I. Juli 1887. 



NOV 2£ 18Ö7 



No. 7. 



II. Jahrgang. 



Societas entomologica. 





Journal de la Societe entomologique 

 internationale. 



Toutes les eorrespondanecs devront etre adressees 

 ä Mr. Je p resident Fritz Riihl a Zurich-Hottingen. 

 Messieurs les membres de la societe sont pries d'cn- 

 voye» des contributions originales pourlapartic scienti- 

 fique du Journal. 



Organ für den internationalen 

 Entomologenverein. 



Alle Zuschriften an iU'n Verein sind an den Vor- 

 stand desselben Herrn Fritz Riihl in Zürich - Hot- 



tingeil zu richten. Die Herren Mitglieder des Ver- 

 eins sind freundlich ersucht, Originalbei träge für 

 den wissenschaftlichen Theil des Blattes einzusenden. 



Organ for the International-Entomolo- 

 gical Society. 



AU letters for the Society arc lo be directed to Mr. 

 Fritz Riihl at Zürich-Hottittgen. The Hon. members oF 

 the Society are kindly requested to send original 

 eontributions for the scientific part of the paper. 



The Fly Species on the llovuma 

 in Central AfVica. 



By John Lewis. 



The l'ivor-system of the mighty Rovuma is 

 exe.cedingly varied in the developcmcnt of ita 

 flora as well as in its rockformations. Rolling 

 hüls rest the eye from the sight of vast and broad 

 Valleys. Rieh green forests, almost inaccessible 

 on aecount of the thorny clinging viries streteh 

 far beyond the view and alternate with lnxnrious 

 and well eultivated plantations. Caoutchouc trecs 

 and Stercularia stand alone along the hedges 

 which Surround the Bangha and tobaeco-plantations. 

 The flies of theso regions afford to the cäreful 

 observer a rieh and instruetive field of Observation 

 in those districts not infested by the Tsetse fly. 

 Happily certain regions are free from this terrible 

 ennemy of the beasts of bürden so needful to the 

 . traveler. Where this fly is found in swarms the 

 j'existance of men and animals is endangered. 

 Alrcady on the shores of lake Nangadi as well 

 as along the river of the samc name every twig 

 is covered with the Odontomyia specics, a black 

 Oxycera is very frequent and the Ncmotelus species 

 are every where to be found. The neighborhood 

 of a scttlement is generally betrayed by the pre- 

 sence of the Pangonia specics which is easily 

 distinguishod from the Tabanus. These bloodsuckes 

 fall upon men and animals and give the traveler 

 110 rest. They are specially noted for endurance 

 and rapidity in flight. Notorious arc the : Tabanus 

 fasciatus F., auripunetatus F., vittatus F., carbo- 

 liiii-ius Mg. dorsivittata Walk., secedens Walk., 

 conformis Walk. Upon the Mandarin plants that 

 arc cult'vated instead of potatoes, are found 

 Thereva nubus Wied. and Xestomyza lugubris 

 Wied. 



The fauna of the Rovuma is poor in species 

 of Hilaris and Empis bat all the richer in indivi- 



duals. The clinging plants offer a goodly catch in 

 the way of Eumcrus species which much resemblc 

 European forms. Among these are found now and 

 then : Paragus and Ocyptamus species. On the 

 swamp-reeds a Rhingia, which is perhaps new, is 

 frequent. Myriads of Syrphus, such as S. nubus 

 Wied., incertus Wied., ericetorum F., flit from 

 leaf to leaf. One can scarcely form an idea of the 

 busy life of the Eristalis which are found in great 

 quantities and together with the numerous Helo- 

 philus render the catching of other Diptera diffi- 

 eult. Whenever the slaughter of a beast of bürden 

 is rendered necessary by lack of fodder or over 

 exhaustion, the insect-life reaches its aeme. In a 

 very few minutes the parts thrown away arc co- 

 vered with thousands of flies, hundreds of which 

 may be caught if any one prepared with six or 

 eight nets can support the heat of the sun and 

 the bites of the flies. 



Zu Eurymene dolabraria. 



Von Arnulf Hiller. 



Der im Mai und Juni fliegende Schmetterling 

 wurde wohl noch nirgends in Mehrzahl beobachtet; 

 obgleich in Europa weit verbreitet, wird er allent- 

 halben einzeln gefunden, tadellose Exemplare sieht 

 man verhältnissmässig nur in wenigen Sammlun- 

 gen. Die meisten Stücke sind gefangene Thicre, 

 an Schönheit weit hinter den gezogenen zurück- 

 stehend, welche stets von Liebhabern und Samm- 

 lern begehrt sind. Die Zucht ist sehr leicht und 

 gibt bei entsprechender Pflege fast keine Verluste; 

 doppelt angenehm ist sie insofern, als keine die 

 Raupen dezimirendc Ueberwinterung zu über- 

 stehen, und das Raupenleben kein längerdauern- 

 des ist. Am 12. Juni begann ein am 10. dieses 

 Monats gefangenes schon gänzlich abgeflogenes 

 Weibchen mit der Absetzung seiner Eier, es waren 



