Mr. R. E. Turner on Fossorial Hymenoptera. 441 



no longer tlian the penultimate, sliglitly curved and excavate 

 beneath, very blunt at the apex ; thorax and the whole 

 abdomen finely and closely punctured ; seventh dorsal seg- 

 ment narrowly roundel at the apex ; first transverse cubital 

 iiervure curved ; second abscissa of the radius as long as 

 the first. 



? . Apical joint of the flagellum very blunt at the apex ; 

 scutellum without a median depression ; the whole insect 

 more finely punctured than the male, the punctures on the 

 first dorsal segment microscopic; sixth dorsal segment 

 closely and not finely punctured, clothed witii very short 

 fulvous setae, narrowly rounded at the apex, the margins of 

 the pygidial area not elevated. Basal joint of the anterior 

 tarsi with six spines. 



Hah. Uganda ; Elephant Camp, Toro, November, i: ^ S 

 (R. E. McConnell) ', Semliki Plains, near southern shore of 

 Lake Albert, 2200 ft., November, 2 ? ? (5. A. Neave). 



In the form of the female sixth dorsal segment, which is 

 produced and narrowly rounded at the apex, this resembles 

 nS", rubellus, Turn., but in that species the cloud on the fore 

 wing is very faint and does not extend beyond the radial cell ; 

 the apical joint of the flagellum is also blunter in multicolor 

 and the yellow markings very different, also the fulvous setae 

 of the sixth dorsal segment. In S. ferrugineus, Sm., the 

 cly|)eus is more deeply emaro-inate. Handlirsch gxyes, ferru- 

 gineus as a synonym of zonatus, Klug^ but tliis is quite wrong 

 in my opinion. 



Siizus ruhrqfiavus, sp. n. 



5 . Ferruginea ; clypeo dimidio apicali, fronte sub antennis, scapo 

 subtus, pronoto margine posteriore, segmento dorsali priino 

 macula utrinque, segmentis 2-5 dorsalibus et ventralibus fascia 

 late interrupta, segmentoque dorsali sexto macula magna utrinque 

 flavis ; alls hyalinis, venis testaceis, cellula radiali leviter 

 infumata. 



Long. 20 mm. 



? . Clypeus broad, deflexed from the middle and widely 

 emarginate at the apex, the basal portion subcarinate in the 

 middle and smooth, the apical portion and the labrum 

 coarsely but shallowly punctured. Frontal scutellum be- 

 tween the antennae and the base of the clypeus short, about 

 twice as broad as long. Thorax almost smooth ; scutellum 

 without a median depression ; median segment closely punc- 

 tured. Abdomen shining, the two basal segments almost 

 smooth ; the apex of the third and the whole of the fourth 



