N0.14.S7. NORTH AMERICAN DIGdER WASPS— FERNALl). 319 



little finer than those on the clypcus, and with hair.s somewhat shorter 

 and finer; median suture plainly marked, forkino- in front of the 

 median ocellus, the two branches continuing ol)li(iuely liackward till 

 behind the line of the lateral ocelli where they are united by a faint, 

 backwardly arched, transverse suture or groove; traces of the median 

 suture are also present between the lateral ocelli; l)elow, and lateral 

 to the median ocellus is a short, narrow, vertical depression, and 

 behind, and lateral to each lateral ocellus is another smaller one, the 

 four tooether marking- the corners of a quadrangular area within which 

 the ocelli are located; vertex marked like the frons; cheeks minutely 

 punctured, and also with quite numerous larger punctures and long 

 hairs, particularly below; antenna? black; scape minutely punctured 

 and with scattered larger punctures and sliort, stifi' hairs; pedicel the 

 same; filament grayish sericeous in certain lights, its fii-st segment 

 longest; the first four segments of^ the filament show the following 

 length relationships gV? rs? i\? rr (average of several examples); 

 mandible black, three toothed, robust, with a slight ferruginous band 

 at the base of the teeth; somewhat punctured or aciculate, with a few 

 long hairs on the under or posterior edge, and on the upper (inner) 

 surface near the base. 



Thorax. — Neck short; collar rather long, its hinder face vertical, 

 not very high, not closely appressed against the mesonotum; anterior 

 face evenh" sloping, with a l)road, rounded top, so that the dorsal edge 

 is quite broad and evenly rounded from side to side, highest in the 

 middle; surface Idackish sericeous, with numerous coarse punctures 

 and long black hairs; propleura very minuteh^ obliquely aciculate 

 and with numerous fine punctures in rows; prosternum thickly, 

 closely punctured, with many long hairs; prothoracic lobe rather 

 sparsel}^ covered with punctures of medium size and black hairs; pos- 

 terior edge with quite a dense fringe of short, dull-brown hairs; meso- 

 notum black sericeous, with numerous rather coarse punctures and 

 long hairs; the anterior uiedian groove shallow, narrow, smooth, with- 

 out marked edges in front where it is broadest; lateral margin some- 

 what reflexed from above the prothoracic lobe to the scutellum; scu- 

 tellum rather high, rounded, with a very faint median depression; 

 surface with very minute punctures and numei'ous coarser ones and 

 rather short hairs; postscutellum evenly rounded, without a median 

 groove, rather finely and closely punctured, with hairs longer than 

 those on the scutellum, and with traces of fine transverse aciculation; 

 dorsum of medium segment rather finely, transversely aciculate, with 

 a faint median depression, broadest behind and hardly reaching the 

 anterior end; ver}' finely punctured along the grooves and with a thick 

 covering of short, erect, brownish hairs; dorsum bluntly acute at the 

 fovea, which is subtriangular; posterior end of median segment 

 coarsely punctured and with many long hairs; without aciculations in 



