WERNER MARCHAND 171 



parasites. To judge from the illustration it might be a species of 

 Phanurus, but as the figures are life size, not much can be seen of 

 structural details. 



As elsewhere in tropical Africa, this is probably the commonest 

 species of the genus in the Mlanje district, where Neave bred it also 

 from larvae. 



The larva is, according to Neave, chiefly remarkable for its white 

 color and lack of pigment, and for the presence of a row of bristles 

 immediately anterior to the anus. It is one of the most active and 

 restless species Neave had to deal with. 



Tabanus {N eotahanus"^^) triangulum Wiedemann. — This Brazilian 

 species was reared by Lutz, at Manguintros, Brazil, in February, 

 1914, from full grown larv£e, which were obtained by sifting the mud 

 from the edges of a small brook (together with those of Neotahanus 

 ochrophilus), and breeding in damp moss. No morphological dif- 

 ferences were observed between this species and Tabanus ochrophilus. 



Tabanus trimaculatus Palisot de Beauvois. — A species occurring in 

 the middle and southern states west to Kansas (Hine). We possess 

 very few data on its early stages. 



Hine mentions (1903) that he has been in possession of the eggs, 

 in connection with his studies on extermination of tabanids by col- 

 lecting and destroying the eggs. By counting it was found that 

 twenty egg masses of Tabanus trimaculatus averaged over 500 eggs 

 each. 



Brimley found, on April 15, 1909, two larvae of Tabanus, under the 

 bark of a soggy log which was an inch or two above the water. One 

 died; the other was put into a bottle with some wet dirt and rotten 

 wood, and "from this a male of Tabanus trimaculatus was bred on 

 May 18 of the same year. The larva that died and which was 

 presumably the same species was preserved in alcohol. It measures 

 37 mm. in length and is white without markings. "^^ 



Tabanus tropicus Linne. — A species found in Europe (Laibach and 

 Trieste, according to Schiner), but also in India (same species?) and 

 here said to be a carrier of surra (Neveu-Lemaire) . 



^^ In the meantime, I have repeatedly found the larvae in Princeton (1917) 

 and bred the adult. 



