884 REPORT OF THE HARVARD AFRICAN EXPEDITION 
dibrachiata (Oliver), one of the Rubiaceae: the flies hover and probe the corolla 
without resting on the flower. 
D. compactus is known from Portuguese East Africa, Nyasaland, Northern 
and Southern Rhodesia, the Katanga, Tanganyika Territory, and Kenya Colony. 
Dorcaloemus auricomus Austen 
Dorcaloemus auricomus Austen, 1911, Bull. Ent. Res., I, p. 286, fig. 3 (9; Mid-Lualaba Valley, 
3,000 ft., Katanga). 
This species has thus far been recorded only from the Katanga. I have, 
however, before me two females from Sawmills, Southern Rhodesia (R. H. R. 
Stevenson). 
Dorcaloemus candidolimbatus Austen 
Dorcaloemus candidolimbatus Austen, 1911, Bull. Ent. Res., I, p. 288 ( 9 #; mid-Lualaba Valley, 
Katanga). J. Bequaert, 1924, Psyche, XXXI, p. 34. 
Pangonia candidolimbata J. Bequaert, 1913, Rev. Zool. Afric., I, 3, p. 226 ( 2 ). 
This species is known only from the Katanga District of the Belgian Congo. 
Scaptia Walker 
Scaptia Walker, 1850, ‘Insecta Saundersiana,’ I, Dipt., p. 8. Type by designation of Coquillett 
(1910), accepted by Enderlein (1922): Pangonia aurata Macquart, 1838. Enderlein, 1925, 
Mitt. Zool. Mus. Berlin, XI, 2, p. 278. Ferguson, 1926, Bull. Ent. Res., XVI, 4, pp. 298 and 
302. 
Osca Walker, 1850, ‘Insecta Saundersiana,’ I, Dipt., p. 10. Type by designation of Coquillett 
(1910): Pangonia depressa Macquart, 1837 = Tabanus latus Guérin, 1835. Bréthes, 1914, 
Bull. Soc. Ent. France, p. 59. Austen, 1920, Bull. Ent. Res., XI, p. 189. Enderlein, 1925, 
Mitt. Zool. Mus. Berlin, XI, 2, p. 273. 
Diatomineura Rondani, 1863, Archiv. Zool. Anat. Fisiol. Canestrini, III, p. 84. Type by designa- 
tion of Coquillett (1910): Pangonia depressa Macquart, 1837 = Tabanus latus Guérin, 1835. 
Pseudoscaptia Enderlein, 1922, Mitt. Zool. Mus. Berlin, X, 2, p. 888; 1925, loc. cit., XI, 2, p. 277. 
Type by original designation: Pseudoscaptia scoliiformis Enderlein, 1922. 
Enderlein separates Pseudoscaptia from Osca solely by the relative size and 
shape of the palpi: in the former, they are half the length of the proboscis, with 
the terminal segment not pointed at apex, not excavated on the outer side and 
circular in cross-section; in the latter, they are over half the length of the 
proboscis, with the terminal segment strongly pointed apically. I do not believe 
that such slight differences are of more than specific (or perhaps only sexual) 
value. Somewhat similar characters are used by Enderlein to differentiate 
Scaptia and Osca, but Ferguson (1926) has shown that the Australian species 
vary considerably in the relative size of the palpi. Since Scaptza has page priority 
it should supersede Osca. 
To Scaptia appear to be referable the few Ethiopian so-called ‘‘ Pangoniae’”’ 
with pubescent eyes. The eyes are described as hairy in S. senegalensis (Mac- 
quart) and S. scoliiformis (Enderlein), both placed by Enderlein in his genus 
Pseudoscaptia (here regarded as not separable from Scaptia). Austen includes 
in Osca the Ethiopian Tabanus barbatus Linnaeus and Pangonia fulvifascia 
Walker; but Enderlein lists these two species in his genus Corizoneura ( = Buplea 
Austen) which is characterized by bare eyes. With Tabanus barbatus Linnaeus he 
