate rather narrowly obtusely rounded. 



Wi7igs. — Quite hyaline, distinctly yellowish half way out or more 

 from the base, somewhat fuliginous on the outer margin, particularly 

 at the end of the radial cell and slightly fuliginous over the entire 

 wing, the depth of this varying in different specimens; forewing with 

 the second transverse cubital and first recurrent veins nearly or quite 

 interstitial; the second and third transverse cul)itals much nearer on 

 the radial than the second transverse cubital and second recurrent are 

 on the cubital; the third cubital cell not reaching the end of the radial 



