^Ir. 1\. I'. Turner on Fcsson'al Uijmenoptera. 421 



($ . As in the female, but tlic pyp;i(Hal area is nearly as 

 broad at the base as long, loroadly rounded at the apex, and 

 the third eubital cell is rather longer both on the radius and 

 the eul)itus. 



Ilah. Salisbury, ^rashonaland, Ajiril (G. A. K. MarshaU) ; 

 Lilongwe district. Central Angoniland, lOOO-nOOO ft.: Nyasa- 

 land, between Kukuru Valley and Florence Bay, 4500 ft., 

 June (S. A. Neave). 



This seems to be nearly allied to T. argenteovest'ita, Cam,, 

 but is a much larger species, and differs in the details of 

 neuration, the colour of tlie wings, and the number of spines 

 on the fore tarsi. 



Gastrosericus lumellatus, sp. n. 



$ . Nigra ; argentco-pilosa : callis hnmcralibus, tegiilis, tibiis 

 supra coxisque anticis subtus tubcrculatis flavis ; mandibnlis 

 flavo-tcstaceis ; tarsis scgmentisque abrlominalibus apice brunneis ; 

 alls hyalirna, venis fuscis ; mandibnlis longis, acutis, basi 

 latisslmis ; clypeo porrecto, lamellato, apice excise, angulis in 

 spinis productis ; facie ad basin antennarum late excisa, in spinam 

 acutani supra basin niaudibularum producta. 



Long. 7 mm. 



? . Mandibles very long, slender at the apex, very broad 

 and flattened at the base, excised on the outer margin close 

 to the middle, not dentate, strongly cl^rved. Clypeus in the 

 form of a porrect lamella, longer than broad, slightly 

 narrowed to the apex and deeply eraarginate, the angles of 

 the emargination produced into spines. Face deeply excised 

 on each side of the clyi)eus as far as the base of the antennae, 

 produced into a long slender spine at the base of the man- 

 dibles ; second joint of the flagellum half as long again as 

 the third. Checks more than half as broad as the eyes, 

 •which diverge moderately towards the clypeus and are sepa- 

 rated on the vertex by a distance about equal to the length 

 of the four basal joints of the flagellum. Anterior coxae 

 produced beneath into a compressed tubercle, broad, trun- 

 cate at the extremity, and longer than the trochanter; basal 

 joint of anterior tarsi with five slender and not very long 

 spines. Pygidial area bare, sparsely punctured, about twice 

 as long as the breadtli at the base; median segment with a 

 carina from the base not reaching the apex. The two 

 recurrent nervures unite just before joining the cubitus, in 

 some specimens just at the junction. The first abscissa of 

 the radius is less than twice as long as the second. 



Hab. Pakasa, Zambesi River, January [SUverlock). 



