(61) 
HEBPETOMONIDAE FOUND IN SCATOPHAGA HOTTENTOTA 
AND CHAMAELEON PUMILUS. 
By H. Bayon. 
(Eead September 16, 1914.) 
In December, 1912, 1 noticed numerous flagellate micro-organisms in a 
smear taken from the hind-gut of a specimen of Scatophaga hottentota 
caught on Kobben Island. The slide was dried, fixed in absolute alcohol 
and stained with Eosine-azur. The flagellates were then seen to belong to 
the genus IIerpetomo?ias. They presented the usual elongated shape, with 
a flagellum attached to the protozoon by a short, intra-cellular portion. 
The short, rod-like kinetonucleus was usually found half-way between 
the trophonucleus and the flagellar ('* anterior ") end of the parasite. The 
kinetonucleus was separated from the flagellum by an interval of about 
2 fx. No undulating membrane could be detected. 
Biflagellate forms (Prowazeks Heiyetornonas type) were also observed, 
apparently as a stage of commencing division. Moreover single, non- 
flagellate, rounded individuals, with a trophonucleus and kinetonucleus 
(blepharoplast), in addition to all the morphologically intermediate 
conditions between the latter and the usual elongated, flagellate Herpe- 
tomonas ; such transitory forms corresponding to the three stages 
described by Patton as preflagellate, flagellate, and post-flagellate. 
The length of the body of the flagellate stages varies between 25 and 
45 fjL. The width is not usually less than 2 or more than 5 ^. In speci- 
mens which were fixed in a straight line the flagellum could be seen to be 
about one and a half times the length of the body proper. 
Pounded, non-flagellate stages varied from 5 to 8 ^ in diameter. The 
size of the trophonucleus was relatively constant in all specimens 
observed, irrespective of their stage and can be stated to correspond to 4 ji. 
All measurements were taken on the fixed and stained slide. This 
protozoon corresponds in type to the genus Herpetomonas (Leptomonas) 
especially the species H. muscae domesticae Burnett. Its host in this case 
is the common " blind-fly " on Eobben Island. 
