KO.H87. NORTH AMERK'AX DIGGER WASPS— FERNALD. 355 



punctured to the level of the ocelli; lateral ocelli nearer each other 

 than to the compound eyes; vertex and cheeks rather less closely punc- 

 tured than the frons, bearing long, erect hairs; cheeks narrow, less 

 than half the width of the eye; eyes about equidistant at the vertex 

 and clypeus; antennse black; relative lengths of the filament segments 

 T2» \%, T¥i T5, T7, 1%, i\; mandibles glistening black, two toothed, 

 neither tooth showing an}" sign of division into two. 



Thora.r.— Collar ver}' narrow at its dorsal edge, sparingly punctured, 

 with a trace of silvery pubescence at the sides of this edge in some 

 cases; prothoracic lobe fringed behind with tine, whitish hairs; meso- 

 notum with a median impressed, narrow band on its anterior third; 

 the remainder closely punctured; scutellum broad from front to rear, 

 rather flattened, quite evenly but not very closely punctured; post- 

 scutellum narrow, evenly rounded, punctured like the scutellum; dor- 

 sum of the median segment very closely, coarsely punctured, quite 

 thickly covered with erect black and gray hairs; fovea somewhat cres- 

 centic, shallow, with a faint depression running from its middle 

 toward the petiole; coarsel}" punctured (possibly with faint elevations 

 instead); sides of the thorax quite evenly but not very closely punc- 

 tured; an impressed line runs from the hind coxa toward the stigma 

 of the median segment but is very faint and can hardly be called a 

 stigmatal groove; a similar line runs more directly forward to the 

 vertical part of the mesopleuron; petiole black, slightly curved, con- 

 siderably longer than the posterior metatarsus, bearing numerous 

 long, gray hairs. 



Ahdo/nen. — Black, glistening, with numerous short, erect hairs on 

 the posterior plates; the first plate long, rather acuminate and fre- 

 quently with a trace of ferruginous just behind the petiole; beneath 

 flattened, the third, fourth, fifth, and sixth plates each with a trans- 

 verse row of hairs projecting backward; the sixth and more posterior 

 plates more or less broadly emarginate. 



Whigx. — Entirely fuliginous in some cases, the anterior half only 

 in others, with a blue to violet reflection; cubital and su])discoidal 

 veins of the forewing well developed beyond the ends of the cells; 

 discoidal vein of the hind wing interstitial, the cubital at that point 

 bending sharply forward before resuming its outward direction; the 

 radial and cubital veins of this wing well developed beyond the trans- 

 verse cubital. 



Legs. — Black, sometimes with traces of ferruginous in places; glis- 

 tening; posterior face of the hind tibiae strongly brownish sericeous; 

 spines black. " 



Length. — Females, 18-22 mm.; males, 13-20 mm. 



This species does not appear to be very common, though widelv dis- 

 tributed. I have seen specimens from Long Island, New York; Belle 

 Plain, Clementon, Riverton, and Glassboro, New Jersey; Philadel- 



