Ihjmp.noptnrowi Genera Myzlne and Ple^ia. o03 



tlie sides closely punctured, striated at tlie base, the groove 

 for the posterior femora shining and very strongly trans- 

 versely striated. Ahdomcai minutely and closely punctured, 

 with short, thin, white pubescence; tlio punctures oji the apex 

 of the sixth and the whole of the seventh segment large and 

 very sj)arse ; the apical two-thirds of the slender basal 

 segment nodose, the narrow basal third with a longitudinal 

 median sulcus. The second cubital cell is slightly longer 

 than the third on the radial nervure, the first recurrent nervure 

 is received at three-fitths from the base of the second culjital 

 cell, the second (which is slightly curved outwardly in the 

 middle) at one-third from the base of the third cubital cell. 



Black ; the ])ubescerice white, cinereous on the front ; the 

 ])alpi, the mandibles (except at the apex), the anterior and 

 intermediate tibia}, tarsi, and femora li^ht ferruginous; the 

 Sj)ines of the posterior tibia; and the teguUe testaceous; abdo- 

 minal segments 2-5 with strong blue tints. Wings hyaline, 

 the aj)ical third of the anterior pair flushed with purple; 

 ncrvures black. 



Length J 8, length of wing 12 mm. 



JIah. Sterkfontein, Transvaal (//. P. Thomasset). 



"J ype in B. M. 



Probably the male of P. diapheroganiia^ Sauss. 



Specimens from Natal differ in having the apical half of 

 the anterior wings and the apex of the posterior wings strongly 

 fusco-hyaline, (lushed with ))urple, and the blue tints on the 

 abdomen are less develoj)ed. This may prove to be the male 

 of P. rnfc<ps^ Sm., of which P. diaplierogamia is scarcely 

 more than a local colour-variety. 



Plesia (}fesa) adelognmia, sp. n. 



? . r*lypeus broadly rounded at the apex, dcejily and 

 closely punctured at the apex, shallowly and very s|inrsely at 

 the base, with a carina from the base to the apex. Mandibles 

 shining, with a sparse fringe of long dark fulvous hairs on 

 the lower margin. Scape shining, with a few scattered 

 punctures and a iiiw long fuscous hairs beneath, the first joint 

 of the flagelhim shining, the rest opaque. Front closely and 

 very coarsely punctured, without a median sulcus, the 

 tubercles at the base of the antenna smooth and shining ; the 

 vertex and the space round the ocelli rather sparsely putie- 

 tured. Pronotum coarsely but not very closely punctured ; 

 niesonotum smooth aivteriorly, very sparsely punctured on 

 the posterior two-thirds, with two longituilinal sulci on each 

 side ; scutellum sparsely punctured, the postscuteUuui 



33* 



