298 Mr. E,. E. Turner 0)i Fossorial ITijmenoptera. 



the first segment sliiiiing and sparsely punctured, narrowed 

 towards the base and produced into a bluntly rounded [jro- 

 niiuence which projects over the apex of the median segment ; 

 second segment slightly broadened from the base, with tliree 

 well-marked transverse carinae, in addition to which the 

 apical margin is slightly raised; the remaining segments 

 shining and very sparsely punctured ; pygidium almost 

 vertically truncate, the surface of the truncation rugose, 

 small and ovate, the ventral plate projecting beyond the 

 dorsal and pointed at the apex. Ventral segments sparsely 

 ])unctured, most deeply on the fifth. 



Black ; the first dorsal abdominal segment (except at the 

 base and on the middle of the apical margin), a small spot 

 on each side near the base of the second segment, a large 

 spot on each side on the third and fourth segments, and a 

 small spot on each side of the fifth segment yellow ; legs 

 testaceous brown; mandibles and antennae fuscous. 



Length 8 mm. 



Hab. Tucuman, N. Argentina {Steinhach). 



Type in Berlin Museum. 



l1ie shape of the first abdominal segment somewhat recalls 

 S. bltuberculutus, Turn. 



Parelaphropter'a rollei, Turn. 



Paeudehipliroptera rollei, Turu. Trans. Ent. Soc. London, p. 72 



(1908). J. 

 Parelaphroptera rollei, Turn. Wj'tsman's Genera Insectorum, cv. 



p. 21. J. 



$ . ^Mandibles simple, not bidentate ; clypeus without a 

 carina, the anterior margin transverse. Head distinctly 

 broader than long, slightly narrowed anteriorly^ the posterior 

 angles rounded, shining and almost smooth, with a very 

 short frontal sulcus, the position of the ocelli indicated by 

 shallow and rather indistinct punctures, the cheeks produced 

 at the base of the mandibles into a blunt tubercle notched at 

 the apex. Antenna3 short, the length of the flagellum not 

 exceeding the length of the head. Pronotum nearly twice as 

 broad as long, the sides parallel, almost as broad as the head, 

 finely and closely punctured ; scutellum much broader than 

 long, narrowed towards the apex and sparsely punctured ; 

 median segment as long as the pronotum, broadentd from the 

 base, very steeply sloped posteriorly, sparsely punctured. 

 First abdominal segment vertically truncate at the base, much 

 shorter than the second and not much narrowed anteriorly ; 

 second segment with a low carina near the base, another, 

 higher, near the apex separated by a deep groove from the 



