D. Keilin 
3. Leger and Duboscq (1902) found in Anopheles larvae at Campo di Loro, 
Corsica, a filamentous fungus similar to that previously noticed by Perroncito. 
4. Laveran (1902) describes a parasitic yeast discovered by him in the 
coelomic cavity of Anopheles maculipennis from Rio-Tinto (Spain). According 
to Dr Macdonald this yeast is probably transmitted from the larva to the adult. 
5. A fungus Coelomomyces stegomyiae Keilin parasitic in the larva of Stego- 
myia scutellaris is described in the present paper; the parasitised host was 
found by Dr Lamborn at Kajang, Federated Malay States. 
Bacteria: A bacterial parasite resembling Leptotrix huccalis was discovered 
by Perroncito (1899, quoted by Howard, Dyar and Knab) as pathogenic to 
Anopheles maculipennis in Turin, Italy. It infests the larva, passes into the 
pupa, and destroys the imago soon after it emerges. 
Spirochaeta: Spirochaeta culicis Jaffe is described by Jaffe (1907) as infest¬ 
ing the alimentary canal of undetermined mosquito larvae collected near 
Berlin. A similar organism was found by Sergent and Sergent (190G) in 
Anopheles maculipennis larvae in Algeria. 
Sporozoa: Gregarina. Lankesteria culicis (Ross 1898) Wenyon 1911 was 
found by R. Ross in mosquito larvae at Secunderabad and by Marchoux. 
Salimbeni and Simond (1903) in Aedes calopus at Rio de Janeiro. The com¬ 
plete life history of this gregarine (from St. fasciata , Bagdad) we owe to 
Wenyon. Leger and Duboscq (1902) found a Diplocystis in mosquito larvae 
in Corsica. 
Schizogregarina: A schizogregarine belonging to the genus Caulleryella 
Keilin (1914) has been recently described by Hesse (1918) under the name 
Caulleryella anophelis n.sp. parasitic in the alimentary canal of Anopheles 
hifurcatus larvae in Dauphine, France. 
Microsporidia. 1 . Nosema stegomyiae was found by Marchoux, Salimbeni 
and Simond (1903) as pathogenic to Stegomyia fasciata larvae. 
2. Thelohania legeri Hesse was described by Hesse (1904) as parasitic in 
Anopheles maculipennis larvae. 
Thel. magna Kudo and Thel. illinoisensis Kudo were found by Kudo 
(1921) in the larvae of Culex pipiens and Anopheles punctipennis respectivelv. 
Flagellata: Leger (1902) describes Crithidia fasciculata n.sp. parasitic in 
the gut of Anopheles maculipennis ; the parasite is transmitted hereditarily. 
Ciliata: A new ciliate, Lambornella stegomyiae Keilin was discovered by 
Lamborn in the body-cavity of Stegomyia scutellaris larvae, from Federated 
Malay States. 
Nematoda: An Agamomermis was described by Stiles (1899, quoted by 
Howard, Dyar and Knab) from Culex nemoralis near Leipzig. 
Dr Smith (quoted by Howard, Dyar and Knab, 1912, p. 1G3) records that 
in 1902 Dr II. P. Johns found the young of an intestinal worm in an Anopheles 
larva. 
