NO. 1487. NORTH AMERICAN DIGGER WASPS— FERNALD. 343 



base of its mate; with an aciculated groove on its front face leading 

 about to the middle tooth and one beneath, besides a few scattered 

 aciculations near the l)ase; behind is a row of long-, brownish hairs. 



Thora.r. — Collar rather small, its dorsal edge lower than the highest 

 part of the mesonotuni; neck above with a few transverse striations in 

 front, and short, fine, white hairs; its hinder part near the collar 

 smooth, glistening; the angle l)etween the neck and collar nearly a 

 right angle; base of the anterior face near the middle bare, glistening, 

 with one or two short, transverse stri{\>; the rest of this face and the 

 dorsal edge quite densely white pubescent; dorsal edge evenly rounded 

 from front to rear and from side to side, with no median depression, 

 somewhat appressed against themesonotum; sides of the collar faintly 

 whitish sericeous, obliquely striated near the base of the prothoracic 

 lobe; basal part of the prothoracic lobe very minutely punctured, its 

 hinder half silvery white pubescent and with numerous very tine, 

 long, white hairs; a smooth round hump is present on the collar near 

 the upper part of the base of the prothoracic lobe; prosternum faintly 

 sericeous at the sides, with numerous coarse punctures and long, tine, 

 dirty white to brownish hairs beneath; mesonotuni bent strongly 

 downward in front, (juite densely black sericeous, with an evident 

 median groove extending about halfway back on the plate; lateral 

 and hinder margins of the plate somewhat retlexed; a silvery white 

 pubescent band extends along each side of the plate from in front of 

 the tegulffi backward to its posterior corners and perhaps a little 

 inward on its posterior margin; area inside these bands minutel}", 

 closely punctured; scutellum somewhat higher than the adjacent part 

 of the mesonotuni, with a slight median depression, somewhat sparsel}^ 

 silveiy white pubescent, its sides behind, slightly, obliquely aciculate; 

 postscutellum silvery white pubescent in the middle, its sides blackish 

 sericeous; median segment dull black on the dorsum, showing faint 

 traces of transverse aciculation and rows of tine punctures, sparsel}" 

 clothed with whitish hairs of medium length; angle between the dor- 

 sum and posterior end of the median segment obtuse, though quite 

 sharp; fovea a circular depression a little below the angle; posterior 

 surface slightly, not closely aciculate, bearing longer whitish hairs than 

 those on the dorsum; from the stigmatal region laterally the rugosity 

 is greater and the lines above run almost horizontally, but below they 

 extend more obliquely forward and downward, crossing an impressed 

 line which runs forward from the hind coxaj onto the metapleura, 

 being quite coarse Avhere they cross this line; sides of the median seg- 

 ment and metapleura sparsely covered with whitish hairs; metapleura 

 obliquely rugose, most tinely so near the base of the hind wings, with 

 a small, silvery whitish spot of pubescence often, just above the hind 

 coxffi; mesopleura coarsely, obliquely rugose, finest behind and above 

 the prothoracic lobe; with scattered, coarse punctures along the 



