328 THE ENTOMOLOGIST. 



The first fly is quite obviously a Tabanus, or horse-fly ; 

 and therefore Stanley's description of it is omitted. The 

 description of the sucker of the second indicates its affinity to 

 Stomoxys. The third is Glossina longipalpis, Wiedemann, 

 or the tsetze ; and by this name it is probable that some 

 other kinds of flies have been lately noticed in books. 



The tsetze was nnknovvn in Europe by name, till it was 

 called Glossina longipalpis in 1830. There were then two 

 specimens of it in the British Museum, and these I recorded 

 in the B. M, Cat. of Diptera, 1849 : one (from the Congo) I 

 named G. longipalpis ? and the other — which was paler and 

 much larger than the first, and whose locality was unknown 

 — I named G. fusca. In both the markings of the abdomen 

 had disappeared; but several other specimens which are now 

 in the British Museum, and which agree exactly with 

 Wiedemann's description, show clearly that they are all one 

 species, and that the name G. fusca must be annulled. Some 

 specimens are hardly larger than the house-fly; others are 

 much larger. It ranges from Sierra Leone to South Africa, 

 and thence to East Africa and to the interior; and Stanley 

 does not mention that it is poisonous. The genera Prosena 

 and Glossina may be united to Stomoxys, the differences 

 being very slight. Stomoxys Cytorus, from West Africa, is 

 quite different from G. longipalpis; and S. ^Eno, from New 

 Zealand, hardly differs from S. irritans, a common English 

 species, which is often supposed to be Musca domestica, the 

 house-fly. 



Francis Walker. 



On some Amur land /wsec/s (Part III.). — The Linnean genus, 

 Diopsis, is composed of some well-known flies, with eyes at 

 the ends of long stalks ; and the purpose of this adaptation 

 has not been much investigated. Its region is in or near to 

 the tropics on both sides of the equator, and extends from 

 Sierra Leone to Natal, and from thence to South Asia and to 

 the Eastern Isles. Achias is another and less-known genus, 

 which is found in South America and in the Eastern Isles, 

 and has also the sides of the head lengthened and attenuated 

 into shafts, which are terminated by the eyes; but these 

 appendages ar?- not quite like those of Diopsis in structure. 



