276 Insecta. 



899) Edwards, F. W., Notes on the British Mosquitos (Culicinae). In: Entomo- 

 logist, Bd. 45, Heft 7, S. 191—195; Heft 8, S. 217—220; Heft 9, S. 261—264. 



A revisiou of the British Mosquitos, eaumerating 14 species. 



H. Scott (Cambridge). 



900) Schnee, Über Mücken in Saipan. In: Arch. f. Schiffs- und Tropenhyg., Bd. 16. 

 S. 710, 1912. 



Auf Saipan werden von Mücken nur Culex und Stegomyia, keine Anopheles gefunden. 



Schellack fBerlin). 



901) Theobald, F. Y., Diptera, Culicidae [of the Seychelles and Aldabra]. In: 

 Trans. Linn. Soc. London (S. 2, Zool.), Bd. XV, Heft 1, S. 81—94, Taf. 4, Textfig., 1912. 



9 species of Culicidae are here enumerated as known from the islands visited by 

 the Percy Sladen Trust Exp., 5 being described as new. The genus Anopheles is entirely 

 absent. H. Scott (Cambridge). 



902) Eysell, A,, Cyclophorus (Anopheles) nigripes Staeger (nov. gen.). In: 

 Arch. f. Schiffs- und Tropenhyg., Bd. 16, S. 421—431, 1912. 



Der stark abweichende Bau der Eier, Larven und Puppen obiger, bisher zu 

 der Gattung Anopheles gerechneten Mücke bestimmte den Verfasser, eine neue 

 Anophelinen-Gattung Cyclophorus aufzustellen. Das Material zur Untersuchung 

 wurde durch künstliche Aufzucht der Mücken erhalten. Das Ei ist im Unterschied 

 von allen anderen Anopheles-Avten von einem Schwimmring umgeben, die Aus- 

 schlüpföffnung ist ebenfalls anders gestaltet; die Larven sind außer durch ihre 

 Körperform vor allem durch den stark abweichenden Bau der Zinkenkämme der 

 Stigmenöffnungen von Anopheles-harven unterschieden, die Puppen hauptsächlich 

 durch das Vorhandensein zweier gegabelter Borsten am vorletzten Körpersegment. 



Schellack (Berlin). 



903) Hewlett, J. M., The effect of Oil of Citronella on two species of 

 Dacus. Li: Trans. Ent. Soc. London, Heft 2, S. 412—418, Taf. XXXIX, XL, 

 1912. 



During experiments at Pusa (Bengal) the author found that Oil of Citronella 

 was highly attractive to the fruit-flie Dacus zonatus Saund. Large numbers of 

 specimens come (sometimes apparently frora considerable distances) to rags or 

 fiy-papers moistened with this oil and exposed in the open. Practically all the 

 flies so attracted are d"c?: of about 18000 specimens caught during the montlis 

 March-June with fly-papers moistened with Citronella Oil, only 0,3 per cent 

 were $$. The author then found that if a number of $$ are confined in a clean 

 glass tube for some time, an odour resembling Citronella becomes distinctly per- 

 ceptible, but that if a number of cTc? are similarly confined, there is no such 

 odour: therefore it seems that the odour of Citronella resembles a sexual odour 

 emitted by the ?. The o'c? probably perceive the smell by means of the an- 

 tennae: the antennae of some of those visiting a rag moistened with Citronella 

 were amputated, and the flies when liberated did not revisit the rag, though 

 normal flies returned to it even when driven away repeatedly. The flies prefer 

 the smell not too strong, but even then it has a stupefying effect after a time: 

 when they are exposed to the vapour in a concentrated form it has a poisonous 

 effect. The cfd", when near the Citronella, make movements which seem to be 

 usually associated with "courtship". The odour is also attractive to <Sd of Dacus 

 diversus Coq. 



Other instances of attraction by smells are mentioned: e. g., a Solution of 

 scatol (normally present in faeces) is highly attractive to Sarcopliaga. The author 

 considers that possibly each or a large number of species raay be attuned to 

 respond to certain smells: the cT may respond to a certain smell emitted by the 



