K0.1487. NORTH AMERICAN DIGGER WASPS— FERN ALD. 315 



upper part of antorior face somewhat depressed in the middle, making 

 the dorsal edge two-humped, the height of these humps varying con- 

 siderably; neck transversely rugose, these marks var3'ing in strength 

 and frequentiv extending back onto the lower part of the collar, the 

 surface Ckf which is more or less punctured and bears short black 

 hairs varying in size and abundance like the punctures; side of collar 

 in front of prothoracic lol)e sometimes fainti}' rugose vertically; pro- 

 thoracic lobe generally quite closely, sometimes sparsely, punctured and 

 with numerous, quite long, black hairs; its posterior edge with a dense 

 fringe of short, pale hairs; prosternum and propleuron with a thicken- 

 ing at their edges, thus placing their suture between two ridges; this is 

 also the case on the middle line of the prothorax beneath, thus dividing 

 the prosternum {() into right and left halves; sternal surface with nu- 

 merous punctures and long, black hairs ; sericeous ; mesonotum sericeous, 

 with punctures varying in abundance and size, and Avith short, black 

 hairs; from the upper edge of the prothoracic lobe to the tegular, then 

 back along the side of the plate, and partly across the hinder end, the 

 edge of the mesonotum is upwardly reflexed; two short, faint, im- 

 pressed lines are present on the middle anteriorly and a faint parap- 

 sidal groove is perceptible; scutellum without a median furrow, its 

 central portion elevated to form a nearly Hat, transverse, oval area 

 bearing a few scattered, rather small punctures, sometimes ver}- faint 

 or absent; at the anterior lateral sides the plate is not depressed and 

 is somewhat triangular there, the upper surface of this portion being 

 smooth, wdiile its outer side which faces outward is usually slightly 

 rugose, as is also the posterior lateral face of the scutellum in most 

 cases; postscutellum with a slight median impression, a slightly 

 reflexed edge anteriorly, and in general minutely punctured and with 

 a tendenc}" to transverse aciculation; dorsum of median segment iiot 

 pointed Init evenly rounded behind to the fovea, which is a narrow, 

 transverse depression; surface of dorsum transversely" rugose, the 

 ridges turning somewhat backward laterally, the rugosity coarsest in 

 front, frequently nearly or (|uite obsolete behind; there is a distinct 

 median depression on the dorsum, sometimes slight or absent ante- 

 riorly; the surface is usually bare, but sometimes bears verv short, 

 black hairs; stigmatal groove well developed; posterior end of median 

 segment turning downward sharply from the dorsum, its surface 

 coarsely rugose and punctured; in some cases the lirst ridge below the 

 fovea is much higher than the others and sometimes near the dorsum at 

 the sides the I'ugosity becomes almost obsolete; the surface is quite well 

 provided with black hairs of medium length, which, near the stigmatal 

 groove, are longer and more abundant and the ridges are coarser; 

 mesopleura quite coarsely punctured, sometimes partly rugose, with 

 scattered black hairs; mesosternum marked like the mesopleura and 

 with a median suture; metapleura coarsely, obliquely rugose and with 



