LARVA OF FA y XI A SCALARIS 195 



The larva of this species (fig. 87) has a general resemblance 

 to that of F. canicidaris, but a closer examination will reveal very 

 marked differences and a number of distinguishing characters. 

 In shape it is similar to the larva of F. canicularis, being com- 

 pressed dorso-laterally. The appendages or processes, however, 

 are very different. The pair of antenna-like processes at the 

 anterior and upper edge of the prothoracic (second) segment are 

 much shorter than those of F. canicidaris, 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 



Fig. 88. Fannia scalarix. Larva. Ventral aspect of segment vir. 



a small spiniferous papilla. A short spinous latero-ventral ap- 

 pendage 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 processes 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 which are spinous (as shown 

 in fig. 88), but much less pinnate and shorter than the latero- 

 dorsal series. The latero-ventral processes of segment XII are 

 situated more ventrally than those of the preceding segments, and 

 their usual place is taken by a small group of spines. Posterior 

 to the base of each of the latero-dorsal processes of segments V 

 to XI is a small branched process. 



13—2 



