NO. 1487. NORTH AMERICAN DIGGER WASPS— FERNALB. 415 



or less developed silvery pubescent band on each side, extending 

 from in front of the tegula backward to the end of the plate, 

 then inward toward the l)and of the other side, which it usually 

 does not (piite meet; median anterior groove very slight; surface 

 of the mesonotum elsewhere sericeous, with very minute punc- 

 tures, and scattered, coarser ones; scutellum black, sericeous in 

 certain lights, with a few small, scattered punctures, and a ver}" 

 slight median groove; postscutellum silvery pubescent, with a median 

 groove, the pubescence extending to the lateral edge of the dorsum 

 of the median segment; dorsum of the median segment sericeous, with 

 a slight, longitudinal, elongate-oval depression in front of the fovea; 

 posterior end of the segment with two spots of dense, silvery pubes- 

 cence, confluent at the middle and extending part way around the 

 petiolar articulation; between these spots and the stigmatal groove the 

 surface is Idack, with short, transverse aciculations near the dorsum; 

 entire surface of the median segment quite thickly clothed with pale 

 hairs, longest behind; surface of the dorsum dull black, minutely 

 roughened; mesopleuron with a pale pu))escent spot just behind the 

 prothoracic lobe; the rest of the plate black, quite smooth or \Qvy 

 minutely punctured, and with many very short, erect, pale hairs; there 

 is a very faint pubescent spot in front of and above the mesocoxa and 

 a well-developed pubescent l)and running upward from the hind coxa 

 along the stigmatal groove to the stigma and in some cases showing a 

 little behind the groove; aside from these pubescent areas the surface 

 of the metapleuron is black, quite smooth, and sparsely covered with 

 short hairs; petiole short, black, sericeous, bearing numerous whitish 

 hairs. 



Abdomen. — Elongate-oval, longer than the thorax, about equally 

 pointed at both ends; sericeous above, particularly on the anterior 

 half; the first and most of the second dor.sal plates dull ferruginous, 

 the amount of ferruginous varying in difterent specimens; remaining 

 plates black or varied more or less with ferruginous; last two dorsal 

 plates rather coarsely punctured, the punctures coarser and closer on 

 the last, both plates bearing scattered brown hairs; beneath rather 

 glistening, l)earing a few scattered hairs on each plate, rather more 

 abundant posteriori}^; apparently extremely closely and minutely 

 punctured, and with a few more pronounced, scattered punctures, 

 which are most numerous posterioily; dorsal and ventral terminal 

 plates rather narrowly rounded behind. 



Wings. — Hyaline, rather fuliginous on the outer margin, this being 

 strongest on the fore wing and just beyond the end of the radial cell; 

 first recurrent vein of the fore wing almost interstitial with the second 

 transverse cubital vein; transverse median vein of the hind wing 

 slightly arched, making rather more than a right angle with the median; 

 discoidal vein not interstitial; cubital vein with a slight backward bend 



