360 Mr. R. E. Turner on Fosson'al Hymenoptera. 



scutelluin convex, feebly bituberculate. Median segment 

 clothed with long whitish hairs whieli are denser on the apical 

 and lateral surfaces than on the dorsal, finely and closely 

 transversely striated. Petiole about as long as the second 

 joint of the hind tarsi ; abdomen pruinose, the apical margins 

 of the segments brownish. Third abscissa of the radius 

 shorter than the first. Comb of the fore tarsi long and very 

 slender, fore metatarsus with ten long spines on the outer 

 side and apex. 



$ . Very similar to the female, but the pubescence on the 

 face and clypeus paler ; the petiole half as long again as 

 the second joint of the hind tarsi; seventh tergite very 

 broadly subtruncate at the apex ; seventh sternite widely and 

 shallowly emarginate; the eighth produced into a point at 

 the apex, subcarinate longitudinally in the middle, the sides 

 slightly sinuate. 



Ilab. Sinapunge, North Rhodesia (0. Silverlock), February 

 1911, $ (J ; Valley of N. Rukuru, Karonga, Nyasaland, 

 2000-4000 ft. {S. A. Neave), July 1910, $ <$ . 



The eighth sternite of the male is shaped somewhat as in 

 malagassus, Sauss., but is more distinctly pointed. The 

 colouring of the female is very similar to that of gorgon, 

 Kohl, but the sculpture of the median segment is very 

 different; the postscutellum is also similar to that of gorgon, 

 but the pronotum has a median sulcus in rufiscutis which is 

 absent in gorgon. 



Chlorion (Proterosphex) observabilis, sp. n. 



$ . Nigra, robusta ; pleuris, mesosterno segmentoque mediano 

 dense pallido-aureo-pubescentibus ; alis fusco-hyalinis, venis 

 nigris. 



Long. 26-30 mm. 



$ . Clypeus with sparse long black hairs, closely covered 

 with pale golden pubescence, convex ; eyes separated on the 

 vertex by a distance greater than the combined length of 

 the two basal joints of the flagellum. Ocellar space slightly 

 depressed, the posterior ocelli much nearer to each other than 

 to the eyes. Vertex sparsely clothed with long black hairs, 

 the temples with long pale golden hairs. Pronotum short, 

 transverse ; mesonotum opaque, rather closely clothed with 

 short black hairs ; scutelluin shining, with a shallow longi- 

 tudinal impression ; postscutellum without, a groove. Median 

 segment, pleurse, and mesosternum densely covered with very 

 pale golden pubescence, with long hairs of the same colour 



