96 Mr. E. E. Austen on new 



running across posterior cells parallel to hind margin ; 

 remains of lower half of rosette round distal extremity of 

 discal cell and sometimes also those of lower half of rosette 

 round distal extremity of second basal cell visible above this 

 series of marks ; anal angle, a rather broad streak across 

 axillary cell a little below the middle, and alula hyaline ; 

 stigma clove-brown, elongate, sharply defined and con- 

 spicuous. Halteres buff or cream-buff, knob seal-brown at 

 base above and below. Legs : femora dusky, greyish polli- 

 nose; tarsi dark brown, first joint of middle and hind pairs 

 except tip usually lighter (ochraceous buff). 



North-western Rhodesia ; type and a large number of 

 other specimens from the Kasempa District, January 1908 

 {District Commissioner E. A. Copeman). Mr. Copeman, in 

 whose honour I have much pleasure in naming this species, 

 when forwarding the specimens together with seven others 

 belonging to Hamatopota pertinens, Austen, and two species 

 not yet determined, wrote that these flies are " an awful pest 

 in the early rainy season; their bites cause irritation and 

 swelling, but I have not heard that they carry any known 

 disease-germs." 



Heematopota copemanii belongs to a group of species, other 

 members of which are H. similis, Ricardo, H. unicolor, Ri- 

 cardo, H. denshamii, Austen, and H. laverani, Surcouf, and 

 to which H. pertinens, Austen, is somewhat more distantly 

 allied. From all of those mentioned the new species is 

 distinguished by the absence of the median spot below the 

 frontal callus. It agrees with H. similis and H. denshamii in 

 the pattern of the wing-markings, but differs from both in 

 the lighter coloration of the pollinose covering of the body, 

 in the light area in the wings being more hyaline (therefore 

 presenting a greater contrast to the dark border, in which 

 the light markings are more sharply defined), and especially 

 in the basal cells being entirely hyaline. H. copemanii 

 differs from H. denshamii in the frontal callus being less 

 deep, and from H. similis in the palpi being more slender 

 and paler. From H. laverani (Congo Free State) H. cope- 

 manii is distinguished by the frontal callus being slightly 

 shallower on each side of the middle line, the light area in 

 the wings and the light wing-markings being more hyaline, 

 the first and second costal cells being darker, and the 

 stigma being distinctly longer and darker. The colour of 

 the frontal callus and the much smaller first joint of the 

 antenna will suffice to distinguish H. copemanii from H. uni- 

 color, Ricardo. 



