200 



only cases of the latter being doubtless attributable to a smaller 

 piece of stagnant water as yet undrained. The drying- of marshy 

 ground in the Mateur hollow has also lessened disease there, and 

 herds of swine are frequently driven through the waters of the 

 overflow so as to interfere with the breeding of Anopheles in them. 

 Sluggish streams in the Cape Bon and Beja regions, and stagnant 

 water from the inundations of the river passing through the plain 

 of Tabarka, tell the same tale of disease, against which, pending 

 drainage, there appears to be no remedj^ except the distribution of 

 quinine. 



AVeiss (A.). Seconde addition au Catalogue des Arthropodes 

 Piqueurs de I'lle de Djerba. [A furtlier addition to the list 

 of biting arthropods of the Island of Jerba.] — Arch. Instit. 

 J/a.steur, Tunis, nos. i & ii, 1913, p. 118. 



The author states that Culew geniculatvs, Oliv. (= hortensis, 

 Pic), known in France and Italy, appeared in great numbers at 

 Jerba — the first time it has been observed in Northern Africa — 

 during the whole winter of 1912-1913, its reproduction taking 

 place in polluted waters. A solitary specimen oiTahamus cordiger, 

 Meigen, probably carried on a beast imported from the Continent, 

 was found in October 1912. Lynrhia maura, Bigot, a parasite of 

 the domestic pigeon, has also been observed. 



MiTZMAiN (M. Bruin). The Biology of Tabanns striatiis, Eabr., 

 the Horsefly of the Philippines. — Philippine Jl. of Science, 

 Manila, viii, Ser. B, no. 3, June 1913, pp. 197-218, 7 pis. 



The author says that T. striatus is the most prevalent horsefly 

 of the Philippines, and is possibly concerned in the transmission 

 of trypanosomes, because it is abundant wherever surra is found, 

 and the seasonal distribution of the fly and the disease are more 

 or less coincident throughout the Archipelago. In Manila, and 

 within a radius of 50 kilometres, T. striatus is found more or less 

 continuously from October to March, but this also applies to other 

 blood-sucking flies. In the Philippines, Tahanus has never been 

 proved to be a carrier of trypanosomes, but it is at present the 

 subject of experimental investigation. For this purpose it was 

 essential first to breed the fly in large numbers and this paper 

 contains the results of the rearing of thousands of flies under 

 laboratory conditions in the Veterinary Research Laboratory, 

 Alabang, Eizal. TTp to the time of writing this paper, the author 

 had not succeeded in locating eggs or larvae in their natural 

 habitat, in spite of great efforts extending over three months, 

 though while it was passing through the press both larvae and 

 puppe were discovered in large numbers buried in sand at many 

 points on the shore of Laguna de Bay. The area in the neighbour- 

 hood of the laboratory proved an ideal place for the study of the 

 fly. A herd of 50 cattle was pastured on it, and until about 

 2 o'clock in the day the animals were disturbed by the attacks 

 of the flies, which during the hotter portions of the day and 



