RHINOMYZA 



823 



The characteristic of the genus is the extremely long proboscis. 

 The antennal characters of Pangonia are shown in Fig. 4^8, /, 

 and of Erephopsis at g in the same figure. The females are known 

 to be very blood-thirsty and to bite while on the wing, a feat which 

 they can readily perform owing to the length of the proboscis. _ At 

 the present time the life-history is unknown, and the pathogenicity 

 is also unknown. 



As examples the following may be mentioned :P. rostrata Linnaeus, 

 1764; P. varicolov Wiedemann, 1828: P. gulosa Wiedemann, 1828, 

 in Africa; P. beckeri Bezzi, 1900, in Somaliiand ; P. ruppellii Jaen- 

 nicke, 1867, in the Anglo-Egyptian Sudan and British East Africa; 

 P. comata Austen, 1912, in East Africa; Diatomineura suavis Loew, 

 1858, in South Africa; D. [Corizonetira) lineatithor ax Anst en, 1912, in 

 Northern Rhodesia; D. {Corizoneura) penetrabilis Austen, 1912, 

 in Northern Rhodesia; and D. {Corizoneura) hasta Austen, 1912, 

 in Portuguese East Africa. 



Rhinomyza Wiedemann, 1820. 



In this genus the first and second segments of the antennae are 

 short, while the third segment is composed of five rings (Fig. 408, c). 

 Moreover, the third segment has a well-marked tooth. The pro- 

 boscis is short. R. fusca Wiedemann, 1820, is known in Java, 

 and R. denticornis Wiedemann, 1828, in South Africa. R. costata 

 Loew, R. edentula Wiedemann, and R. pusilla Schiner may also 

 be noted, as may R. umbraticola Austen, 1911, in North-Eastern 

 Rhodesia and Kalanga, while P. maculata Surcouf is found in 

 Madagascar. 



Other Genera. 



other genera of the Pangoniinae are Dicvania Macquart in Brazil, Apo- 

 campta Schiner in Australia, Pityocera Tos in Central America, Goniops 

 Aldrich in North America, Pelecorhynchus Macquart in Australia and South 

 America, Apatolestes Williston in California, Dorcalcsmus Austen in South 

 Africa, Scione Walker in South America, Pronopes Loew in South Africa, 

 Gastroxides Saunders in India, and Subpangonia Surcouf in West Africa. 



Family Leptid^. 



Orthorrhapha hracliyceva with brownish, medium-sized, or long narrow 

 bodies and small heads. The third antennal joint is short, and carries either 

 a terminal brush or bristle. The proboscis resembles that of the Tabanidse, 

 as does the wing venation. 



Three genera are accused of blood-sucking: Leptis, Symphoromyia, and 

 Trichopalpus. 



With regard to Leptis, the species L. scolopacea Linnaeus and L. strigosa 

 Meigen are said to bite persons in France, but this is rare. Symphoromyia 

 (species uncertain), characterized by a single spur on the hind tibia and a 

 kidney-shaped third antennal joint, is found in California. Trichopalpus 

 obscurus Phil, is known in Chili. 



The life-history of the blood-sucking species is not known, but the other 

 larvae of the Leptidae live upon decaying vegetable matter. 



