B^ R. ILLIDGE AND AMBROSE QUAIL, F.E.S. 169 



the jaws, suoh action causing the larger spicules to become 

 blunter, the spicules are directed backwards {i.e., upward). 



The tubercles and setae of thoracic and abdominal segments 

 are as described of the preceding species. The prothoracic 

 spiracle is extremely large, earshaped with convex curve posterior. 

 Owing to innumerable number of brown spicules which cover 

 the thoracie and abdominal segments on dorsum, laterally, and 

 ventrally, intersegmental tubercles cannot be detected, nor can 

 the extra abdominal setae, except the small remote supra- 

 spiracular. 



These larvae grow to a very large size, we have a specimen 

 which is, we believe, this species in its ultimate instar, in 

 length 16-4 cm. ; in width, 19 mm. ; being so large it offers a 

 good subject to examine for different structures. The colour is 

 dirty whitish yellow, jaws brown, head dark brown shading to 

 yellow at suture of clypeus, scutellum yellow anterior margin 

 with dark brown shading to reddish either side of a V shape 

 median mark yellow in colour which spreads over the whole 

 posterior area of scutellum on which the spicules show distinctly 

 as little brown dots ; the abdominal humps are slightly brownish 

 from the numerous brown spicules ; the tubercles are little 

 brown areas on the skin, but the spiracles are very dark brown, 

 almost black, raised oval rims, the dorsum of the anal segment 

 is brown with posterior horns of darker brown colour. 



In most respects it agrees with the above description as 

 regards structure, but the frontal spicules are foicr in number, 

 the largest of the hinder flanking spicules marking the 

 trapezoid similar to Boisduvali. The skin of the thoracic 

 segments has numerous brown spicules, but the abdominal 

 segments are practically free from spicules except on the humps. 

 The pro-meso-thoracic intersegment carries a dorsal seta 

 (almost hidden by posterior edge of scutellum) just below the 

 dorsal pair of setae in position, and two lateral setae below the 

 subdorsal pair of setae. The meso-post thoracic intersegmental 

 area carries two lateral setae, but cannot detect dorsal setae. 

 The extra dorsal anterior setae of abdominal segments are just 

 below the posterior trapezoidal tubercles in longitudinal position ;, 

 it seems probable that the minute anterior supraspiracular 

 tubercle is homologous with the lower thoracic intersegmental 

 seta, which it resembles in size, and approximates in position. 

 The extra tubercle of 9th abdominal segment are a little more 



o 



