NO. 1487. NORTH AMERICAN DIGGER WASPS— FERNALD. 395 



short, blunt lobes at the middle, separated hy a slight notch; head 

 above the pubescence sparsely, rather finely punctured and bearing- 

 long, slender hairs; behind the ocelli is a slightly elevated, transverse- 

 oval, velvety area; occiput and cheeks minutely, closely punctured 

 and with long, yellowish hairs; cheeks pale golden pubescent close 

 behind the eyes, beginning just below the top of each e3"e; with long, 

 pale yellow hairs more abundant below; inner margins of the eyes very 

 slightly converging downward; antenna black; scape strongly serice- 

 ous, almost pubescent, with numerous short, pale yellow hairs on its 

 upper and inner sides; first segment of the filament longest; the entire 

 filament slightly sericeous in certain lights; mandibles black with a 

 faint ferruginous tinge; with longitudinal strise on the basal part of 

 the under surface, a few long, yellow hairs on the inner edge, and a 

 fringe of similar hairs on the posterior face. 



Thora.e. — Collar covered everywhere above with pale yellow, almost 

 silvery pubescence, lea.st dense near the middle line; with numerous 

 long, pale yellow hairs; posterior surface not closely appressed against 

 the mesonotum, it and the anterior face nearly vertical; the dorsal 

 edge rather flattened above; the sides bare; prothoracic lobe with pale 

 yellow pu])escence behind; mesonotum with a yellow pubescent ]>and 

 at the side, extending backward from in front of the tegula till it 

 bareh" meets the corresponding band of the other side on the median 

 line behind; the rest of the plate closely punctured and covered with 

 short, pale yellow hairs; anterior median groove faint; scutellum with 

 a median depression, strongest behind, minutely punctured; postscu- 

 tellum pale yellow, almost silvery pubescent to the groove at the 

 side of the dorsum of the median segment but showing a median 

 depression; dorsum of the median segment sparsely pale yellow, 

 almost silvery pubescent and with quite a dense covering of rather 

 short, pale yellow hairs; posterior end of the segment with two 3'el- 

 lowish-silvery pubescent spots, confluent on the middle line, their 

 dorsal portions extending a short distance along the suture from the 

 fovea to the stigma; the area between this pubescence and the stigmatal 

 groove black, roughened, particularl}" below;, the end and sides of the 

 median segment thickly clothed with long, pale 3'ellow hairs; meso- 

 pleuron with a large, pale 3'ellow pubescent spot just behind the pro- 

 thoracic lobe; a rather broad, silvery strip of pubescence runs from 

 above the hind coxa along the stigmatal groove to the stigma, then 

 toward the base of the hind wing, becoming broader and with long, 

 yellowish hairs, making this portion more j^ellow; petiole short, 

 straight, black, yellowish-white sericeous and bearing quite long, pale 

 yellow hairs. 



Abdomen. — Not as long as the thorax, elongate-oval, quite pointed 

 at both ends; above, ferruginous except for a narrow cross band of 

 dark color just behind the petiole (not alwa^^s present) and a cross 



