liERGROTH: ON SOME SOUTH AFRICAN TIl'UMDAE. I 35 



drui)lo breviore, vena transversa majore longe ante cellulam 

 discoidalem apertam sita. Haltères lutei. Pedes tenuissimi, 

 nitidi, lutei. Abdomen superne fusco-luteum, ventre, segmentis 

 diiobus basalibus fuscoluteis exceptis, pallide sulfureo. Long, cf 

 corp. 4,5 mm., alae 5 mm. 



This species, of an aerial and exceedingly delicate appearance, 

 was found in Cafifraria by Wahlrerc;. It is the first Gonoviyia 

 found in Africa, and differs from its congenerics by having the 

 subcostal cross-vein at a much longer distance from the tip of the 

 auxiliary vein. I have seen an other Gonoviyia, more resembling 

 certain european species, from the neighbourhood of Cape Town, 

 but its head being lost, it is unfitted for description. 



10. Trentepohlia exornata n. sp. 



Caput cum palpis et antennis nigrum, his collare nonnihil 

 superantibus, articulo primo longiusculo, cylindrico, lineari, secundo 

 brevi, flagello tenui. Collare antice in collum sat longum prolon- 

 gatum, fuscum. Thorax antice supra collare tumide prominens, 

 obscure fulvus, vitta media dorsali fusca notatus, postice fuscescens; 

 pleurae fuscae. Scutellum et metanotum nitidiuscula, fusca. 

 Alae (flg. 3) fusco et hyalino variegatae: dimidio basali hyaline 

 praeter ])refurcam et venam postbrachialem fuscolimbatas, tum 

 fascia angustiore irregulari fusca per totam latitudinem alae per- 

 tracta et venas transversas, cubitalem, radialem prope basin sub- 

 costalemque ante apicem occupante, deinde fascia transversa 

 hyalina sat lata, medio tamen angustiore, triente apicali alae, 

 macula hyalina marginem alae tangente in cellula submarginali 

 prima excepta, fusco, etsi marginem posteriorem versus paullo 

 dilutiore; macula hyalina etiam adest in parte ima basali cellulae 

 marginalis; venae alarum fuscae sunt praeter subcostalem flavam, 

 attamen venarum partes in fascia media hyalina currentes palli- 

 dissimae sunt, si ab illa cellulam discoidalem apertam a cellula 

 submarginali secunda discernente discesseris, quae fusca est; vena 

 auxiliari paullo ante apicem venae subcostalis desinente, hac vena 

 usque ad fasciam mediam hyalinam crassiore, exinde attenuata et 

 ad venam radialem decurvata, mox ante apicem venulam obliquam 

 ad marginem alae mittente; vena radiali paullo ante medium alae 



