C. G. Hewitt 
169 
also refers to its breeding in mushrooms. In 1908 Dr David Sharp 
submitted the larva of this species to me for examination. He had 
found it in rotting fungus in the New Forest in September 1905 and 
noticed its similarity to Swammerdam’s Latrine Larva. 
The larvae emerge as early as eighteen hours after the deposition of 
the eggs and become full-grown in six to twelve days. The shortest 
time which I have recorded for the pupal stage was nine days, which 
was in the month of August, but I believe that under very favourable 
conditions the pupal stage would be passed in a shorter time. 
Larva. The larva of this species (Fig. 2) has a general resemblance 
to that of F. canicularis, but a closer examination will reveal very 
marked differences and a number of distin2:uishincr characters. In 
shape it is similar to the larva of F. canicularis, being compressed 
dorso-laterally. The appendages, or processes, however, are very different. 
The pair of antenna-like processes at the anterior and upper edge of 
Fig. 7. Fannia scalaris. Larva. Ventral side of segment VII. 
the prothoracic (second) segment are much shorter than those of 
F. canicularis, as will be seen from the figure, where they are shown 
dorsal to the oral lobes. On the dorsal side of the larva, from 
segment III to segment XI, is a series of nine pairs of short and 
somewhat thick processes of a very spiny character; the first two pairs 
being little more than spinous tubercles. As the processes of the third 
segment differ from the succeeding .segment, they may be mentioned 
separately. There is a pair of latero-dorsal processes bearing spines. 
Ventral and slightly anterior to the base of each of these processes 
is a small spiniferous papilla. A short spinous latero-ventral appendage 
is situated slightly more posteriorly. Viewed from above the larva is 
seen to be surrounded by a fringe of feather-like processes. Segments 
IV to XI are each provided with a pair of pinnate latero-dorsal pro¬ 
cesses which gradually increase in size posteriorly. Three pairs of 
these pinnate processes surround the obliquely truncate dorsal surface 
of the twelfth segment. Situated laterally and ventral to the series of 
pinnate processes is a series of latero-ventral processes whicli are spinous 
