CERATOPOGON: PREDACEOUS SPECIES 161 



Kieffer divides the genus Ceratopogon into the following subgenera : 



1. Wings bare v . . < , . . . . . AtricopOgOfl. 



Wings hairy, at least in the female 2 



2. Hind metatarsus longer than the succeeding segment ; or 



equal to it in the male, and longer in the female . . Ceratopogon. 

 Hind metatarsus shorter than the succeeding segment ; or 



equal to it in the female, and shorter in the male . . Forcipomyia. 

 There are some fifty or more species of Ceratopogon (sensu lato) from 

 Europe, America, India, and Australia. Kieffer gives the following key 

 to the six species of Ceratopogon (sensu restricto) at present recorded 

 from India. It is not known whether they are blood-suckers or not. 



INDIAN SPECIES OF CERATOPOGON 



1. Wings hairy ............. 2 



Wings not pilose but with microscopical hairs .... indianus. 



2. Wings with a white spot at the extremity of third long vein .... 8 

 Wings with one or two black spots . ....... 4 



3. Anterior metatarsus a little shorter than the second segment, 



two to three times as long as broad ..... albosignatus. 

 Anterior metatarsus much shorter than the second segment, 



a little longer than broad albonotatus. 



4. Wing with a black spot on the radial cell (base of the wing) ; 



anterior metatarsus equal to two-thirds of the length of the 



second segment macrorhynchus. 



Wing with two black spots on the anterior border ; anterior 



metatarsus not half as long as the second segment ..... 3 



5. Mesonotum dull, of chestnut brown, with long and scanty 



hairs ; distal part of the fourth long vein without a stalk . decipiens. 

 Mesonotum of a brownish black with a golden pubescence ; 



distal part of the fourth long vein with a stalk . . . auronltans. 



Ceratopogon (Atricopogon) indianus, Kief., from the Zoological 

 Gardens, Calcutta ; C. albosignatus, Kief., from Rangoon in 

 February ; C. albonotatus, Kief., from Calcutta ; C. macrorhynchus, 

 Kief., from Calcutta; C. decipiens, Kief., from Simla in May; 

 C. auronitans, Kief., from Lower Burma. 



Austen has recently pointed out that Ceratopogon (Forcipomyia) 

 castaneus, Walk., is a common blood-sucker in Southern Nigeria. 



Major Lalor, I. M.S., has recently recorded from Burma a predaceous 



species of Ceratopogon which preys on Anipheles 

 . _. . J . Predaceous species 



fuhgtnosus, A.karwart and A.ludlowi. About six per of Ceratopogon 



cent of fuliginosus caught in houses were thus attacked, 

 the flies adhering to the abdomen and neck of the mosquito ; some of the 

 Ceratopogon contained blood, probably sucked up from the mid-gut of the 

 mosquito. Dr. Stanton records another Ceratopogon which attacks 

 Anopheles fuliginosus, A.karwari, and A.sinensis in the same way in 

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