40 Mr. R. E. Turner on 



sexes are slightly more yellowish at the base, and the galea 

 is distinctly shorter and broader, being scarcely more than 

 half as long as the scape, whereas in inexorabilis it is nearly 

 as long as the scape. 



Length, (^ 11 mm., ? 12-14 mm. 



Hab. Nyasaland, Mlanje {S. A. Neave), January and 

 February. 



There are only five spines on the basal joint of the fore 

 tarsus, in which character it agrees with T. disputabilis, but 

 the apical segments of the male are much broader than in 

 tliat species. Tlie male has only four spines on the basal 

 joint of the fore tarsus. 



48. Tacky tes lachesis, sp. n. 



2 . Xigra ; tibiis anticis basi extremo, calcaribus, tarsisque arti- 

 culis apicalibus fusco-ferrugiueis ; alls hyalinis, pallidissime 

 flavidulis, veins ferrugiueis ; f'ronte clypeoque aureo-pubesceuti- 

 bus ; thorace segmentoque mediano griseo-aureo-pubescentibus ; 

 segmentis dorsalibus 4 basalibus fascia apicali subargeuteo- 

 pubescente ; area pygidiali fusco-ferrugineo-pubescente. 



Long. 13 mm. 



? . Clypeus very broadly rounded at the apex ; galea 

 much shorter than the scape ; vertex microscopically punc- 

 tured in the middle, with a few larger punctures near the 

 eyes, which are separated on the vertex by a distance equal 

 to tlie combined length of the two basal joints of the 

 flagellum. Basal joint of the fore tarsi with six spines ; 

 spur of the hind tibia longer than the basal joint of the 

 hind tarsus. ]\[edian segment scarcely longer in the middle 

 than the scutellum, with a shallow, but distinct longitudinal 

 sulcus. Sternites 3-5 shining, with large sparse punctures, 

 smooth at the base. Pygidial area broadly rounded at the 

 apex. 



Hab, Nyasaland, Mlanje (S. A. Neave), February. 



49. Tachijtes megcera, sp. u. 



$ . Nigra ; tarsis subtus, articuloque apicali supra, calcaribusque 

 ferrugiueis ; tegulis testaceis ; alls basi flavidulis, apice byaliuis, 

 vcuis ferrugiueis ; fronte clypeoque argenteo-pubescentibus ; 

 tborace segmentoque mediano albido-pubescentibus ; segmentis 

 dorsalibus 4 basalibus fascia apicali griseo-argenteo-pubescente ; 

 area pygidiali fusco-ferrugineo-setosa. 



Long. 13 mm. 



$ . Clypeus broadly subtruncate at the apex, the apical 



