360 Mr. E. E. Austen on new 



Copeman) ; additional specimens fpara-types — presented by 

 the Entomological Research Committee) as follows : — one 

 male from the Chitala Stream, Central Angoniland, Nyasa- 

 land Protectorate, alt. 1,7G0 ft., 18. i. 1911 [Dr. M. Sander- 

 son) ; two females from the Buo Valley, near Chiromo, 

 Nyasalaiid Protectorate, April, 1910 {S. A. Neave). 



Writing from the Dowa District, Nyasaland Protectorate, 

 in February, 1911, Dr. Meredith Sanderson, in whose honour 

 the species has been named, kindly supplied the following 

 field-note with reference to Tuhanas scmdersoni : — '^ Found 

 in marshy ground, sandy plains, and hills, but always where 

 there are trees or bush. Enters villages and houses; does 

 iiot bite immediately on settling, and may move about 

 before biting. In the act of sucking blood the abdomen is 

 elevated and the head lowered. Difficnlt to catch with the 

 hand," 



So far as it is possible to judge from the material available 

 for comparison, Tabanus sandersoni is perhaps allied to 

 T. quadriguttatus, Ricardo, more nearly than to any other 

 species of Tabanus yet described. Tabanus quadriguttatus, 

 which is at present known only from German East Africa, 

 exhibits, in the female sex at any rate, a decided resemblance 

 to T. sandersoni in the coloration and markings of the dorsum 

 of the abdomen, as also in the width of tlie front, and in the 

 shape &c. of the frontal callus and its upward extension. 

 Apart from other characters, however, the female of T. qnadri- 

 guttatus differs from that of the new species in its much 

 larger size, in the more slender shape and different coloration 

 of the terminal joint of the palpi (the outer surface of which 

 is uniformly dark slate-coloured, and ap})arently clothed 

 exclusively with minute black hairs), in the presence of a 

 border of ochre-yellow hair on each side of the dorsum of 

 the thorax, in the ground-colour of the ventral surface of the 

 abdomen (except the hind margins of certain segments) 

 being entirely black, in the veins in the distal half of the 

 wings being strongly suffnsed with mummy-brown, in the 

 stigma being large, burnt-umber-coloured, and very con- 

 spicuous, and in the anterior branch of the third longitudinal 

 vein not being angulate at the base nor provided with an 

 appendix. 



Tabanus simpsoni, sp. n. 



$ . — Length (1 specimen) 15-6 mm. : width of head oQ 

 mm. ; width of fi'ont at vertex O'To mm. ; length of wing 

 l-i'-l mm. 



